accountAccounts group one or more members together with specific roles or permissions. Accounts can be associated with any number of domains.Fundamentals
active zoneA DNS zone that is active on Cloudflare requires changing its nameservers to Cloudflare’s for management.Cloudflare One, DNS
alarmA Durable Object alarm is a mechanism that allows you to schedule the Durable Object to be woken up at a time in the future.Durable Objects
allowlistAn allowlist is a list of items (usually websites, IP addresses, email addresses, etc.) that are permitted to access a system.DDoS Protection, WAF
anycastAnycast is a network addressing and routing method in which incoming requests can be routed to a variety of different locations. Anycast typically routes incoming traffic to the nearest data center with the capacity to process the request efficiently.Magic Transit, Magic WAN
apex domainApex domain is used to refer to a domain that does not contain a subdomain part, such as (without www.). It is also known as “root domain” or “naked domain”.DNS
API key

An API key is unique to each Cloudflare user and used to confirm identity when using the Cloudflare API.

API tokenAPI tokens authorize access to specific Cloudflare dashboard pages, accounts, and zones. API tokens are associated to the user that created them.Fundamentals
App LauncherThe App Launcher portal provides end users with a single dashboard to open applications secured by Cloudflare Zero Trust.Cloudflare One
applicationThe resource protected by Cloudflare Zero Trust, which can be a subdomain, a path, or a SaaS application.Cloudflare One
attack scoreA number from 1 (likely malicious) to 99 (likely clean) classifying how likely an incoming request is malicious or not. Allows you to detect new attack techniques before they are publicly known.WAF
attributeTraffic that flows through Area 1 can receive one or more attributes, which indicate that a specific condition has been met.Area 1
Authenticated Origin PullsAuthenticated Origin Pulls allow origin web servers to validate that a web request came from Cloudflare using TLS client certificate authentication.Cloudflare One, SSL/TLS
backup codesBackup codes allow restoration of Cloudflare account access outside the normal two-factor authentication process. A backup code becomes invalid after use.Fundamentals
bandwidthThe maximum rate of data transfer across a network.Speed
bit field matchingMatches raw bits in a packet to certain values specified in your rules.Magic Firewall
blocklistA blocklist is a list of items (usually websites, IP addresses, email addresses, etc.) that are prevented from accessing a system.WAF
brotli compressionBrotli compression is a data compression algorithm developed by Google, optimized for web content, and designed to achieve higher compression ratios than traditional algorithms like Gzip.Speed
cacheA temporary storage area where frequently accessed data is stored for quick retrieval.Cache
cache hitWhen a requested piece of content is found in the cache, reducing the need to fetch it from the origin server.Cache
cache missWhen a requested piece of content is not found in the cache, requiring the server to fetch it from the origin server.Cache
cached bandwidth (cached egress bandwidth)The amount of bandwidth served from Cloudflare without hitting the origin server. Cached bandwidth is the sum of all EdgeResponseBytes where CacheCacheStatus equals hit, stale, updating, ignored, or revalidated.Cache
cached requestsThe number of requests served from Cloudflare without having to hit the origin server. Cached requests are the sum of all requests where CacheCacheStatus equals hit, stale, updating, ignored. This does not include revalidated since the request had to be sent to the origin server.Cache
cacheTtlCacheTtl is a parameter that defines the length of time in seconds that a KV result is cached in the global network location it is accessed from.KV
cachingThe process of storing copies of files or data in a cache to accelerate future requests.Cache
certificateSSL certificates enable encryption over HTTPS for traffic between a client and a website. SSL certificates contain the website’s public key and the website’s identity along with related information. Devices attempting to communicate with the origin web server reference the SSL certificate to obtain the public key and verify the server’s identity. Cloudflare provides a Universal SSL certificate for each active Cloudflare domain.SSL/TLS
Certificate Authority (CA)A CA is a trusted third party that provides SSL certificates for encrypting network traffic.SSL/TLS
certificate packsCertificate packs allow Cloudflare to fallback to a different SSL certificate for browsers that do not support the latest standards. Certificate packs allow Custom SSL certificates to contain different signature algorithms for the same hostnames listed within the SSL certificate without taking up additional Custom SSL certificate quota for your Cloudflare account.SSL/TLS
certificate pinningCertificate pinning is a security mechanism used to prevent on-path attacks on the Internet by hardcoding information about the certificate that the application expects to receive. If the wrong certificate is received, even if it is trusted by the system, the application will refuse to connect.SSL/TLS
Certification Authority Authorization (CAA) recordA CAA record declares which CAs are allowed to issue an SSL certificate for a domain.SSL/TLS
cipher suiteA set of encryption algorithms for establishing a secure communications connection. There are several cipher suites in wide use, and a client and server agree on the cipher suite to use when establishing the TLS connection. Support of multiple cipher suites allows compatibility across various clients.SSL/TLS
cloudA network of remote servers used to store and maintain data.Fundamentals
Cloudflare AccessCloudflare Access replaces corporate VPNs with Cloudflare’s network. It allows customers to deploy internal tools in any environment, including hybrid or multi-cloud models, and secure them consistently with Cloudflare’s network.Access, Cloudflare One
Cloudflare Browser IsolationCloudflare Browser Isolation seamlessly executes active webpage content in a secure isolated browser to protect users from zero-day attacks, malware, and phishing.Cloudflare One, Gateway, RBI, ZTNA
Cloudflare CASBCloudflare CASB provides comprehensive visibility and control over SaaS apps to prevent data leaks and compliance violations. It helps detect insider threats, Shadow IT, risky data sharing, and bad actors.CASB, Cloudflare One
Cloudflare Data Loss Prevention (DLP)Cloudflare Data Loss Prevention (DLP) allows you to scan your web traffic and SaaS applications for the presence of sensitive data such as social security numbers, financial information, secret keys, and source code.Cloudflare One, DLP
Cloudflare GatewayCloudflare Gateway is a modern next-generation firewall between your user, device, or network and the public Internet. It includes DNS filtering to inspect and apply policies to all Internet-bound DNS queries.Cloudflare One, Gateway
Cloudflare TunnelCloudflare Tunnel (formerly Argo Tunnel) establishes a secure outbound connection within your infrastructure to connect applications and machines to Cloudflare.Cloudflare One, Tunnel
Cloudflare Zero TrustCloudflare Zero Trust provides the power of Cloudflare’s global network to your internal teams and infrastructure. It empowers users with secure, fast, and seamless access to any device on the Internet.Cloudflare One
cloudflaredcloudflared is the software powering Cloudflare Tunnel. It runs on origin servers to connect to Cloudflare’s network and on client devices for non-HTTP traffic.Cloudflare One, Tunnel
compressionThe process of reducing the size of files or data to speed up their transfer over the network.Speed
consumerA consumer is the term for a client that is subscribing to or consuming messages from a queue.Queues
content delivery network (CDN)A geographically distributed group of servers which work together to provide fast delivery of Internet content.Cache, DDoS Protection, Fundamentals
content objectA content object is any binary part of a request body (as detected by Cloudflare systems) that does not match any of the following content types: text/html, text/x-shellscript, application/json, text/csv, or text/xml.WAF
content security policy (CSP)An added layer of security that helps detect and mitigate certain types of attacks such as cross-site scripting (XSS) attacks.Fundamentals
core web vitalsCore web vitals are a set of user-centric performance metrics, including Largest Contentful Paint (LCP), Cumulative Layout Shift (CLS), and First Input Delay (FID), used by Google to assess the overall user experience of a webpage.Speed
credential stuffingCredential stuffing is the automated injection of stolen username and password pairs (known as “credentials”) into website login forms, trying to gain access to user accounts.WAF
creditAn amount applied to a specific Cloudflare account as credit for recurring subscriptions or plan payments. The Cloudflare billing system automatically applies credits in the next billing cycle.Fundamentals
cumulative layout shift (CLS)Cumulative layout shift (CLS) is a web performance metric that quantifies the visual stability of a webpage by measuring the sum of unexpected layout shifts of elements during the page’s loading and rendering process.Speed
daemonA program that performs tasks without active management or maintenance.Cloudflare One, DDoS Protection, Tunnel
data centerA physical location where servers run and other IT operations are hosted.Fundamentals
data packetA data packet is a unit of data consisting of user and control information. Information in a network is broken down into packets, that might follow different paths to their final destination.Magic Firewall, Magic Transit, Magic WAN
denial-of-service (DoS) attackA DoS attack is a type of cyber attack in which an attacker aims to render a computer or other device unavailable to its intended users by interrupting the device’s normal functioning.Fundamentals
dispositionRepresents Area 1’s evaluation of a specific message. For example, after evaluating an email it may get a disposition of malicious. Email messages with this disposition exibit characteristics typical of malicious emails.Area 1
distributed denial-of-service (DDoS) attackA DDoS attack is a malicious attempt to disrupt normal traffic of a targeted server, service, or network by overwhelming the target or its surrounding infrastructure with a flood of Internet traffic.DDoS Protection, Fundamentals
DNS filteringDNS filtering uses the Domain Name System to block malicious websites and filter out harmful content, enhancing security and access control.Access, Cloudflare One, DNS, Gateway
DNS locationDNS locations are a collection of DNS endpoints which can be mapped to physical entities such as offices, homes, or data centers.Access, Cloudflare One, DNS, Gateway
DNS over HTTPSDNS over HTTPS (DoH) is a standard for encrypting DNS traffic via the HTTPS protocol, preventing tracking and spoofing of DNS queries., Cloudflare One, DNS
DNS over TLSDNS over TLS (DoT) is a standard for encrypting DNS traffic using its own port (853) and TLS encryption., Cloudflare One, DNS
DNS recordDNS records are instructions that live in authoritative DNS servers and provide information about a domain including what IP address is associated with that domain and how to handle requests for that domain.DNS
DNS serverDNS servers translate human-readable domain names into IP addresses, eliminating the need to remember complex IP addresses.Cloudflare One, DNS
DNS zoneA portion of the DNS namespace that is managed by a specific organization or administrator.DNS
DoH subdomainA unique DoH subdomain for each DNS location in Cloudflare Zero Trust used in WARP client settings.Cloudflare One
domainThe domain name of your application on Cloudflare.Fundamentals
Domain Name System (DNS)The Domain Name System (DNS) is the phonebook of the Internet. DNS translates domain names to IP addresses.DNS
dynamic contentDynamic content refers to website content that changes based on factors specific to the user such as time of visit, location, and device. News websites or social media are examples of this type of content. For this type of website, content has to be fetched from the origin server every time it is requested.Cache
edge response status codeHTTP response code sent from Cloudflare to the client (end user). The Cloudflare dashboard Analytics app uses the edge response status code.Fundamentals
edge serverA server located at the edge of a network, typically within a CDN, that serves content to end-users.Cache
encryption algorithmAn encryption algorithm is a set of mathematical operations performed on data to ensure the data is only understood by the intended recipient.SSL/TLS
equal-cost multi-path routingA technique that uses hashes calculated from packet data to determine the route chosen.Magic Transit, Magic WAN
exposed credentials

Exposed credentials refers to sensitive authentication information disclosed in some way (for example, due to misconfigurations, data breaches, or simple human error), allowing other parties to gain access to digital resources.

Credentials may include usernames, passwords, API keys, authentication tokens, or private keys.

Extended Validation (EV) certificateEV certificates provide maximum trust to visitors, but require the most validation effort by the CA. EV certificates show the name of the company or organization in the address bar of the visitor’s browser. An EV certificate requires additional documentation by the company or organization in order for the CA to approve the certificate.SSL/TLS
featureA feature is a setting in the Cloudflare dashboard that corresponds to functionality within a Cloudflare product or API.Fundamentals
firewallA firewall is a security system that monitors and controls network traffic based on a set of security rules.Magic Firewall, WAF
firewall-as-a-serviceAlso known as cloud firewall. A security product that is hosted in the cloud.Magic Firewall
first contentful paint (FCP)First contentful paint (FCP) is a web performance metric that measures the time it takes for the first piece of content to be rendered on the screen during the loading of a web page.Speed
first input delay (FID)First input delay (FID) is a web performance metric that measures the delay between a user’s first interaction with a page (for example, clicking a button) and the moment the browser responds, indicating the page’s interactivity and responsiveness.Speed
flow dataRepresents records of communication between devices. There are a number of flow data protocols, such as NetFlow or sFlow.Magic Network Monitoring
GRE tunnelStands for generic routing encapsulation. It is a protocol wrapping one data packet within another type of data packet. This is useful for enabling protocols that are not normally supported by a network.Magic Transit, Magic WAN
health check

Requests issued by a monitor at regular interval and — depending on the monitor settings — return a pass or fail value to make sure an origin is still able to receive traffic.

Each health monitor request is trying to answer two questions:

  1. Is the server offline?: Does the server respond to the health monitor request at all? If so, does it respond quickly enough (as specified in the monitor’s Timeout field)?
  2. Is the server working as expected?: Does the server respond with the expected HTTP response codes? Does it include specific information in the response body?

If the answer to either of these questions is “No”, then the server fails the health monitor request.

Load Balancing
hostnameThe name given to a server or node on a network, often the public DNS name of a server.Cloudflare One, DDoS Protection, DNS
HTTP requestAn HTTP request is the way Internet communications platforms such as web browsers ask for the information they need to load a website.Fundamentals
ICMPInternet Control Message Protocol (ICMP) is used by network devices to send error messages and other operational information. ICMP is useful for diagnostic purposes, for example.DDoS Protection, Magic Transit, Magic WAN
identity providerAn identity provider (IdP) stores and manages users’ digital identities, enabling single sign-on and authentication for multiple applications.Cloudflare One
interaction to next paint (INP)Interaction to next paint (INP) is a web performance metric that measures the time it takes for a web page to become interactive and respond to user input after the initial paint, providing insights into the user experience during the interaction phase of page loading.Speed
intermediate certificateFor security purposes, CAs issue intermediate certificates for signing website certificates. Intermediate certificates provide a means for the CA to revoke a single intermediate certificate, thus affecting only a small subset of website certificates.SSL/TLS
InternetThe Internet is a global system of computer networks that provides a wide range of information and communication facilities.Fundamentals
Internet key exchange (IKE)The protocol Cloudflare uses to create the IPsec tunnel between Magic WAN and the customer’s device.Magic Transit, Magic WAN
IP addressIP stands for Internet Protocol, which is the set of rules that makes it possible for devices to communicate over the Internet. With billions of people accessing the Internet every day, unique identifiers are necessary to keep track of who is doing what. The Internet Protocol solves this by assigning IP numbers to every device accessing the Internet. Every assigned number is an IP address.Fundamentals
IP spoofingIP spoofing is the creation of Internet Protocol (IP) packets which have a modified source address to hide the identity of the sender, impersonate another computer system, or both.DDoS Protection
IPsec tunnelStands for Internet Protocol secure. It is a group of protocols for securing connections between devices, by encrypting IP packets.Magic Transit, Magic WAN
JSON web tokenA compact way to securely transmit information between parties as a JSON object, often used for authentication.Cloudflare One
JSON web token (JWT)A common authentication and authorization method used in web applications and APIs.Rules
KV namespaceA KV namespace is a key-value database replicated to Cloudflare’s global network. A KV namespace must require a binding and an id.KV
largest contentful paint (LCP)Largest contentful paint (LCP) is a web performance metric that measures the time it takes for the largest content element to be fully rendered and visible to the user during the loading of a web page.Speed
latencyThe delay between a user action and the corresponding response from the system.Speed
lazy loadingLoading images or other resources only when they are about to be displayed, rather than loading everything at once.Speed
letter of agencySometimes referred to as a Letter of Authorization. A document that authorizes Cloudflare to advertise your prefixes. This is required so transit providers can accept the routes Cloudflare advertises on your behalf.Magic Transit
maximum segment size (MSS)MSS limits the size of packets, or small chunks of data, that travel across a network, such as the Internet.Magic Transit, Magic WAN
member or userA member or user is an email account in Cloudflare that you can grant access to your organization account. Members belonging to multiple accounts can select which account to manage via the Cloudflare dashboard.Fundamentals
metadataA metadata is a serializable value you append to each KV entry.KV

A Durable Object migration is a mapping process from a class name to a runtime state. Initiate a Durable Object migration when you need to:

  • Create a new Durable Object class.
  • Rename a Durable Object class.
  • Delete a Durable Object class.
  • Transfer an existing Durable Objects class.
Durable Objects
minificationThe process of removing unnecessary characters from code (such as whitespace or comments) to reduce file size and improve loading times.Speed
mitigated requestA request to which Cloudflare applied a terminating action such as block or challenge.WAF

A monitor issues health monitor requests at regular intervals to evaluate the health of each server within an origin pool.

When a pool becomes unhealthy, your load balancer takes that pool out of the server rotation.

Load Balancing
mTLS (mutual TLS)MTLS is a common security practice that uses client TLS certificates to provide an additional layer of protection, allowing to cryptographically verify the client information.SSL/TLS
nameserverA nameserver is a dedicated server that translates human readable hostnames into IP addresses. Nameservers like root servers, TLD servers, and authoritative nameservers are fundamental components of the Domain Name System (DNS).DDoS Protection, DNS
NetFlowNetwork protocol developed by Cisco to collect and monitor network traffic flow data.Magic Network Monitoring
Next-generation firewallA more powerful firewall with advanced features for modern security needs.Cloudflare One
OAuthA protocol for authorizing users, allowing them to perform actions and view data on different platforms without sharing credentials.Cloudflare One
on-rampRefers to a way of connecting a business network to Cloudflare. Examples of on-ramps, or ways to connect to Cloudflare, are Anycast GRE tunnels, Anycast IPsec tunnels, Cloudflare Network Interconnect (CNI), Cloudflare Tunnel, and WARP.Magic Transit, Magic WAN
OpenID ConnectA simple identity layer on top of OAuth 2.0 for verifying user identity and obtaining basic profile information.Cloudflare One
Organization Validated (OV) certificateOV certificates are used by corporations or governments to portray an extra layer of confidence for their visitors. Rather than just validating domain ownership, the CA also validates the company’s registration using qualified independent information sources. The organization’s name is listed in the certificate.SSL/TLS
origin bandwidth (origin egress bandwidth)The amount of data transferred from the origin server to Cloudflare within a certain period of time. Origin bandwidth is the sum of all EdgeResponseBytes where OriginResponseStatus does not equal 0.Cache
origin certificateA Cloudflare Origin Certificate is a free SSL/TLS certificate issued by Cloudflare that can be installed on your origin server to facilitate making sure your data is encrypted in transit from Cloudflare to your origin server using HTTPS.Cloudflare One, SSL/TLS
origin pool

Within Cloudflare, pools represent your origin servers and how they are organized. As such, a pool can be a group of several origin servers, or you could also have only one origin server per pool.

If you are familiar with DNS terminology, think of a pool as a “record set,” except Cloudflare only returns addresses that are considered healthy. You can attach health monitors to individual pools for customized monitoring.

Load Balancing
origin requestAn origin request is a request served from the origin server.Fundamentals
origin response status codeAn origin response status code is an HTTP response code sent from the origin server to Cloudflare.Fundamentals
origin serverThe original server where the web content is hosted before it is distributed to edge servers in a CDN.Cache
PAC fileA file containing a JavaScript function which can instruct a browser to forward traffic to a proxy server instead of directly to the destination server.Cloudflare One
page load timeThe time it takes for a web page to fully load in a user’s browser.Speed
phishingThe practice of trying to acquire sensitive data through fraudulent emails or other means. Usually, the perpetrators try to pass for a legitimate company when asking for sensitive data.Area 1

Plans distinguish the breadth of Cloudflare features accessible to a specific domain. Plan options include Free, Pro, Business, or Enterprise.

policyA set of rules that regulate network activity, such as login access and website reachability.Cloudflare One
policy-based routingPolicy-based routing (PBR) is a technique used to make routing decisions based on policies set by your administrador.Magic Transit, Magic WAN

A number that identifies the network portion of an IP address. It tells devices if an IP address is on the same network or not. It is shown as a number after a slash (for example, /31) at the end of the IP address.

Using an analogy, the prefix is like a street address. If an IP is in the same street, it belongs to the same network of devices.

Magic Network Monitoring, Magic Transit, Magic WAN
primary certificate / secondary certificatePrimary and secondary indicates the order in which Custom SSL certificates were uploaded to Cloudflare. The primary certificate is the first certificate added to a pack. The primary certificate defines the hostnames covered by the certificate.SSL/TLS
producerA producer is the term for a client that is publishing or producing messages on to a queue.Queues
protocolA protocol is a set of rules governing the exchange or transmission of data between devices.Fundamentals
public key / private keySSL public and private keys are essentially long strings of characters used for encrypting and decrypting data. Data encrypted with the public key can only be decrypted with the private key, and vice versa. Private keys are kept secret and unshared.SSL/TLS
purgeThe process of removing outdated content from the cache to make room for updated content and ensure the delivery of the latest content.Cache
queueA queue is a buffer or list that automatically scales as messages are written to it, and allows a consumer Worker to pull messages from that same queue.Queues
rate limitingRate limiting is a technique used in computer systems to control the rate at which requests are processed. It can be used as a security measure to prevent attacks, or to limit resource usage in your origin servers.WAF
RDPRemote Desktop Protocol (RDP) allows remote desktop connections to a computer, often used on Windows and Mac operating systems.Cloudflare One
real user monitoring (RUM)Real user monitoring (RUM) is a web performance monitoring technique that collects and analyzes data based on actual user interactions and experiences, providing insights into how users interact with a website or application in real-time.Speed
redirectURL redirects navigate the user from a source URL to a target URL using a given HTTP status code. URL redirection is also known as URL forwarding.Fundamentals
render timeThe time it takes for a browser to display a fully rendered web page after receiving the necessary resources.Speed
rolesAuthorize which Cloudflare products and features a member is allowed to access in a Cloudflare account. Learn more about roles.Fundamentals
root certificateA root certificate is generated by a CA and is used to sign certificates. Every browser includes a root store of trusted root certificates. Any certificate signed with the private key of a root certificate is automatically trusted by a browser.SSL/TLS
SafeSearchSafeSearch is a feature of search engines that filters explicit or offensive content from search results.Cloudflare One
SAMLSecurity Assertion Markup Language (SAML) enables single sign-on and authentication for multiple applications.Area 1, Cloudflare One
samplingIn the context of Magic Network Monitoring, sampling is the process of taking samples of packets for a specific period to identify potential attacks.Magic Network Monitoring
SASESecure Access Service Edge (SASE) is a cloud-based security model bundling networking and security functions.Cloudflare One
saved bandwidth (saved egress bandwidth)The percentage of bandwidth saved by caching on the Cloudflare network.Cache
search engine optimization (SEO)SEO, or search engine optimization, is the practice of optimizing online content to improve its visibility and ranking in search engine results, thereby increasing organic traffic and relevance.Speed
seatA unique user authenticating to access applications protected by Cloudflare Access or to use Gateway services.Cloudflare One
Secure Sockets Layer (SSL)SSL was a widely used cryptographic protocol for providing data security for Internet communications. SSL was superseded by TLS; however, most people still refer to Internet cryptographic protocols as SSL.SSL/TLS
Server Name Indication (SNI)

SNI allows a server to host multiple TLS Certificates for multiple websites using a single IP address. SNI adds the website hostname in the TLS handshake to inform the server which website to present when using shared IPs.

Cloudflare uses SNI for all Universal SSL certificates.

server response timeThe time it takes for a server to respond to a request from a user’s browser.Speed
Service Level Agreement (SLA)

An SLA is a contractual obligation for Cloudflare to maintain a specific level of service. Read the Service Level Agreement (SLA) for the Cloudflare Business plan. Enterprise customers refer to the Enterprise SLA provided with their contract.

service provider (SP)A service provider (SP) provides federated access to an application for a user from an identity provider (IdP).Cloudflare One
service tokenService tokens are generated by Cloudflare Access and enable automated systems or applications to access protected applications.Access, Cloudflare One
sFlowAn industry standard packet sampling protocol to monitor network devices.Magic Network Monitoring
SIEMA Security Information and Event Management (SIEM) solution collects, analyzes, and correlates data to help manage security incidents, detect anomalies, and meet compliance requirements.Area 1, Cloudflare One, WAF
SMBSecure Messaging Block (SMB) is a network file sharing protocol used for accessing files and services on a network.Cloudflare One
SMTPStands for Simple Mail Transfer Protocol. It is an Internet standard based on TCP/IP to send and receive email.Area 1
speed indexSpeed index is a web performance metric that quantifies how quickly a user perceives a webpage to load by measuring the visual progression of content rendering over time, providing a comprehensive assessment of the overall user experience during page loading.Speed
SSHSecure Shell (SSH) protocol allows users to connect to infrastructure remotely and execute commands.Cloudflare One
SSOSingle Sign-On (SSO) is a technology that combines multiple application logins into one, requiring users to enter credentials only once.Cloudflare One
static contentStatic content, like images, stylesheets, and JavaScript, remains the same for all users. It can be directly served from the cache without fetching from the origin server because it does not change without manual intervention.Cache
static routeA fixed configuration to route traffic through Anycast tunnels from Cloudflare global network to the customer’s locations.Magic Transit, Magic WAN
Subject Alternative Names (SANs)The SAN field of an SSL certificate specifies additional hostnames (sites, IP addresses, common names, subdomains, apex domains, etc.) protected by a single SSL Certificate.SSL/TLS
subnetAlso known as subnetwork. It refers to a network that is part of another network.Magic Transit, Magic WAN
synthetic testA synthetic test is an artificial simulation of user interactions and system behaviors designed to evaluate and measure the performance, responsiveness, and functionality of a website or application under controlled conditions.Speed
team domain

A unique subdomain assigned to your Cloudflare account, where secured applications are accessed by users; for example, <your-team-name>

Setting up a team domain is an essential step in your Cloudflare Zero Trust configuration. This is where your users will find the apps you have secured behind Cloudflare Zero Trust — displayed in the App Launcher — and will be able to make login requests to them.

Cloudflare One
team name

The customizable portion of your team domain, allowing you to personalize your Cloudflare Zero Trust configuration. You can view your team name in Zero Trust under Settings > Custom Pages.

team domainteam name

To learn about the consequences of changing your team name, refer to the FAQ.

Cloudflare One
TerraformTerraform is a tool for building, changing, and versioning infrastructure, providing components and documentation for Cloudflare resources.Cloudflare One, Terraform
threat score

The threat score is a score from 0 (zero risk) to 100 (high risk) classifying the IP reputation of a visitor.

IP reputation is calculated based on Project Honeypot, external public IP information, as well as internal threat intelligence from WAF managed rules and DDoS.

time to first byte (TTFB)Time to first byte (TTFB) is the duration measured from the initiation of a web page request to the moment the first byte of data is received by the user’s browser from the web server, indicating the server’s initial response time.Speed
time to interactive (TTI)Time to interactive (TTI) is a web performance metric that measures the time it takes for a web page to become fully interactive and responsive to user input, indicating when users can effectively engage with and use the page.Speed
time-to-live (TTL)The duration for which a cached copy of a resource is considered valid before it needs to be refreshed or revalidated.Cache
TLS (Transport Layer Security)TLS is a cryptographic protocol that ensures data security over a computer network, such as the Internet. It encrypts the data that is transmitted between a user’s computer and a web server.SSL/TLS
total blocking time (TBT)Total blocking time (TBT) is a web performance metric that measures the total amount of time between First Contentful Paint (FCP) and Time to Interactive (TTI) where the main thread was blocked for long enough to prevent input responsiveness.Speed
trafficTraffic is the data sent and received by visitors to a website. Cloudflare serves and protects this data as it passes through the Cloudflare network.Fundamentals
traffic steeringCloudflare evaluates your route’s health and steers traffic according to priorities defined by you and / or tunnel health.Magic Transit, Magic WAN
Tunnel certificateThe Cloudflare Tunnel software, cloudflared, generates a certificate for secure connections using a service token and an origin certificate.Cloudflare One, Tunnel
tunnel health-checkA probe sent by Cloudflare to check for tunnel health. If a tunnel is not considered healthy, Cloudflare reroutes traffic to one that is considered healthy.Magic Transit, Magic WAN
two-factor authentication (2FA)

Two-factor authentication (2FA) is a security process in which a user provides two different authentication factors to verify their identity. In addition to something you know, typically your password, 2FA adds an extra layer of security to user logins by requiring users to also present something they have, such as Yubikey or a one-time login code, or something you are, such as a fingerprint.

It adds an extra layer of security to user logins by requiring users to present two or more separate pieces of evidence (factors) that establish their identity.

Area 1, Fundamentals
uncached bandwidth (uncached egress bandwidth)Uncached bandwidth is the amount of bandwidth that is not cached and therefore is served from the origin. Uncached bandwidth is the sum of all EdgeResponseBytes where CacheCacheStatus does not equal hit, stale, updating, ignored, or revalidated.Cache
uncached requestsUncached requests are requests that are not cached and therefore are served from the origin server. Uncached requests are the sum of all requests where CacheCacheStatus does not equal to hit, stale, updating, or ignored.Cache
Universal SSL certificateBy default, Cloudflare issues — and renews — free, unshared, publicly trusted SSL certificates to all domains added to and activated on Cloudflare.SSL/TLS
URL normalizationThe process of modifying the URLs of incoming requests so that they conform to a consistent formatting standard.Rules
URL rewriteAn operation performed by a server that converts a source URL into a target URL.Rules
User risk scoreCloudflare Zero Trust user risk score ranks the likelihood of a user to introduce risk to your organization’s systems and data based on the detection of security risk behaviors. Risk scores add user and entity behavior analytics (UEBA) to the Zero Trust platform.Access, CASB, Cloudflare One, DLP, Gateway
User risk score levelCloudflare Zero Trust assigns a risk score of Low, Medium or High based on detections of users’ activities, posture, and settings. A user’s risk score is equal to the highest-level risk behavior they trigger.Access, CASB, Cloudflare One, DLP, Gateway
Virtual Private Network (VPN)A VPN extends a private network across a public network, enabling users to send and receive data across shared or public networks as if their computing devices were directly connected to the private network.Cloudflare One, Tunnel
WANStands for Wide Area Network. It refers to a computer network that connects groups of computers over large distances. WANs are often used by businesses to connect their office networks. The objective is to make each of the local area networks (LANs) be remotely connected and accessible.Magic WAN
WARP clientCloudflare Zero Trust customers can use the Cloudflare WARP application to connect corporate desktops to Cloudflare Gateway for advanced web filtering. It utilizes the security benefits of WARP technology.Cloudflare One
websiteA website is a collection of web pages and related content that is identified by a common domain name and published on at least one web server.Fundamentals
Zero Trust SecurityZero Trust Security is an IT security model that requires strict identity verification for every person and device accessing resources on a network.Cloudflare One
zoneA zone is a portion of DNS namespace that is managed by a specific organization or administrator.Fundamentals