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Web protocols are shared rules that let devices exchange information, but they do different jobs at different layers. HTTP defines the meaning of web requests and responses; transport protocols carry that data; TLS protects communications; and protocols such as WebSocket and WebRTC support different kinds of ongoing, real-time exchange. A single browser interaction can rely on several of these working together.
What is a web protocol?
A protocol is an agreed set of rules for communicating: it specifies how participants format, send, receive, or protect information. “Web protocol” is an umbrella term, not the name of one protocol or a complete inventory of everything the Internet uses.
Protocols operate at different levels. An application protocol describes what a message means; a transport protocol moves data between endpoints; and a security protocol can authenticate participants and protect messages. The layers cooperate rather than compete. For example, HTTP/3 uses HTTP semantics over QUIC, while TLS provides cryptographic protection in supported communication arrangements.
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1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitchesThe IETF publishes technical documents in the RFC series, covering Internet foundations and protocols including TLS, QUIC, WebRTC, email, and DNS. An RFC is a publication in a series, not a guarantee that the document is a final Internet Standard. Check a specification’s status and updates when its current standing matters. IETF: About RFCs.
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How do the protocol layers fit together?
Think of a web exchange as a set of responsibilities, not a single choice between protocol names. The browser and server use an application protocol to define the exchange. A transport carries the data, and security mechanisms protect the communication. Different application needs can call for different arrangements.
- Application meaning: HTTP defines web request-and-response semantics.
- Transport: QUIC carries application protocol information over a connection and provides streams and transport functions.
- Security: TLS is designed to protect client/server communication and can authenticate peers.
- Specialized exchanges: WebSocket supports two-way messaging; WebRTC is a suite for browser real-time communications.
These roles matter when comparing protocols: two names may refer to different layers or solve different communication problems, so they are not necessarily alternatives.
What does HTTP do?
HTTP is the web’s application protocol for request-and-response semantics. It defines what web requests and responses mean; it does not, by itself, describe every transport or security mechanism that may carry or protect them.
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That distinction helps make sense of HTTP/3. It retains HTTP semantics while using QUIC as its transport foundation, rather than TCP. HTTP/3 adds framing on QUIC streams; QUIC supplies the connection and stream behavior on which those HTTP messages travel. IETF RFC 9114: HTTP/3.
What is the difference between HTTP and HTTPS?
HTTPS refers to HTTP communication protected with TLS. TLS is designed to guard client/server communication against eavesdropping, tampering, and message forgery. It also provides confidentiality and integrity protections and allows endpoints to authenticate peers. A secure connection therefore involves more than a lock icon or a different label: the application exchange and its cryptographic protection have distinct roles.
Eric Rescorla, author of the IETF TLS 1.3 specification, summarizes its purpose: “TLS allows client/server applications to communicate over the Internet in a way that is designed to prevent eavesdropping, tampering, and message forgery.” The current TLS 1.3 specification identified here is RFC 9846, published in July 2026; it obsoletes RFC 8446. IETF RFC 9846: TLS 1.3.
What is QUIC, and what is HTTP/3?
QUIC is a secure, general-purpose transport protocol. It is connection-oriented and supports flow-controlled streams, low-latency connection establishment, and migration between network paths. It is a transport foundation, not another name for HTTP. IETF RFC 9000: QUIC.
HTTP/3 maps HTTP semantics onto QUIC. HTTP supplies the meaning of web requests and responses, while QUIC supplies the transport connection and streams. QUIC provides reliable, in-order delivery within each stream, flow control, confidentiality, integrity, and peer authentication. This is why HTTP/3 should not be described as HTTP over TCP: its transport is QUIC. IETF RFC 9114: HTTP/3.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What is WebSocket used for?
WebSocket is for ongoing, two-way messaging between browser-side code and a remote host that supports it. Its opening handshake is followed by framed messages, and the protocol is layered over TCP. The secure URI form, wss, runs WebSocket over TLS. This pattern fits applications that need messages to flow in both directions over an ongoing connection, rather than repeatedly initiating isolated page requests. IETF RFC 6455: The WebSocket Protocol.
What is WebRTC?
WebRTC is a suite of protocols for real-time communications in browser applications, including audio and video calls, web conferencing, and direct data transfer. It is not one protocol or a general replacement for HTTP. Browser APIs coordinate its use, and service signaling is part of establishing communication. Relays can be involved to work with network address translation, firewalls, or other connectivity constraints, so a WebRTC connection is not necessarily direct between peers.
Eric Rescorla, author of RFC 8827, describes it as “a protocol suite intended for use with real-time applications that can be deployed in browsers — ‘real-time communication on the Web’.” The IETF specifications cover the WebRTC overview, transport interactions, and security architecture. IETF RFC 8825: WebRTC Overview; IETF RFC 8835: WebRTC Transport; IETF RFC 8827: WebRTC Security Architecture.
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| Protocol | Primary job | Communication pattern | Transport or dependencies | Security role |
|---|---|---|---|---|
| HTTP/3 | Carry HTTP request-and-response semantics | HTTP exchanges using streams | QUIC | QUIC provides confidentiality, integrity, and peer authentication |
| WebSocket | Provide framed messaging between browser code and an opted-in host | Two-way messaging over an ongoing connection | TCP; wss uses TLS |
TLS protects the secure wss form |
| WebRTC | Support real-time browser communications, including media and data | Real-time peer communication; relays may be involved | A protocol suite coordinated through browser APIs and service signaling | Its security architecture addresses peer authentication and communications security |
These protocols are not interchangeable options for the same job. HTTP/3 is HTTP over QUIC; WebSocket is bidirectional framed messaging over TCP; WebRTC is a broader suite for real-time media and data use cases.
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