Remember HTTP
Full name: Hypertext Transfer Protocol
Memory aid: Hypertext Travels through a Protocol.
Plain HTTP does not provide transport encryption.
Study area: Protocols & logical ports · Batch 2
Relevant study for: CompTIA Network+ N10-009 · Cisco CCNA 200-301 · CompTIA A+ Core 1 220-1201 · CompTIA Security+ SY0-701 · ISC2 CISSP 2024 outline
Practice with exam flashcards →Legacy & Roots / Knowledge library
HTTP
the protocol every web request rides on
Why learn HTTP?
Everything above (REST, APIs, browsers) is HTTP semantics. Debugging production without knowing status codes, headers, and caching is flying blind.
Where it came from
Began as a one-line GET protocol. Grew through 1.1's keep-alive, 2's multiplexing, and 3's QUIC — each version solving the last one's bottleneck.
Build your understanding
Work through these exercises in order. Try the task before opening a reference.
- Explain GET vs POST vs PUT vs PATCH.
- List 8 status codes you must know.
- Inspect a request fully in devtools.
- Explain caching headers (ETag, max-age).
- Describe what HTTPS adds and how TLS handshakes.
Documentation and sources
- Official documentation / standards body (www.rfc-editor.org)