Notes/UNB/Year 4/Semester 2/CS3873/2024-01-29.md

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2024-01-29 12:15:02 -04:00
Lecture Topic: HTTP
# Conditional Get
## Last-Modified
You can check the Last-Modified header to only get contents if the contents are newer than the contents of the cache
## ETag
Use the hash of an object to check for modification to solve cache invalidation problem
## TCP and HTTP
HTTP runs on top of TCP
- Client initiates TCP request to server
- Server accepts TCP connection
- Clint confirms request
- Three way handshake
## Non-persistent HTTP
RTT = Round trip time