HTTP Flashcards
______ is the main application layer communication protocol of the world wide web
HTTP
A web page is made up of many objects including…
images, text, audio, video clips, animations, applets, and other components
An HTML file includes a _________ for each of the objects on the page
reference
What is an agent?
A browser
Agents use ______ to communicate across the internet
HTTP
To get the objects on an HTML page, the client must request the objects from the ______
servers
HTTP is used to send ______ from a browser to a web server
requests
What are the steps to access an object?
- Locate web server
- TCP connection is made
- Client sends a HTTP request for the object to the server (or a series of requests)
- Server processes request and sends a reply
- Client adds object to page and requests next object
In the original version of HTTP, a new ___ ________ would be made for every single object
TCP connection
Describe a non-persistent connection using SYN, ACK, and FINS
-A sends SYN (TCP req)
-B sends SYN ACK (Accept TCP)
- A sends ACK and HTTP GET
- B sends object
To close connection
- B sends FIN
- A sends SYN ACK
- B sends ACK
What is the round trip travel time?
The time it takes to propagate from A to B to A
Each non-persistent connection takes _ RTTT to make and break the connection
3
The default in HTTP1.1 is a ________ connections
persistent
Persistent connections close after a ________ time with no activity
reasonable
In a persistent connection, A must also send an ___ when it receives an object
ACK
