EGCP-4310 - Exam 1 - 06 HTTP Basics and Message Exchange

What is HTTP?

Hypertext Transfer Protocol

What Web architecture does HTTP use?

Client-server request-response architecture

What implements the HTTP client?

Web browser

What is a Web object?

A URL-addressable file

What does a base HTML file contain?

References to other Web objects

What two parts make up a URL?

Hostname and path name

Which transport protocol does HTTP use?

TCP

Why is HTTP called stateless?

Server stores no request history

What closes after one object nonpersistent HTTP?

The TCP connection

What does persistent HTTP reuse?

TCP connection

Nonpersistent HTTP response time per object?

Two RTTs plus transmission time

What does RTT measure?

Client-server-client small-packet travel time

What first line starts an HTTP request?

Request line

What fields appear in a request line?

Method, URL, HTTP version

Which HTTP method retrieves an object?

GET

Which HTTP method sends form-body data?

POST

Which HTTP method returns headers only?

HEAD

Which HTTP method uploads an object?

PUT

What does HTTP status 200 mean?

Request succeeded

What does HTTP status 301 mean?

Object moved permanently

What does HTTP status 404 mean?

Requested object was not found