CS2005 Networks and Operating Systems Application Layer II

Flashcards covering key concepts of web services, HTTP, and electronic mail from the CS2005 Networks and Operating Systems lecture.

Hypertext Transfer Protocol (HTTP)

The web's application layer protocol using port 80, defined in RFC 1945 and RFC 2616.

Stateless protocol

A type of protocol where each request is treated independently, as in HTTP.

Client-server protocol

A protocol where a client requests resources from a server, which then provides the resources.

Non-persistent HTTP

Connection type where at most one object is sent over a TCP connection before closing it.

Persistent HTTP

Connection type allowing multiple objects to be sent over a single TCP connection.

Round-trip time (RTT)

The time for a small packet to travel from client to server and back, including various delays.

Cookies

Data sent by a server to a web browser that is stored and sent back to the server to maintain user state.

Web cache

A server that temporarily stores copies of requested web objects to reduce response time and network traffic.

Simple Mail Transfer Protocol (SMTP)

A protocol used for sending email messages between servers, operating over TCP using port 25.

Post Office Protocol version 3 (POP3)

A mail access protocol for retrieving messages from a mail server, involving authorization, transaction, and update phases.

Internet Mail Access Protocol (IMAP)

A mail access protocol that allows for more complex management of messages stored on a server.