Application Layer Ppt Forouzan Guide

: Used by the recipient to pull or manage messages from their mail server. Remote Logging (TELNET and SSH) :

Save this for your next exam! 💾

| Protocol | Port | Underlying Transport | Connection Type | |----------|------|----------------------|------------------| | HTTP | 80 | TCP | Connection-oriented | | FTP | 21,20 | TCP | Two connections | | DNS | 53 | UDP (usually) | Connectionless | | SMTP | 25 | TCP | Connection-oriented | application layer ppt forouzan

The Application Layer provides services to the user, not to the lower layers. : Used by the recipient to pull or

Forouzan categorizes protocols based on their functional utility: : not to the lower layers.

Tree structure showing root, TLD (.com, .edu), and subdomains.

: Uses two separate connections—one for control (commands/responses) and one for data transfer. Electronic Mail (SMTP, POP3, IMAP) :