|Application Layer||Telnet, SSH, FTP, SMTP, HTTP, NFS, SNMP|
|Presentation Layer||JPG, PNG, GIF, MPEG, ASCII, CSS, HTML|
|Session Layer||RPC, SCP, TLS|
|Transport Layer||TCP, UDP|
|Network Layer||IP V4, IP V6, ICMP, IPsec|
|Data Link Layer||MAC, PPP, ATM, HDLC, Frame Relay|
|Physical Layer||Ethernet, ISDN, USB, DSL|
What is Telnet?
a network protocol that allows a user on one computer to log into another computer that is part of the same network.
What is SSH?
SSH, also known as Secure Shell or Secure Socket Shell, is a network protocol that gives users, particularly system administrators, a secure way to access a computer over an unsecured network.
What is FTP?
What is SMTP?
Simple Mail Transfer Protocol.