TCP/IP

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What is a protocol

TCPIP Stack

Application layer

Transport layer

Network layer

Link layer

Ports

Why we need them

Well known port numbers

Socket

Protocols

http

Hyper Text Transfer Protocol, most often found at the beginning of URLs, is used to transfer an user to a web address that is specified via the domain.

https

A verified, secure version of HTTP. This ensures the user that the website they are on is safe and well protected.

ftp

File Transfer Protocol.

SSH

Secure Shell protocol. Designed for operating securely over an unsecure network.

telnet

Allows a user to log into a remote computer over the interlinking network.

pop3

Post Office Protocol, version 3.

smtp

Simple Mail Transfer Protocol.

imap