TCP/IP

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Contents

1 What is a protocol
2 TCPIP Stack
3 Ports
- 3.1 Why we need them
- 3.2 Well known port numbers
4 Socket
5 Protocols
- 5.1 http
- 5.2 https
- 5.3 ftp
- 5.4 SSH
- 5.5 telnet
- 5.6 pop3
- 5.7 smtp
- 5.8 imap

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

https

A verified, secure version of HTTP.

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 3

smtp

imap

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