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

https

ftp

SSH

Secure SHell Protocol. Designed for operating securely over an unsecure network.

telnet

pop3

smtp

imap

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