Introduction to network

Dr. Eng. Mostafa Elgamala

RHCE, CCNA, CCAI, MCSA, CSCU, LDP

Why computer network? Sharing in resources, deliver communication services.

Classification of networks:1- Size

2- Topology

3- Network Model (network architecture):

Peer to peer

Client server based

Network components:

1- Computers:

2- NIC: Network Interface Card

3- NOS: ex. Windows, Unix, Linux

4- Media

5- Network devices: •Switch

•Router

•Firewall

•Access point

•IP telephony

•Modem

Network terminologies:

Port number: Well-known ports: 0:1023

Randomly selected ports (dynamic): 1024: 65535

Network communication modes: Connection oriented: slow, reliable

Connection-less: fast, not reliable

TCP/IP model

TCP/IP model

TCP/IP data flow