Network Overview

Network is a group of computers connected together to exchange the data

Classification

	Local Area Network (LAN)	Metropolitan Area Network (MAN)	Wide Area Network (WAN)
Scale	< 1 km	< 50 km	hundreds of km
Characteristics	rapid file sharing, printing, internet access	sharing data between offices, region	communication between states, countries, etc.
Example	a network within home, office, building, campus	a network that spans a town, city, regional area	a networks that spans multiple states or countries

Table 1: Network Classification

Network attribute

Network Topologies

a. Bus

With bus topology, devices in LAN will connected to one shared medium. Needed a long cable, all the network traffic travel along this cable.

b. Star

Devices connected to a network device at the center

c. Ring

Devices within ring topology will connect to its neighbors. This type of topology less common nowadays as we wont encounter it in real life

d. Mesh

Each devices in mesh topology connect to multiple devices but sometime not connect to all devices.

2. MAN topology

IEEE 802.6 or DQDB (Distributed Queue Dual Bus) is design to use for MAN network.

Internet

Internet is a network of networks, many LANs and WANs connected together to create a single world-wide network.

Working based on standards:

CyberSecurityPassion