Networking • Networking devices

Networking

• Networking devices

• The smallest in size of types of networks
• Up to 4-10metres

PAN (Personal Area Network)

• Network covering small geographical area
• Up to 10-100metres

LAN (Local Area Network)

• Network which is larger than a LAN but smaller than a WAN
• Up to 1km-100km

MAN (Metropolitan Area Network )

• Network covering a very large geographical area)
• Up to 100km to over 1000km

WAN (Wide Area Network)

• Networking devices

ADV’s of networking
Communication
Sharing
files
Sharing
devices,
such as printers
Sharing
Internet
connection
Sharing Software Licsense
Control Access
Data can be back up centrally

• Networking devices

DisADV’s of networking
To make a network it may cost a lot
Managing a large network may be difficult
Breakdown of devices can affect the whole network
Malware & Hacking can affect entire network
Networked devices must have following structure:
Hardware:
(-)LAN cards
(-)routers
(-)switches
(-)wireless routers
(-)cables
Software:
(-)operation and management of network
(-)operation of firewalls
(-)security applications
Services:
(-)DSL
(-)satellite communication channels
(-)wireless protocols
(-)IP addressing


LAN & WLAN
• A typical LAN consists of a number of computers and devices (such as printers) connected to hubs or switches.
• One of the hubs or switches is usually connected to a router and/or modem to allow the LAN to connect to the internet or become part of a WAN
• Wireless LANs (WLANs) are similar to LANs but there are no wires or cables.
• WAPs usually work to spread out network size and they are fixed at proper location. They use spread spectrum or infrared.
Network Models
Client-Server
Peer-to-peer