Personal Area

Network (PAN)

Example: Bluetooth headset

connecting to a mobile phone.

Local AreaNetwork

(LAN)

Example: Computers in the

computer lab that connect to each other and

printers.

Wide AreaNetwork (WAN)

Example: Company computers

connecting to each other from

all over the world.

PAN, LAN or WAN?

The Internet

Network Topologies

Network Protocols

TCP/IPIPX/XPSAppleTalk

Novell

NetBIOS

SNA

Peer

Peer-to-Peer Client-Server

Network Architectures

Network Cabling

• Unshielded Twisted Pair

• Shielded Twisted Pair

• Thick Coaxial Cable

• Thin Coaxial Cable

• Fiber Optic Cable

• Wireless Communications

Network Equipment - Hub

Connects Computers on a LAN

Network Equipment - Switch

Connects Computers on a LAN – Smart Hub

Network Equipment - Router

Connects Networks

LANWAN

Network Equipment - Firewall

Connects Networks – Smart Router