Week FourRouda’s Sections

LAN - Local Area Network◦ small area (e.g. a building)◦ small number of machines

WAN - Wide Area Network◦ large area◦ usually a collection of LANS

Other Networks◦ PAN - personal area network◦ MAN - metropolitan area network

LAN - Local Area Network◦ small area (e.g. a building)◦ small number of machines

WAN - Wide Area Network◦ large area◦ usually a collection of LANS

Other Networks◦ PAN - personal area network◦ MAN - metropolitan area network

Bus Network Token Ring Mesh Star

Bus Network Token Ring Mesh Star

Bus Network Token Ring Mesh Star

Bus Network Token Ring Mesh Star

◦Ethernet is the most common type of LAN

◦Advantage: Fault Tolerant

◦Disadvantage: lots of wires

SwitchRouter Bridge, Repeater, ... Printers Servers

Twisted-Pair◦ used in your house for the phone◦ used by a DSL Modem

Coaxial Cable◦ used in your house for cable TV◦ used by a Cable Modem

Radio / WiFi

Fiber OpticQ: Which is better, Cable or DSL?

A: It depends on your location.

Q: Which is better, Cable or DSL?

A: It depends on your location.

Step One: Buy a Router

Step Two: Call your local cable or phone company

Step Three : Run software to configure your router:security (password, pick a security protocol, etc)max number of usersvisible or hidden

Wireless FormatsA•not on same frequency as phones•short range

B and G•longer range and faster than A•cordless phones can interfere•B is common in airports, etc.

N•fastest, good range•not compatible with B and G

LAN◦ probably Ethernet

WAN◦ google "VPN Providers"◦Virtual Private Network◦ Encrypted Data is sent between office locations

using a standard internet connection

Ethics◦how safe is the internet?

Legal Issues◦can my employer read my email?

Security◦what is a firewall?