WANS and ROUTERSWANS and ROUTERS

Presented by

Les McLellan

Dean Whittaker

Sandy Workman

WANS and ROUTERS What is a WAN? WAN Devices WAN Standards WAN Technologies What is a Router ? Summary

What is a WAN?A Data Communications NetworkNetwork Services provided by PTO’sRelatively broad geographic areaSerial connections of various types and

speedsProvide full and part time connectivityTechnologies function at the lower three

layers of the OSI Model

Wide Area Network Devices

Routers

WAN Bandwidth Switches

Modems

Comms Servers

WAN Standards Defined and Managed by recognized

authorities

WAN’ s use the OSI reference Model

WAN Physical Layer standards specify the interface

WAN data Link protocols

The WAN Physical Layer EIA/TIA 232 EIA/TIA 449 V 24 V 35 X 21 G 703 EIA-530

Serial Interface Adaptor Cables

The WAN Data Link Layer

High Level Data Link Control (HDLC) Frame Relay Point to Point Protocol (PPP) Serial Line Interface Protocol (SLIP) Cisco / IETF ISDN

WAN Technologies Dedicated Lines

Switched Connections (Circuit Switched) (Packet Switched)

Other WAN Technologies

Dedicated Lines T1 – 1.544 Mbps

T3 – 44.736 Mbps

E1 – 2.048 Mbps

E3 – 34.368 Mbps

Other Bandwidths are also available

Switched Connections

Circuit Switched POTS

ISDN

Packet Switched X 25

Frame Relay

ATM

SMDS

Other WAN Services Dial Up Modems

Cable Modems

Wireless

ROUTERS Internal Components

The Function of a Router

WANS and ROUTERS Summary

Data Communication Networks that operate over a large area using Serial Links

Routers are active intelligent nodes used to manage a network

WANS and ROUTERS

THE END