WANS 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 Network  Network Services provided by PTO’s  Relatively broad geographic area  Serial connections of various types and speeds  Provide full and part time connectivity  Technologies 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 – Mbps  T3 – Mbps  E1 – Mbps  E3 – 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