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
– 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
Packet Switched
 X 25


Frame Relay

ATM

SMDS
ISDN
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