1. WANs and Routers
Module 1: WANs & Routers

2. WAN Services
WANs provide for the exchange of data packets/frames ___________________________ _______________________________________
A WAN interconnects ____________________ _______________________________________
WANs operate at the _______________________ of the OSI model
____________________ Such devices include...

3. Routers Two main functions: Routers can serve as...
____________________ – serving primarily as paths for traffic from one network to the next within same AS
Etc.

4. Modems
Interface with voice-grade connection in order to convert analog signal to digital.
Also called

5. WAN Standards
What layers of the OSI model do WAN standards describe?

6. WAN Physical Layer
Protocols that describe how to provide electrical, mechanical, operational, and functional connections for WAN services.
Describes the

7. WAN Physical Layer
Typically, the ________________________ ________________________________________
In this model, the services offered to the DTE are made available through a modem or a CSU/DSU.

8. WAN Physical Layer
Several physical layer standards specifying the interface between the DTE & DCE are...
EIA/TIA-232
EIA/TIA-449
V.24
Etc.

9. WAN Data-Link Layer
WAN data link protocols describe how
More to come…

10. Router- Specialized computer
Contains components of any computer
Also contains an operating system

11. Router Basics- Internal Components
RAM
NVRAM
Flash
ROM
Console
Interfaces
Auxiliary

12. RAM
Stores...
Etc

13. NVRAM
Stores

14. Flash
EEPROM (Electronically Erasable Programmable Read-Only Memory)

15. ROM Contains Upgrades require And
____________- trimmed down version of the IOS
Upgrades require

16. Interfaces
AKA
Attached to the

17. Connections on a router
____________ interfaces
________________________________________________________________________
NON-NETWORK INTERFACES

18. Management Ports
One of these two ports is _____________ for the initial configuration of the router
Console is the best
_______________________________________
See demo for how to connect the console (rollover) cable to the computer and the router

19. LAN and WAN interfaces LAN WAN Would a cross-over ever be appropriate?
A straight through cable is used to connect to a switch or hub
Would a cross-over ever be appropriate?
WAN
Variety of different options for connection

20. Labs For next class, please have the following labs: Homework
Connecting Console Interfaces
Connecting Router LAN Interfaces
Connecting WAN Interfaces
Homework
Pre-read labs
Read Mod 1