WANs and Routers Module 1: WANs & Routers.

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Presentation transcript:

WANs and Routers Module 1: WANs & Routers

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...

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

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

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

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

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

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

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

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

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

RAM Stores... Etc

NVRAM Stores

Flash EEPROM (Electronically Erasable Programmable Read-Only Memory)

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

Interfaces AKA Attached to the

Connections on a router ____________ interfaces ________________________________________________________________________ NON-NETWORK INTERFACES

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

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

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