1 © 2003, cisco systems, inc. all rights reserved. ccna 2 v3.0 module 1 wans and routers
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1© 2003, Cisco Systems, Inc. All rights reserved.
CCNA 2 v3.0 Module 1 WANs and Routers
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222© 2003, Cisco Systems, Inc. All rights reserved.
Objectives
• WANs
• Routers
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333© 2003, Cisco Systems, Inc. All rights reserved.
Introduction to WANs
• A wide-area network (WAN) is a data communications network spanning a large geographic area such as a state, province, or country.
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WAN Devices
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555© 2003, Cisco Systems, Inc. All rights reserved.
WAN Services
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Data Link Encapsulations
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Internal Configuration Components
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Routers Connected by WAN Technologies
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Network Layer Path Determination
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101010© 2003, Cisco Systems, Inc. All rights reserved.
Internetwork Routers
• Any internetwork must include the following:
Consistent end-to-end addressing
Addresses that represent network topologies
Best path selection
Dynamic routing
Switching
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Academy Approach to Labs
• In the academy lab, all the networks will be connected with serial or Ethernet cables and the students can see and physically touch all the equipment.
• Devices that make up the WAN cloud are simulated by the connection between the back-to-back DTE-DCE cables.
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Router Internal Components
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Router Internal Components
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Internal Components of a 2600 Router
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External Connections on a 2600 Router
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Router External Connections
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Computer or Terminal Console Connection
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Modem Connection to Console or Auxiliary Port
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Connecting Console Interfaces
1. Configure terminal emulation software on the PC for the following:
The appropriate com port
9600 baud
8 data bits
1 stop bit
No parity
No flow control
2. Connect a rollover cable to the router console port (RJ-45 connector).
3. Connect the other end of the rollover cable to the RJ-45 to DB-9 adapter
4. Attach the female DB-9 adapter to a PC.
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Connecting LAN Interfaces
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Router Serial WAN Connectors
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DCE Serial Connections