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Chapter 14 - Configuring OSPF

Cisco & IP Addressing
Louis D. Rossi, Louis R. Rossi and Thomas Rossi
  Copyright © 1999 The McGraw-Hill Companies, Inc.

Answers
  14.1:
Router_C(config)#router ospf 100
Router_C(config-router)#network 10.10.3.33 0.0.0.0 area 0
Router_C(config-router)#network 172.16.0.14 0.0.0.0 area 0
  The above is just one solution.
  The following command line would also work because in reality all the networks 10.0.0.0 are in area 0.
Router_C(config-router)#network 10.0.0.0 0.0.0.0 area 0
  14.2:
  All routes would be intra-area routes. Of course these would be directly connected networks and possibly external networks if there were an external autonomous system.
  Only intra-area routes and a static route pointing to the gateway of last resort
  14.4: Router_C Configuration Statements
Router_C(config)router ospf 100
Router_C(config-router)network 172.16.1.10 0.0.0.0 area 0
Router_C(config-router)network 172.16.1.21 0.0.0.0 area 3
Router_C(config-router)network 172.16.1.25 0.0.0.0 area 4
Router_C(config-router)area 3 stub no-summary
Router_C(config-router)area 4 stub no-summary
Router_C(config-router)area 3 range 10.1.16.0 255.255.248.0
Router_C(config-router)area 4 range 10.1.24.0 255.255.248.0
  14.5: 100,000,000/56,000 = 1786
  14.6: A “totally stubby” area will hide both interarea routes and external routes. A “stub” area will hide only external routes.
  14.7: True
  14.8: False
  14.9: The administrative distance of OSPF is 110.
  14.10: False; by definition an ABR is connected to multiple areas.
  14.11: False; backbone routers must be connected to Area 0.
  14.12: True

 


 
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