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CCNA Question - Routing Protocol theory

CCNA, CCDA, CCNP, CCDP, CCIP, CCVP and CCIE

CCNA Question - Routing Protocol theory

Postby Guest » Fri Nov 09, 2007 7:33 pm

Chapter 8 - Routing Protocol Theory

Question 9:  An internetwork is using a link-state routing protocol.  the routers have flooded all LSAs, and the network is stable.  Which of the following describes what the routers will do to reflood the LSAs?

 

a- Each router refloods each LSA using periodic timer that has a time similar to distance vector update timers.

b- Each router refloods each LSA using a periodic timer that is much longer than distance vector update timers.

c- The routers never reflood the LSAs as long as the LSAs do not change.

d- The routers reflood all LSAs whenever one LSA changes.

 

Now I picked "b and d" but the answer was "b" only.  Can some one explain why  not "d" also?  Because whenever an LSA changes routers reflood.

Guest
 

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Re:CCNA Question - Routing Protocol theory

Postby Guest » Fri Nov 09, 2007 7:45 pm

Your right, when an LSA changes it will be flooded out again. But question d is -

 

d- The routers reflood all LSAs whenever one LSA changes.

 

the routers do not reflood ALL LSAs, only the LSAs that have changed.

 

Jon

 

Cisco are currently donating money to the Haiti earthquake appeal for every rating so please consider rating all helpful posts.

Guest
 

Re:CCNA Question - Routing Protocol theory

Postby Guest » Fri Nov 09, 2007 8:47 pm

Aha, that is right.  I gotta be careful with the wording.  Thank you.

Guest
 

Re:CCNA Question - Routing Protocol theory

Postby Guest » Fri Nov 09, 2007 9:34 pm

No problem, glad to help.

 

Its all down to the wording with Cisco exams

 

Jon

Guest
 



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