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OSPF Questions

February 6th, 2017 Go to comments

Question 1

Question 2

Question 3

Question 4

Explanation

In order to become OSPF neighbor following values must be match on both routers:

+ Area ID
+ Authentication
+ Hello and Dead Intervals
+ Stub Flag
+ MTU Size

Therefore we need to adjust the MTU size on one of the router so that they are the same. Or we can tell OSPF to ignore the MTU size check with the command “ip ospf mtu-ignore”.

Question 5

Explanation

D is correct because these entries must match on neighboring routers:

Hello and dead intervals
Area ID (Area 0 in this case)
– Authentication password
– Stub area flag

In this case Ethernet0 of R1 has Hello and Dead Intervals of 5 and 20 while R2 has Hello and Dead Intervals of 10 and 40 -> R1 and R2 cannot form OSPF neighbor relationship.

Question 6

Explanation

The information available to a distance vector router has been compared to the information available from a road sign. Link state routing protocols are like a road map. A link state router cannot be fooled as easily into making bad routing decisions, because it has a complete picture of the network. The reason is that unlike the routing-by-rumor approach of distance vector, link state routers have firsthand information from all their peer routers. Each router originates information about itself, its directly connected links, and the state of those links (hence the name). This information is passed around from router to router, each router making a copy of it, but never changing it. The ultimate objective is that every router has identical information about the internetwork, and each router will independently calculate its own best paths.

Reference: http://www.ciscopress.com/articles/article.asp?p=24090&seqNum=4

Comments (11) Comments
  1. supunit21
    February 6th, 2017

    where are questions?

  2. Lucky
    February 8th, 2017

    Questions are Missing, Admin ?

  3. kk
    February 26th, 2017

    where are the questions ??

  4. Mr. Fisher
    March 10th, 2017

    There is no questions, where is it?!

  5. skyflakes
    March 12th, 2017

    find in other links, there is a pdf file in this 1. maybe in the share your ccna experience page.

  6. banay
    March 14th, 2017

    @supunit21 @Lucky @kk
    here you the link for the Questions

    http://www.autismtoday.com/?page=ccna-questions-and-answers

  7. Anonymous
    March 16th, 2017

    Passed CCNA 200-125
    Studied Latest dumps 171+182+191 Questions files + Labs from below link
    https://docs.google.com/uc?export=download&id=0BwepsouMuqCjUnBBcFpWaVFFcEU

  8. waqas
    April 18th, 2017

    Plz some1 forward me 171 & 191 qs dums at waqas.uetpeshawar at gmail dot com. thanks in advance

  9. waqas
    May 5th, 2017

    passed ccna exam today (886/1000), nothing was really difficult.
    two labs there
    1). ACL
    2). EIGRP (little changes in topo)
    i read a lot of dump’s (545/719/182/266/473) but i would suggest prepare 719 and just go through 266, most of the questions there.
    GOOD LUCK!!!!

  10. Whoa!!!
    May 6th, 2017

    Q4 why answer is E and not D since as the explanation said, MTU and cost must match to established adjacencies. And AFAIK the default MTU is 1500. Need comment please

  11. Whoa!!!
    May 6th, 2017

    I mean why E instead of C?