الرجاء المساعدة في حل هذا السؤال ospf

[tikka]

ارجو من الاخوة الاعزاء المساعدة في حل هذا السؤال مع شرح الاجابة ، وجعلها الله في ميزان حسناتكم..................

[intel2000]

try to put the config for (option D) that was not shown!! only half of ur solutions r displayed!0

[tikka]

dear intel2000

the pass4sure engine show that anser C is the correct anser , but i dont know how............


can U or anybody explain it to me...

plz


thanx

[intel2000]

Something to note:
-----------------------------
the network to the ISP is 10.10.2.12/30 ----> has the 2 IPs, .13 and .14
the network to north Router is 10.10.2.16/30 ---> has the 2 IPs .17 and .18
the network to west Router is 10.10.2.20/30 ---> has the 2 IPs .21 and .22
the network to est Router is 10.10.2.24/30 ---> has the 2 IPs .25 and .26
the network to south Router is 10.10.2.28/30 ---> has the 2 IPs .29 and .30

having all this info. we can conclude the following:


Option A is incorrect because the wildcard mask does not refer to the correct networks (or interfaces). It's too broad and it's the wrong network! 10.0.0.0 /16 in this case.

Option B is incorrect because the wildcard mask does not refer to the correct networks (or all interfaces). It's too narrow and it's the wrong network! Only 10.10.2.0 to .16 in this case.

Option C is correct because the wildcard mask encompasses all the networks (and interfaces) in this case! It's from 10.10.2.16 to .31

Option D is not shown so i will leave it out!

Hope this helps!

[tikka]

ok i get your point but, what's the meaning of /30 , do U observe it ...

i know before that /28 have a blocksize of 16 255.255.255.240

plz go ahead

thax for your help

[intel2000]

i frankly don't know what u r trying to say!! /30 is used to reserve 2 IPs for 2 devices and is usually used in a point-to-point link. So where is the /28 here? i can't see that in ur topology!0