Two routers named Atlanta and Brevard are connected via their serial interfaces as illustrated, but
they are unable to communicate. The Atlanta router is known to have the correct configuration.
Given the partial configurations, identify the fault on the Brevard router that is causing the lack of
connectivity.
A.
incompatible IP address
B.
insufficient bandwidth
C.
incorrect subnet mask
D.
incompatible encapsulation
E.
link reliability too low
F.
IPCP closed
Explanation:
Because Interface Serial 0 of Atlanta Router has 192.168.10.1 And Interface Serial 1 of Router
Brevard has 192.168.11.2. These are from different network.
The answer does not match with the explanation.
The correct answer is D. Incompatible Encapsulation. The IP addresses in this particular illustration are correct. There are other similar questions where the illustration shows a different IP address for Brevard
correct answer is A . router will not accept two interfaces which have ip in the same subnet
Someone needs to hit the books with a sledgehammer.
Links between routers have belong to the same subnet or they won’t communicate.
So S0 in Atlanta has 192.168.10.1/24 and S1 in Brevard has 192.168.10.2/24. They are valid addresses in the same subnet, so no issue there.
The links have different encapsulation methods that, as we all should know, prevent communication.
Therefore, D.