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The remote networks 172.16.10.0, 172.16.20.0, and 172.16.30.0 are accessed through the Central router's serial 0/0 interface.

The network administrator has found the following problem.

74
The remote networks 172.16.10.0, 172.16.20.0, and 172.16.30.0 are accessed through the Central router's serial 0/0 interface.
No users are able to access 172.16.20.0. After reviewing the command output shown in the graphic, what is the most likely cause of the problem?

A. no gateway of last resort on Central
B. Central router's not receiving 172.16.20.0 update
C. incorrect static route for 172.16.20.0
D. 172.16.20.0 not located in Central's routing table


Answer : C

Explanation :
A static route for 172.16.20.0 is mapped to 172.16.150.15.

The route to 172.16.150.0 is mapped to Fa0/0. So if a data from Fast Ethernet 0/0 to 172.16.20.0 network raised, then Central router will loop the data to Fast Ethernet 0/0 itself.

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