Cisco 200-125 Exam

Refer to the exhibit. HostA cannot ping HostB. Assuming routing is properly configured, what is the cause of this problem?

  • A. HostA is not on the same subnet as its default gateway.
  • B. The address of SwitchA is a subnet address.
  • C. The Fa0/0 interface on RouterA is on a subnet that can’t be used.
  • D. The serial interfaces of the routers are not on the same subnet.
  • E. The Fa0/0 interface on RouterB is using a broadcast address.
Answer: Option D.
Explanation: 

Now let’s find out the range of the networks on serial link:
For the network 192.168.1.62/27:

Increment: 32 –

Network address: 192.168.1.32 –

Broadcast address: 192.168.1.63 –
For the network 192.168.1.65/27:

Increment: 32 –

Network address: 192.168.1.64 –

Broadcast address: 192.168.1.95 –
-> These two IP addresses don’t belong to the same network and they can’t see each other

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