what could be the cause of this problem?

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

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

A.
The address of SwitchA is a subnet address.

B.
HostA is not on the same subnet as its default gateway.

C.
The Fa0/0 interface on RouterA is on a subnet that can’t be used.

D.
The Fa0/0 interface on RouterB is using a broadcast address.

E.
The serial interfaces of the routers are not on the same subnet.

Explanation:
A subnet mask of /27 (255.255.255.224) will have 3 bits used for the network portion and 5 bits for
the host portion. This will create 2^3 = 8 networks with 2^5 = 32 hosts per network. From this we
know that the number of subnets will be a multiple of 32, making the subnets:
1. 192.168.1.0
2. 192.168.1.32
3. 192.168.1.64
4. 192.168.1.96
5. 192.168.1.128
6. 192.168.1.160
7. 192.168.1.192
8. 192.168.1.224
From this, we can see that the serial interface of router A lies within the second network shown
above while the serial interface of Router B lies within the third. For directly connected routers
they should be in the same IP subnet.



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