Refer to the network diagram in the exhibit. Host A is configured with an incorrect default gateway. All other computers and the Router are known to be configured correctly.
Which of the following statements is TRUE?
A. Host C on Network A cannot communicate with Host A on Network A.
B. Host A on Network A can communicate with all other hosts on Network A.
C. Host A on Network A can communicate with Router R.
D. Host C on Network A cannot communicate with Router R.
E. Host D on Network B cannot communicate with Host B on Network A.
Correct Answers: B, C
Explanation:
Host A on Network A can communicate with all other hosts on Network A and with Router R. To communicate with local hosts and the interface of Router R (which are all in the same subnet) only a correct IP address is reqired. If the default gateway of Host A is incorrect, then it will not be able to communicate with any host on the other side of the router, which includes Network B in the diagram. Packets from hosts on Network B will reach Host A on Network A without any problem, because they possess the correct address of the default gateway or router, but Host A will send the packet to a dead end because Host A has an incorrect default gateway. On the other hand, Host A does not require a default gateway to communicate with other hosts on same network.
Host C on Network A WILL be able to communicate with Host A on Network A , even though Host A has an incorrect default gateway because Host A and C are in the same subnet, which requires no use of the of the gateway or router..
Host C on Network A WILL be able to communicate with Router R because Host C has the correct default gateway address which is the address of Router R. Host D on Network B WILL be able to communicate with Host B on Network A because both hosts have a correct default gateway address.
