Network Fundamentals Interview Questions

Which of the following fields in an IP header does a router look into for forwarding the packet?

a. Source IP address.
b. Destination IP address.
c. Subnet Mask.
d. TTL value.

What happens when a router receives an ethernet frame?

a. It looks into the destination mac-address field.
b. Routers do not have the capacity to process ethernet frame.
c. It discards the frame.
d. None of the above.

Which of the following frames would be flooded on a switch port.?

a. Frame with source address as FF-FF-FF-FF-FF-FF
b. Frame with destination mac-address as FF-FF-FF-FF-FF-FF.
c. Frames which do not have the destination mac-address known in the mac-address table of the switch.
d. None of the above.

What does the switch do when the source and destination mac-address in the frame is the same?

a. The source mac-address is added in the mac-address table.
b. The destination mac-address is added in the mac-address table.
c. The frame is filtered and discarded.
d. The frame is flooded to all ports on the switch.

Which type of frames can be interpreted by a hub?

a. Unicast frame.
b. Broadcast frame.
c. Multicast frame.
d. Hubs do not understand frames.

How many switches are required to create 3 vlans?

a. 1
b. 3
c. None of the above.
d. 2 switch and 1 router.

What type of routing entry is looked into by a router to make a forwarding decision to unknown networks?

a. Default gateway.
b. Default route.
c. Static route.
d. Unknown route.

PC1 and PC2 are connected to a switch. PC2 is shutdown. PC1 pings PC2. Which of the following is true?

a. The ARP request from PC1 would not be sent.
b. The ARP reply from PC2 would not be sent.
c. Ping would inform that PC2 is shutdown.
d. None of the above.