The _________ layer is responsible for routing of messages from the sender to the final destination.
a. data communication layer
b. resident layer
c. application layer
d. network layer
e. physical layer
Answer: d
The _________ layer is responsible for routing of messages from the sender to the final destination.
a. data communication layer
b. resident layer
c. application layer
d. network layer
e. physical layer
Answer: d