In a TCP/IP network, for nodes to communicate between each other, which of the following is required? Choose all that apply.

A.
IP address.

B.
Subnet mask.

C.
Default gateway address.

D.
All of the above.

Explanation:
In a TCP/IP network, a node needs a valid IP address and subnet mask, and default gateway address so that it can communicate with other nodes in the network.
References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 508-513.