Which Protocol is used to obtain the MAC address from a given IP address?

TCP is less reliable but faster than UDP.

What is the top-most level of the Internet domain name hierarchy called?

Which statements are true regarding UDP?

Which protocol does the ping command use when attempting to test whether a remote host is running?

You have a Class A network address with 60 subnets. You need to add 40 new subnets in the next two years and still allow for the largest possible number of host IDs per subnet. Which subnet mask should you assign?