A MAC address uses which of the following formats?

As the network engineer, you are shown the following IP address and subnet mask: 10.100.48.27/19. What is the valid host range for this IP address?

A) 10.100.0.1 through 10.100.31.255 B) 10.100.32.1 through 10.100.63.254 C) 10.100.32.0 through 10.100.63.255 D) 10.100.32.1 through 10.100.95.255

The ________ accepts the message submitted by a message user agent and enforces the policies of the hosting domain and the requirements of Internet standards.

A. mail submission agent B. message user agent C. mail delivery agent D. message transfer agent