This means that a service is being denied to a computer, network, or network server. These can be on individual machines, on the network that connects the machines, or on all machines simultaneously.

When used with ofstream objects, operator! is not:

a. Overloaded. b. Used to determine if the open operation succeeded. c. Used to close a file explicitly. d. Used to return a nonzero value if an error occurs.

Define discrete multitone.

What will be an ideal response?