Computer Networking
Modulation is the process of

converting digital signals to analog signals
converting analog signals to digital signals
performing data encryption.
Multiplexing various signals into high speed line signals

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Computer Networking
ICMP (Internet Control Message Protocol) is

a TCP/IP high level protocol for transferring files from one machine to another
a protocol that handles error and control messages
a protocol used to monitor computers
a TCP/IP protocol used to dynamically bind a high level IP Address to a low-level physical hardware address
None of these

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Computer Networking
The MAC (Media Access Control) address of the network card is used in both Ethernet and Token-Ring networks and is essential for communication. What does MAC provide?

A physical address that is assigned by the manufacturer
The logical domain address for the workstation
A logical address that identifies the workstation
A physical address that is randomly assigned each time the computer is started
An alias for the computer name

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