Computer Networking
Messages from one computer terminal can be sent to another by using data networks. The message to be sent is converted to an electronic digital signal, transmitted via a cable, telephone or satellite and then converted back again at the receiving end. What is this system of sending messages called?

Global network
Electronic mail
None of these
Electronic newspaper
Paperless office

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Computer Networking
You have your laptop directly connected into a router's Ethernet port. Which of the following are among the requirements for the copy flash tftp command to be successful?1. TFTP server software must be running on the router.2. TFTP server software must be running on your laptop.3. The Ethernet cable connecting the laptop directly into the router's Ethernet port must be a straight-through cable.4. The laptop must be on the same subnet as the router's Ethernet interface.5. The copy flash tftp command must be supplied the IP address of the laptop.

3 and 5 only
1, 3 and 4
5 only
2, 4 and 5

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

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