Computer Networking
Why does the data communication industry use the layered OSI reference model?1. It divides the network communication process into smaller and simpler components, thus aiding component development, design, and troubleshooting.2. It enables equipment from different vendors to use the same electronic components, thus saving research and development funds.3. It supports the evolution of multiple competing standards and thus provides business opportunities for equipment manufacturers.4. It encourages industry standardization by defining what functions occur at each layer of the model.

1 only
1 and 4
3 only
2 and 3

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Computer Networking
"BAUD" rate means

The number of bytes transmitted per unit time.
The rate at which the signal changes.
None of these
The number of bits transmitted per unit time.

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Computer Networking
You type show running-config and get this output:[output cut]Line console 0 Exec-timeout 1 35 Password BIXPASSWD Login[output cut]What do the two numbers following the exec-timeout command mean?

If no commands have been typed in 1 minute and 35 seconds, the console connection will be closed.
If no command has been typed in 35 seconds, the console connection will be closed.
If you're connected to the router by a Telnet connection, input must be detected within 1 minute and 35 seconds or the connection will be closed.
If no router activity has been detected in 1 hour and 35 minutes, the console will be locked out.

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Computer Networking
Contention is

One or more conductors that serve as a common connection for a related group of devices
a continuous frequency capable of being modulated or impressed with a second signal
None of these
the condition when two or more stations attempt to use the same channel at the same time
a collection of interconnected functional units that provides a data communications service among stations attached to the network

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Computer Networking
A WATS arrangement

is less expensive than flat-rate service only when the number of calls is large and the duration of each is short
None of these
is always less expensive than flat-rate service
is less expensive than flat-rate service only when the number of calls is small and the duration of each is long
is never less expensive than flat-rate service

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