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Computer Networking

Computer Networking
What is the default subnet mask for a class A network?

255.255.255.0.0
None of these
127.0.0.1
255.0.0.0
255.255.255.0

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Computer Networking
In which circumstance are multiple copies of the same unicast frame likely to be transmitted in a switched LAN?

During high-traffic periods
In an improperly implemented redundant topology
When upper-layer protocols require high reliability
After broken links are reestablished

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Computer Networking
Error control is needed at the transport layer because of potential errors occurring _____.

from transmission line noise
from packet losses.
from out-of-sequence delivery
in routers

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Computer Networking
The simultaneous transmission of data to a number of stations is known as

None of these
Band width
Analog transmission
broadcast
Aloha

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Computer Networking
The slowest transmission speeds are those of

coaxial cable
microwaves
twisted-pair wire
fiber-optic cable

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Computer Networking
An error detecting code is which code is the remainder resulting from dividing the bits to be checked by a predetermined binary number, is known as

Cyclic redundancy check
Error rate
None of these
Checksum
Error detecting code

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