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Computer Networking

Computer Networking
An example of a medium-speed, switched communications service is

None of these
All of these
Dataphone 50
Series 1000
DDD

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Computer Networking
If odd parity is used for ASCII error detection, the number of 0s per eight-bit symbol is _____.

indeterminate
42
even
odd

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Computer Networking
The dialogue techniques for terminal use do not include

form fillings
menu display
None of these
questions and answers
open-ended questions

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Computer Networking
If you use either Telnet or FTP, which is the highest layer you are using to transmit data?

Transport
Presentation
Session
Application

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Computer Networking
Data link layer retransmits the damaged frames in most networks. If the probability of a frame's being damaged is p, what is the mean number of transmissions required to send a frame if acknowledgements are never lost.

KIK (1 + F)
1/ (1 - F)
K I (K - P)
P I (K + 1)
None of these

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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?

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

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