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Computer Networking

Computer Networking
The EIA-232 interface has _____ pins.

30
25
24
None of these
20

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Computer Networking
Which statement is true regarding classless routing protocols?1. The use of discontiguous networks is not allowed.2. The use of variable length subnet masks is permitted.3. RIPv1 is a classless routing protocol.4. IGRP supports classless routing within the same autonomous system.5. RIPv2 supports classless routing.

2 and 5
1, 3 and 5
3 and 4
None of these

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Computer Networking
Intranets and extranets can use their network fire walls and other security features to establish secure Internet links within an enterprise or with its trading partners. Select the best fit for answer:

Network operating system
OSI
Virtual Private Network
Network Server

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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.

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

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Computer Networking
What is the name of the software package that allows people to send electronic mail along a network of computers and workstations?

Electronic mail package
Memory resident package
None of these
Data communication package
Project management package

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

None of these
Aloha
broadcast
Analog transmission
Band width

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