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Computer Networking

Computer Networking
Which of the following network access standard is used for connecting stations to a circuit-switched network?

X.21
None of these
X.3
X.75
X.25

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Computer Networking
You have a class A network address 10.0.0.0 with 40 subnets, but are required to add 60 new subnets very soon. You would like to still allow for the largest possible number of host IDs per subnet. Which subnet mask should you assign?

255.255.255.255
255.248.0.0
255.252.0.0
255.254.0.0
255.240.0.0

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Computer Networking
Which of the following might be used by a company to satisfy its growing communications needs?

concentrator
controller
multiplexer
front-end processor
All of these

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Computer Networking
Error detection at the data link level is achieved by

Bit Stuffing
Cyclic Redundancy Code
Hamming Code
Equalization

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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 Server
Network operating system
Virtual Private Network
OSI

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Computer Networking
What command is used to create a backup configuration?

copy running-config startup-config
wr mem
copy running backup
config mem

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