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Computer Networking

Computer Networking
Which layer of OSI determines the interface of the system with the user?

Application
Session
Network
None of these
Data-link

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Computer Networking
Which multiplexing technique shifts each signal to a different carrier frequency?

FDM
synchronous TDM
All of these
asynchronous TDM

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Computer Networking
The frequency range : 300 kHz to 3 MHz is used for

FM radio transmission
None of these
TV transmission
microwave communications, satellite and radar
AM radio transmission

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Computer Networking
With an IP address set starting with 150, you currently have six offices that you are treating as subnets. Plans are in place to open 10 more offices before the end of the year. What subnet mask should you use to satisfy the needed number of subnets and maximize the number of hosts available at each site?

240
192
252
224
248

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Computer Networking
How many collision domains are created when you segment a network with a 12-port switch?

2
5
12
1

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Computer Networking
A 8-Mbps token ring has a token holding timer value of 10 msec. What is the longest frame (assume header bits are negligible) that can be sent on this ring?

80,000 B frame
8000 B frame
8 x 105 bit frame
10,000 B frame

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