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Computer Networking

Computer Networking
What is the subnetwork number of a host with an IP address of 172.16.66.0/21?

172.16.0.0
172.16.48.0
172.16.64.0
172.16.36.0

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Computer Networking
Which of the following are unique characteristics of half-duplex Ethernet when compared to full-duplex Ethernet?1. Half-duplex Ethernet operates in a shared collision domain.2. Half-duplex Ethernet operates in a private collision domain.3. Half-duplex Ethernet has higher effective throughput.4. Half-duplex Ethernet has lower effective throughput.

1,2 and 3
4 only
2 only
1 and 4

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

255.0.0.0
255.255.0.0
None of these
127.0.01
255.255.255.0

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Computer Networking
Which type of OSPF network will elect a backup designated router?1. Broadcast multi-access2. Non-broadcast multi-access3. Point-to-point4. Broadcast multipoint

None of these
1 and 2
3 only
3 and 4

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Computer Networking
The communication mode that supports data in both directions at the same time is

full-duplex
multiplex
None of these
simplex
half-duplex

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Computer Networking
A 4 KHz noise less channel with one sample ever 125 per sec is used to transmit digital signals. If Delta modulation is selected, then how many bits per second are actually sent?

None of these
32 kbps
8 kbps
128 kbps
64 kbps.

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