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Computer Networking

Computer Networking
Which WLAN IEEE specification allows up to 54Mbps at 2.4GHz?

G
N
A
B

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Computer Networking
You are working with a network that is 172.16.0.0 and would like to have the maximum number of hosts per subnet. This assumes support for eight subnets. What subnet mask should you use?

255.255.192.0
255.255.255.0
255.255.240.0
255.255.224.0
255.255.248.0

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Computer Networking
What layer of the OSI model would you assume the problem is in if you type show interface serial 1 and receive the following message? "Serial1 is down, line protocol is down."

None. It is a router problem.
Network layer
Physical layer
Data Link layer

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Computer Networking
You have a network with a subnet of 172.16.17.0/22. Which is the valid host address?

172.16.18.255 255.255.252.0
172.16.0.1 255.255.240.0
172.16.20.1 255.255.254.0
172.16.17.1 255.255.255.252

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Computer Networking
What is the port number for NNTP?

80
70
119
None of these
79

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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?

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

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