Computer Networking
Which configuration command must be in effect to allow the use of 8 subnets if the Class C subnet mask is 255.255.255.224?

Router (config) #ip unnumbered
Router (config) #no ip classful
Router (config) #ip subnet-zero
Router (config) #ip classless

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Computer Networking
What is the problem with an interface if you type show interface serial 0 and receive the following message? "Serial0 is administratively down, line protocol is down."

The administrator is pinging from the interface.
No cable is attached.
The keepalives are different times.
The administrator has the interface shut down.

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Computer Networking
Which of the following refers to the terms "residual error rate"?

the number of bit errors per twenty four hours of continuous operation on an asynchronous line
the probability that one or more errors will be detected when an error detection mechanism is used
signal to noise ratio divided by the ratio of energy per bit to noise per hertz
None of these
The probability that one or more errors will be undetected when an error detection scheme is used

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Computer Networking
Which of the following is true when describing a unique local address?

These are your typical publicly routable addresses, just like a regular publicly routable address in IPv4.
These addresses are meant for nonrouting purposes, but they are almost globally unique so it is unlikely they will have an address overlap.
Packets addressed to a unicast address are delivered to a single interface.
These are like private addresses in IPv4 in that they are not meant to be routed.

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