Computer Networking
What are reasons for creating OSPF in a hierarchical design?1. To decrease routing overhead2. To speed up convergence3. To confine network instability to single areas of the network4. To make configuring OSPF easier

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

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Computer Networking
You type the following command into the router and receive the following output:Router#show serial 0/0 ^% Invalid input detected at '^' marker.Why was this error message displayed?

You need to be in privileged mode.
You cannot have a space between serial and 0/0.
Part of the command is missing.
The router does not have a serial0/0 interface.

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Computer Networking
Bandlimited signal is

None of these
All of these
a signal all of whose energy is contained within a finite frequency range
transmission of signals without modulation
simultaneous transmission of data to a number of stations

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