Computer Networking
You save the configuration on a router with the copy running-config startup-config command and reboot the router. The router, however, comes up with a blank configuration. What can the problem be?

You didn
The newly upgraded IOS is not compatible with the hardware of the router.
NVRAM is corrupted.
The configuration register setting is incorrect.

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Computer Networking
You are connecting your access point and it is set to root. What does Extended Service Set ID mean?

That you have multiple access points, but one is a repeater access point.
That you have multiple access points, but they are placed physically in different buildings.
That you have more than one access point and they are in separate SSIDs connected by a distribution system.
That you have more than one access point and they are in the same SSID connected by a distribution system.

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Computer Networking
A front-end processor is

a processor in a large-scale computer that executes operating system instructions
a user computer system
None of these
preliminary processor of batch jobs.
a minicomputer that relieves main-frame computers at a computer centre of communications control functions

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