Computer Networking
Which of the following is an advantage to using fiber optics data transmission?

resistance to data theft
fast data transmission rate
few transmission errors
All of these
low noise level

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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?

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

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