Computer Networking
The main difference between synchronous and asynchronous transmission is

the bandwidth required is different
None of these
the clocking is derived from the data in synchronous transmission
the pulse height is different.
the clocking is mixed with the data in asynchronous transmission

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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?

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

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Computer Networking
ICMP (Internet Control Message Protocol) is

a TCP/IP protocol used to dynamically bind a high level IP Address to a low-level physical hardware address
a protocol used to monitor computers
None of these
a protocol that handles error and control messages
a TCP/IP high level protocol for transferring files from one machine to another

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