Computer Networking
Which fields are contained within an IEEE Ethernet frame header?1. Source and destination MAC address2. Source and destination network address3. Source and destination MAC address and source and destination network address4. FCS field

2 and 3 only
2 only
1 and 4
3 only

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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?

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

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Computer Networking
The main difference between synchronous and asynchronous transmission is

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

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