Computer Networking
In OSI model, which of the following layer transforms information from machine format into that understandable by user

None of these
physical
session
presentation
application

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Computer Networking
Baseband is

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

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Computer Networking
If a switch receives a frame and the source MAC address is not in the MAC address table but the destination address is, what will the switch do with the frame?

Discard it and send an error message back to the originating host
Add the destination to the MAC address table and then forward the frame
Flood the network with the frame
Add the source address and port to the MAC address table and forward the frame out the destination port

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