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Putting more than one Ethernet device on the same port

reduces the load on the switch.

prevents the devices from communicating with one another.

increases the size of the collision domain.

enables the devices to communicate with one another.

Question $4(5$ points$)$

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Frequency division multiplexing is accomplished by

modulating two or more carrier signals transmitted simultaneously on the same medium.

switching rapidly among frequencies, or frequency$-$hopping.

sending two or more digital signals alternately on the same medium.

sending explicit timing information along with the digital signal.