The phy layer and mac layer are the only interchangeable communication modules.
true
false

True

Explanation:

Yes, the given statement is true that the physical (PHY) and the MAC ( Media access control) layer are the only interchangeable modules in the communication.  

The physical and MAC layer are the standard wireless personal area network that basically provide the high data rate. PHY is the short type of Physical Layer or medium. It is the layer-1 in OSI stack. It interfaces physical medium with MAC and upper layers. Physical medium can be copper wire, fiber optic link and twisted pair cable.

The main function of the MAC layer is that MAC header toward the beginning of upper layer of the IP packet and CRC toward the finish of IP network packet . The MAC layer header incorporates packet length which will enable receiver about the total length of the given packet.

which of the following is not an effect of technology on farming?

the correct answer is: it makes farmers perform more tasks by hand for apex.