Amethod to move data through a network of links and switches which reserves communication sessions between end systems is called:
circuit switching and packet switching
access networks
packet switching
throughput
none of the above

Circuit switching and packet switching

Explanation: Circuit switching is the switching technique through the connection from the source port to the destination port.Packet switching is also a switching techniques in connectionless form for the data packets. Both these switching techniques helps in communication between end and start ports.

Other option are incorrect as the access networks provide the access to the network and throughput is the input passing in the network.Thus, the correct option is circuit switching and packet switching .

they really not common the os x is just a better version of the os like in iphone theirs xr and their xs

the answer is d underlined.