The Magnetic attraction will decrease
You may be talking about calling via WiFi, that is where you use WiFi to call people. That is normally used in tablets where you can't have a phone provider, so you just use WiFi to call and that saves a lot of money.
Answer:
(B) SAN
Explanation:
If you are looking to implement a high-speed network with the sole purpose of providing storage to other attached servers, you need to implement a SAN (Storage Area Network). SAN organizes storage by block and makes the storage blocks available to accessing server nodes over the network. The interconnecting network used within a SAN needs to be very high speed to reduce delays, so technologies such as Infiniband are used.