Which communication channel(s) is/are suitable in each of the following situations:
(i) Setting up a LAN.
(ii) Transfer of data from a laptop to a mobile phone.
(iii) Transfer of data from one mobile phone to another.
(iv) Creating a remote control that can control multiple devices in a home.
(v) Very fast communication between two offices in two different countries.
(vi) Communication in a hilly area.
(vii) Communication within a city and its vicinity where cost of cabling is too high.
