Answer the following problems.
problem 1) Why CSMA | CD fails in wireless network?
problem 2) Describe network and switching subsystems.
problem 3) Why is routing in multihop ad-hoc network is complicated?
problem 4) Describe the architecture of WAP with diagram.
problem 5) List the entities of mobile IP and describe data transfer from a mobile node to a fixed node. Why and where encapsulation is needed?