Completion: Complete each statement

10-In mobile environment, authentication protocols require the ..................................... to be contacted during or before the execution of the protocol.

11- The use of digital technique in the second generation of cellular networks enables many features that were not available in the first generation of cellular networks, including ...................................................................................................................., ...................................................................................................................., and .....................................................................................................................

12- Each of the new generation of cellular networks involve stronger ......................................... and more .........................................

13- In the first generation of cellular networks, there was no ................................ of the communication data (voice).

14- In a digital wireless communication system, the transceivers are also called user equipments (UEs), which are typically identified by ............................................., in combination with ...............................

15- In the second generation of cellular communication networks, the service providers can be identified by two components: ........................., and .......................

16- The Home Location Register is responsible for issuing each mobile user a .......................................................... and a ........................................................

17- The .........................and the .......................... are used for the subscriber to authenticate itself to the network