The recommended secure protocol for voice and video applications is the Secure<span> Real-time Transport </span>Protocol<span> (SRTP) protocol. SRTP is a Real-time Transport </span>Protocol (RTP) profile used to to provide encryption, message authentication and integrity.
The default cipher of SRTP is the Advanced Encryption Standard<span> (AES) .</span>
It sounds like you are looking for a network. If a node can not find a network to connect to, then it cannot connect.
Probably c or a with the question your asking
Answer:
A typical digital computer system has four basic functional elements: (1) input-output equipment, (2) main memory, (3) control unit, and (4) arithmetic-logic unit. Any of a number of devices is used to enter data and program instructions into a computer and to gain access to the results of the processing operation.
Explanation: