1. DIALOGUE CONTROL
   1. DEF
      1. control how communication will proceed
   2. Type
      1. Simplex
         1. ONE SIDE talk
         2. ignore the other side
         3. features
            1. cheap
            2. no contention
            3. broad area coverage
      2. Half-duplex
         1. each side talk while knowing other is listening
         2. wait for their turn
         3. features
            1. one channel, both transmission/reception
            2. Bi-derectional communication
      3. Full-duplex
         1. both connections work simultaneously
2. SESSSION ADMINISTRATION
   1. Connection establishment
   2. Data transfer
   3. Connection release
3. PROTOCOL
   1. RTCP
      1. Real-Time Control Protocol
   2. SSH
      1. Secure Shell
   3. SDP
      1. Socket Direct Protocol