Answer:
-Consiste en conectar varias redes de computadoras basadas en diferentes protocolos -Requiere la definición de un protocolo de interconexión común sobre los protocolos locales. -El Protocolo de Internet (IP) desempeña este papel, definiendo direcciones únicas para una red y una máquina host.
Answer: TDMA(Time division multiple access)
Explanation: Time-division multiple access is the method that is used by GSM(Global system for mobile communication) usually for the separation process of the data.It is a way in which a same frequency is shared by different time slots of signal.It has high flexibility and so thus is helpful for the GSM network and provides easy services of division.It divides the data according to the time period slots in a GSM network.