The document discusses the application layer of the TCP/IP model where EMAA programs are primarily used. It also poses a question regarding the channel capacity of a communication channel with a given bandwidth and signal-to-noise ratio, offering multiple-choice answers.

1. In which layer of the TCPnP layers are emaA programs mainly used? Application layer Host-to-
host, or transport layer intemet layer Network access layer Physical layer QUESTION 17 A
communication channel has a bandwidth of 1 MHz , and a signal-to-noise ratio of 255 . What is
its channel capacity? A. 8Mbps B. 4 Mbps C.2Mbps D. 6Mbps E. None F. 10Mbps