Which of the following are two common switching technologies?
A) sensory and detector
B) circuit and packet
C) carrier and collision
D) access and commuter
Question 2
Three key services provided at the application layer of the OSI model include: 1. synchronizing the services between a user application and the protocol(s) it may use,
2. ensuring that necessary resources required by an application service are available, and 3 . making sure that the correct communication protocol or service is available to the application.