Q1: A protocol used to retrieve e-mail from a remote mail server.
Q2: A service that resides on computers that are connected to the Internet and allows end users to access data that is stored on the computers using standard interface software (browsers).
Q3: The process of guaranteeing data has not been modified or destroyed during transit through the network.
Q4: The network model where there is at least one server.
Q5: A port to connect external device.
