Q
_________ is an Upper Layer Protocol that provides Flow Control.
AA. SMTP (simple mail transfer protocol)
BB. Frame relay protocol
CC. Tcp (transmission control protocol)
DD. Icmp (internet control message protocol)
Correct Answer:
A. A. SMTP (simple mail transfer protocol)
Explanation:
SMTP is an upper level protocol and it provides flow control. Whereas Frame relay Protocol operates in the layer such as Data Link Layer that is at lower levels of OSI model. Thus it doesn’t provide flow control or error control. Similarly other protocols such as TCP and ICMP operate in the lower levels of the OSI model.
