Under which layer of the OSI model do ATM cells operate?
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Question
Under which of the following layers of the OSI model do ATM cells operate?
A.
Data link B.
Network C.
Session D.
Transport E.
Presentation.
A.
Explanations
Under which of the following layers of the OSI model do ATM cells operate?
A.
Data link
B.
Network
C.
Session
D.
Transport
E.
Presentation.
A.
ATM (Asynchronous Transfer Mode) is a technology that operates at the Data Link layer (Layer 2) and the Network layer (Layer 3) of the OSI (Open Systems Interconnection) model.
At the Data Link layer, ATM uses a virtual circuit to provide a connection-oriented service for data transmission. The virtual circuit is established between two endpoints, and all cells that are transmitted over the circuit follow the same route. This helps to ensure that cells are transmitted in the correct order and with minimal delay.
At the Network layer, ATM uses a connectionless service to transport cells between endpoints. This means that each cell is transmitted independently and may follow a different path to reach its destination. The Network layer also provides functionality for addressing, routing, and congestion control.
Therefore, the correct answer to the question is A. Data Link.
