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No modelo de referência ISO/OSI, quais são as subcamadas da camada de enlace?
Real Exam
Community
DDanyel
A
Controle de fluxo e controle de congestionamento.
B
Controle de enlace lógico e controle de acesso ao meio.
C
Multiplexação e enlace.
D
Física e Rede.
E
Transporte e apresentação.
Explanation:
Explanation
In the ISO/OSI reference model, the Data Link Layer (Layer 2) is divided into two sublayers:
- Logical Link Control (LLC) Sublayer - Responsible for flow control, error control, and framing
- Media Access Control (MAC) Sublayer - Responsible for controlling access to the physical medium
Why other options are incorrect:
- A: Flow control and congestion control are functions of the Data Link Layer, but they are not the sublayers themselves
- C: Multiplexing is a function of various layers, but not a sublayer of Data Link Layer
- D: Physical and Network are separate layers (Layer 1 and Layer 3), not sublayers of Data Link Layer
- E: Transport and Presentation are separate layers (Layer 4 and Layer 6), not related to Data Link Layer sublayers
The correct answer is B because it accurately identifies the two standard sublayers of the Data Link Layer in the OSI model: Logical Link Control (LLC) and Media Access Control (MAC).
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