A. Local addressing:
Layer 2 assigns physical addresses (MAC addresses) to network interface cards (NICs) for devices on a local network. These addresses are used for device-to-device communication within the same network segment.
D. Error detecting:
Layer 2 includes error-detection mechanisms to ensure that data transmitted over the physical medium is free from errors or corruption. This error detection (not correction), ensures data integrity.
A. Local addressing: Layer 2 uses Media Access Control (MAC) addresses to uniquely identify devices on the same local network. Assuming this is what they've meant to say by ''local''.
D. Error detecting: Layer 2 detects errors in data transmission that occur at the physical layer. This is done by adding error-checking bits to the data frames
A. Local addressing: Yes, this is a correct function of Layer 2. The Data Link Layer uses local addressing, such as MAC addresses, for communication within the same network.
E. Port addressing: No, this is not a function of Layer 2. Port addressing is associated with Layer 4 (Transport Layer), where ports are used to distinguish between different services on the same device.
So, the correct choices are A and not E.
A. Local addressing
E. Port addressing
Explanation:
Layer 2 of the OSI model is the Data Link Layer, and it is responsible for providing node-to-node communication and addressing within the local network segment.
A. Local addressing
E. Port addressing
Explanation:
A. Local addressing: Layer 2 operates at the data link layer and uses MAC addresses for identifying devices within the same local network segment. It manages local addressing, assigning and recognizing unique MAC addresses for devices on the same network segment.
E. Port addressing: Layer 2 uses port addressing to direct traffic within a network segment to the correct destination. It deals with different ports on the devices to ensure that data is sent to the intended recipient within the local network.
Layer 2 of the OSI model is primarily associated with local addressing (A) and error detecting (D).
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