Question

What are two services performed by the data link layer of the OSI model?

1. It monitors the Layer 2 communication by building a MAC address table.
2. It provides media access control and performs error detection.

Answer 1

The data link layer of the OSI model performs media access control and error detection.

Step-by-step explanation:

The data link layer of the OSI model performs two main services:

1. Media access control: The data link layer is responsible for controlling how devices access the physical media, such as Ethernet cables. It determines when a device can transmit data and avoids collisions with other devices.
2. Error detection: The data link layer checks for errors that may occur during transmission, using mechanisms like checksums. It ensures that the data received is free of errors and can be delivered to the network layer for further processing.