At which Data Link sublayer does the physical address reside?1 pointMedia Access Control - MACLogical Link Control - LLCData Access Control - DACNetwork Access Control - NAC

Sure, let's break down the question step by step:

1. Understanding the Data Link Layer: The Data Link Layer (Layer 2) in the OSI model is responsible for node-to-node data transfer and error detection and correction. It is divided into two sublayers:

   • Media Access Control (MAC)
   • Logical Link Control (LLC)

2. Media Access Control (MAC) Sublayer: This sublayer is responsible for controlling how devices on a network gain access to the medium and permission to transmit data. It also handles the physical addressing.

3. Logical Link Control (LLC) Sublayer: This sublayer is responsible for identifying and encapsulating network layer protocols, and controlling error checking and frame synchronization.

4. Physical Address: The physical address, also known as the MAC address, is a unique identifier assigned to network interfaces for communications on the physical network segment.

Given this information, the physical address (MAC address) resides at the Media Access Control (MAC) sublayer.

So, the correct answer is: Media Access Control - MAC