What can dynamically map the first MAC address of a device to a port upon connection?

What can dynamically map the first MAC address of a device to a port upon connection?

• A. Static MAC Assignment
• B. Dynamic IP Allocation
• C. Persistent MAC Learning
• D. Static ARP Entries

Answer: (C)

The correct choice refers to the mechanism known as persistent MAC learning, which is employed by network switches to record the MAC addresses of devices as they connect to specific ports. When a device first connects to a switch, the switch learns the MAC address of the device and associates it with the port it is connected to. This process happens dynamically, meaning that the switch actively monitors network traffic and updates its MAC address table accordingly. Persistent MAC learning ensures that, once a device’s MAC address is mapped to a port, the switch retains this mapping even after the device disconnects and reconnects later. This minimizes the need for repeated learning processes and enhances network efficiency by reducing the time taken to establish communication for returning devices. In contrast, static MAC assignment involves manually configuring the switch to map specific MAC addresses to certain ports and does not allow for dynamic changes. Dynamic IP allocation pertains to the assignment of IP addresses via protocols like DHCP and is not related to MAC address mapping on switch ports. Static ARP entries are related to IP to MAC address mapping at the network layer and are not applicable for dynamically associating MAC addresses to switch ports.

The correct choice refers to the mechanism known as persistent MAC learning, which is employed by network switches to record the MAC addresses of devices as they connect to specific ports. When a device first connects to a switch, the switch learns the MAC address of the device and associates it with the port it is connected to. This process happens dynamically, meaning that the switch actively monitors network traffic and updates its MAC address table accordingly.

Persistent MAC learning ensures that, once a device’s MAC address is mapped to a port, the switch retains this mapping even after the device disconnects and reconnects later. This minimizes the need for repeated learning processes and enhances network efficiency by reducing the time taken to establish communication for returning devices.

In contrast, static MAC assignment involves manually configuring the switch to map specific MAC addresses to certain ports and does not allow for dynamic changes. Dynamic IP allocation pertains to the assignment of IP addresses via protocols like DHCP and is not related to MAC address mapping on switch ports. Static ARP entries are related to IP to MAC address mapping at the network layer and are not applicable for dynamically associating MAC addresses to switch ports.