O que separa o uso de endereços DLC vs MAC?
Eles são a mesma coisa, quando usados no contexto de redes Ethernet.
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DLC é uma abreviação de D ata L tinta C no controle.
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MAC é uma abreviação de M edia Um cesso C ontrol.
Nas redes padrão IEEE 802 - que incluem Ethernet - o endereço DLC é geralmente chamado de endereço MAC.
Every network interface card (NIC) has a DLC address or DLC identifier (DLCI) that uniquely identifies the node on the network.
Some network protocols, such as Ethernet and Token-Ring use the DLC addresses exclusively.
Other protocols, such as TCP/IP, use a logical address at the Network Layer to identify nodes. Ultimately, however, all network addresses must be translated to DLC addresses.
In TCP/IP networks, this translation is performed with the Address Resolution Protocol (ARP).
For networks that conform to the IEEE 802 standards (e.g., Ethernet), the DLC address is usually called the Media Access Control (MAC) address.
Fonte DLC