TRANSPORT LAYER
TRANSMISSION CONTROL PROTOCOL TCP
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It is hardwired by the manufacturer
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It is assigned by an Internet service provider
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It is generated by the customer
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None of the above
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Detailed explanation-1: -Manufacturers assign a MAC address to a network adapter when it is produced. It is hardwired or hard-coded onto your computer’s NIC and is unique to it. Something called the Address Resolution Protocol (ARP) translates an IP address into a MAC address.
Detailed explanation-2: -MAC addresses are primarily assigned by device manufacturers, and are therefore often referred to as the burned-in address, or as an Ethernet hardware address, hardware address, or physical address.
Detailed explanation-3: -Therefore, an Ethernet MAC address consists of a 6-digit hexadecimal vendor OUI code followed by a 6-digit hexadecimal vendor-assigned value, as shown in Figure 7-8. For example, say that Cisco needs to assign a unique MAC address to a new device, and the IEEE has assigned Cisco the OUI 00-60-2F.
Detailed explanation-4: -Remember, we can’t alter the MAC address; it’s hardcoded into the NIC when it’s manufactured. The MAC is globally unique, so two devices can’t have the same MAC address.