What is a locally administered MAC address?
A MAC address is called a universally administered address (UAA) when it’s set by the manufacturer or a locally administered addresses (LAA) when it’s assigned by the system administrator. A locally administered address is assigned to a device by a network administrator, overriding the burned-in address.
Which layer assigns MAC addresses on devices in a local network?
data link layer
MAC addresses function at the data link layer (layer 2 in the OSI model). They allow computers to uniquely identify themselves on a network at this relatively low level.
What protocols use MAC addresses?
Since ethernet uses MAC addresses, the sender needs to get the MAC address of the next hop. There is a special protocol ARP (address resolution protocol) that is used for that.
Where do Mac locally administered address resolved names come from?
These resolutions come from the well-known-addresses file, called ‘wka’. And if it was 02:0F:B5:xx:yy:zz it must have said ‘MS-NLB-VirtServer’. As for the use of the MAC addresses in ARP messages you would have to specify where in the ARP message the occurred.
How is the MAC address of a DECnet network determined?
The MAC address of the Ethernet interface is changed by the DECnet software to be AA-00-04-00-XX-YY where XX-YY reflects the DECnet network address xx.yy of the host. This eliminates the need for an address resolution protocol since the MAC address for any DECnet host can be simply determined.
Is the MAC address the same as the physical address?
A MAC address may be referred to as the burned-in address, and is also known as an Ethernet hardware address, hardware address, and physical address (not to be confused with a memory physical address ). A network node with multiple NICs must have a unique MAC address for each.
How many MAC addresses are in a 48 bit address space?
This 48-bit address space contains potentially 2 48 or 281,474,976,710,656 possible MAC addresses. The IEEE manages allocation of MAC addresses, originally known as MAC-48 and which it now refers to as EUI-48 identifiers.