Flat
A Mac address is a 48bit addressing scheme (usually represented in HEX). There are 8 bits in a bytes therefore it is 6 bytes long.
MAC addressing. IP addressing. port addressing. specific address.
The original IEEE 802 MAC address comes from the original Xerox Ethernet addressing scheme. This 48-bit address space contains potentially 248 or 281,474,976,710,656 possible MAC addresses.
the source Layer 2 address of incoming frames
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A MAC address is used as a unique identifier that is assigned to network interfaces. Two networking devices that transmit packets based on MAC addresses are switches and bridges.
Physical and MAC addressing are found in the OSI layer 2?
MAC provides physical addressing. The BIA (Burn In Address) which is stored in RAM when the computer boots up is added to each frame that is created as the source mac address. But to answer your question, the MAC layer does the following: Data Encapsulation and Media Access Control.
See the OSI layer. The MAC address is the base addressing. IP addresses ride on top of the MAC Addresses.
Hierarchical addressing organizes addresses in a tree-like structure with levels or layers, like in IP addresses. Flat addressing treats all addresses as equal without any structure or hierarchy, like in MAC addresses.
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MAC is a layer 2 addressing scheme. Layer 2 schemes will not propagate beyond a router. So in general, from a network perspective, you will not see someones mac address past a router. If you are on the same subnet, you may be able to get this via an ARP request. If one was able to gain some sort of remote access to your computer, they could issue a command to query the interface information (ipconfig / ifconfig) to get this info. It is also feasible to have some sort of malware that could get this same info and send it on. Not sure why one would care.