Hello everyone, I am Time Customer Service Time Jun, I will answer the above questions for you.
The mac address is usually found in the computer's network card ROM, which solidifies the physical address in the serial EEPROM on the network card, usually with a length of 48 bits. Identifiers used to represent every site on the Internet are represented by hexadecimal numbers.
Addresses are numbered starting from 0, and 1 is added sequentially each time, so the physical address space of the memory is growing linearly. It is represented by binary numbers, is an unsigned integer, and is written in a hexadecimal number. It is the address signal of addressing physical memory that appears on the external address bus of the CPU and is the final result of address transformation. For memory chip level unit addressing, corresponding to the address bus connected to the processor and CPU.
In computer science, a physical address, also called a real address or a binary address, exists in electronic form on the address bus, so that the data bus can access the memory address of a specific memory unit in the main memory. In computers with virtual memory, the term physical address is mostly used to distinguish virtual addresses. Especially in computers that use memory management units (MMUs) to convert memory addresses, virtual and physical addresses refer to addresses before and after conversion by MMU, respectively. In computer networks, physical addresses are sometimes synonymous with MAC addresses. This address is actually used for the data link layer, not on the physical layer as its name refers to.