#Convert mac address to bits mac#
We have talked about mac addresses used in multicast world and the 32 same ip addresses that is used with the same mac addresses. Format of MAC Address MAC Address is a 12-digit hexadecimal number (6-Byte binary number), which is mostly represented by Colon-Hexadecimal notation. In this lesson, we have learned an important lesson of multicast technology. For another Multicast MAC, there are another 32 ip addresses certainly.
#Convert mac address to bits windows#
If you ping it from a Windows PC, you can use 'arp -a' from the command line to see the mapping. If you ping it from a router, enter the 'show arp' command to see what it's MAC is.
Many network interfaces, however, support. Hi, The only way to find that out is to inspect the ARP tables after generating some traffic (e.g. Each address can be stored in hardware, such as the card's read-only memory, or by a firmware mechanism. Int is too small of a data type for that (MAC is a hexadecimal number representing something in the size of 248, int tops out around 231). This is tru for all these 32 ip addresses. 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. MAC addresses CAN't be converted to integer (Int). These Multicast IP Addresses that can be used with this created MAC Address are given below:įor example like 224.255.0.1 multicast ip address, 230.127.0.1, 232.255.0.1, 238.255.0.1 ip addresses will also use the same MAC that we have produced. Here, with the 5th, 6th, 7th, 8th and 9th bits, 32 different Multicast IP Addresses can be written. So, 2^5, you can create 32 different IP address with this changable area.įor our example, the Multicast IP addresses that share the same Multicast MAC Address are showed below. And the remainning 5 bits in the middle can be any value. The last 23 bits are used for Multicast MAC Address. It is 25 bits.Ĥ) Lastly, we will combine the fixed 25 bits with the last 23 bits of the multicast ip to create our Multicat MAC Address :Ġ0000001:00000000:01011110:0 1111111.00000000.00000001 = 01:00:5e:7F:00:01įor Multicast IP Address, the first 4 bits are fixed, these first four bits are 1110. Figure 2 shows these patterns for selected 8-bit values.3) We will take the fixed part of the Multicast MACs like below and we will write it in binary format. With practice, it is possible to recognize the binary bit patterns that match the decimal and hexadecimal values. If such conversions are required, it is usually easier to convert the decimal or hexadecimal value to binary, and then to convert the binary value to either decimal or hexadecimal as appropriate. Number conversions between decimal and hexadecimal values are straightforward, but quickly dividing or multiplying by 16 is not always convenient. Hexadecimal is used to represent Ethernet MAC addresses and IP Version 6 addresses. Therefore, the examples above would be shown as 0x0A and 0x73 respectively.
However, because subscript text is not recognized in command line or programming environments, the technical representation of hexadecimal is preceded with "0x" (zero X). Less commonly, it may be followed by an H, for example 73H. Hexadecimal is usually represented in text by the value preceded by 0x (for example 0x73) or a subscript 16.
Note: It is important to distinguish hexadecimal values from decimal values regarding the characters 0 to 9, as shown in Figure 1.
For example, the binary value 0000 1010 is shown in hexadecimal as 0A. Leading zeroes are always displayed to complete the 8-bit representation. Given that 8 bits (a byte) is a common binary grouping, binary 00000000 to 11111111 can be represented in hexadecimal as the range 00 to FF. It is easier for us to express a value as a single hexadecimal digit than as four binary bits. Figure 1 shows the equivalent decimal and hexadecimal values for binary 0000 to 1111. The base sixteen number system uses the numbers 0 to 9 and the letters A to F. Just as decimal is a base ten number system and binary is a base two number system, hexadecimal is a base sixteen system. Hexadecimal provides a convenient way to represent binary values. When used by itself (as a noun) it means the hexadecimal number system. Snarkiness aside, hex to binary is easy, just replace each hex digit with its corresponding 4 digit. Hexadecimal is a word that is used both as a noun and as an adjective. The use of the MAC address is one of the most important aspects of the Ethernet LAN technology.
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