What is the Layer 2 multicast MAC address that corresponds to the Layer 3 IPv4 multicast address 224.139.34.56?
The Layer 2 multicast MAC address that corresponds to the Layer 3 IPv4 multicast address 224.139.34.56 can be determined using a specific mapping algorithm. In IPv4, multicast addresses fall within the range of 224.0.0.0 to 239.255.255.255.
These addresses are assigned to multicast groups and are used for one-to-many communication.
To obtain the corresponding Layer 2 multicast MAC address for a given Layer 3 IPv4 multicast address, we use the mapping algorithm defined by the Internet Assigned Numbers Authority (IANA). The algorithm takes the IPv4 multicast address and replaces the last 23 bits with a multicast MAC address format.
For the given IPv4 multicast address 224.139.34.56, we can determine the Layer 2 multicast MAC address by following the algorithm:
1. Convert the decimal IPv4 address to binary: 11100000.10001011.00100010.00111000
2. Extract the last 23 bits: 10001011.00100010.00111000
3. Prepend the Organizationally Unique Identifier (OUI): 0100.5E
4. Combine the OUI and the last 23 bits: 0100.5E10.221C
Therefore, the Layer 2 multicast MAC address corresponding to the Layer 3 IPv4 multicast address 224.139.34.56 is 01:00:5E:10:22:1C.
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