A network engineer obtains a multicast data frame whose destination MAC address is 01-00-5e-00-01-01. Given this, which of the following cannot be the destination IPv4 address of this frame?
Multicast MAC addresses follow the format 01-00-5E-XX-XX-XX, derived from the IPv4 multicast address (224.0.0.0 – 239.255.255.255).
The lower 23 bits of the IPv4 multicast address are mapped to the MAC address, causing ambiguity because different IPv4 multicast addresses can share the same MAC address.
The IPv4 multicast range (224.0.0.0 – 239.255.255.255) is divided as follows:✅ 224.0.0.0 – 224.0.0.255: Local Network Control Block (e.g., 224.0.0.1)✅ 224.0.1.0 – 238.255.255.255: Global and Reserved Multicast (e.g., 224.0.1.1, 225.0.1.1)❌ 239.0.0.0 – 239.255.255.255: Private Multicast (Not mapped to 01-00-5E)
The MAC 01-00-5e-00-01-01 corresponds to an IPv4 multicast address in the range 224.0.0.0 – 238.255.255.255, but not to 239.128.1.1, because addresses in the 239.x.x.x range are private multicast addresses.
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