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Ethernet

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Addresses

An address is unicast if the least significant bit of the first byte is 0. Otherwise, it is either broadcast:

FF:FF:FF:FF:FF:FF: segment broadcast

or multicast:

Local Network Control Block (224.0.0/24)

01:00:5e:00:00:01 (224.0.0.1): All-Hosts
01:00:5e:00:00:02 (224.0.0.2): All-Routers
(224.0.0.22): IGMP
(224.0.0.251, ff02::fb): mDNS
33:33:00:01:00:02 (ff02::1:2): DHCPv6 server/relay

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Networking