What is the significance of the multicast address range 224.0.0.1 through 224.0.0.254?
A.
They have link-local scope.
B.
They have administrative region scope.
C.
They are reserved for future use.
D.
They have a scope of two or more hops from a router.
The range of addresses between 224.0.0.0 and 224.0.0.255, inclusive,
is reserved for the use of routing protocols and other low-level
topology discovery or maintenance protocols, such as gateway discovery
and group membership reporting. Multicast routers should not forward
any multicast datagram with destination addresses in this range,
regardless of its TTL.
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http://www.iana.org/assignments/multicast-addresses/multicast-addresses.xhtml#multicast-addresses-1
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