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多項(xiàng)選擇題

Which two are characteristics of an IPv6 multicast address?()

A.First (most significant ) octet is FF in hex
B.Starts with a prefix of FE80 to FEBF in hex
C.Starts with a prefix of FECO to FEFF in hex
D.Second octet contains a 4-bit multicast scope field
E.Last 64 bit contains the modified MAC address of the Ethernet interface
F.Is allocated from the unicast address space

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