A.Allows incoming TCP connections destined to port 179
B.Allows incoming TCP connections sourced from port 179
C.Allows incoming TCP connections from 1.1.1.1 and destined to，or sourced from port 179
D.Allows incoming TCP connections from 1.1.1.1 that are destined to port 179
E.Allows incoming TCP connections from 1.1.1.1 that are sourced from port 179

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