IP Addressing
· Octet (8-bit)
boundaries are used to
partition an
address into prefix and suffix
· Class A,
B and C are primary classes
· Used for ordinary host
addressing
· Class D is used for multicast, a limited
form of
broadcast
· Internet hosts join a multicast
group
· Packets are delivered to
all members of
group
· Routers manage delivery of
single packet
from source to all members of multicast
group
· Used for MBone (multicast backbone)
· Class E is reserved ( for future use)
· IP software computes the class of the
destination address when it receives a packet.
· IP addresses are self-identifying because the
class can be computed directly from the first few bits of the address
· The first 4 (leading) bits of the address
denote the class:
–Class A begins with 0
–Class B begins with 10
–Class C begins with 110
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