Fore Systems ES-2810 - Class C Address; Class D Address

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FORE Systems ES-2810 Ethernet Switch User’s Manual
Concepts in Switching
A.6.1.3.5 Class C Address
The class C address comprises a 21-bit network number and a 8-bit host address. The three
highest-order bits are set to
1 1 0. This allows 2072640 class C networks.
A.6.1.3.6 Class D Address
The class D address is used as a multicast address. The four highest-order bits are set to
1 1 1
0
.
NOTE
No addresses are allowed which have the four
highest-order bits set to 1 1 1 1 (also known as
class E address).
Table A.8 - Class C Addresses
1 2 3 4
76543210765432107654321076543210
1 1 0 Network Host Address
Table A.9 - Class D Addresses
1 2 3 4
76543210765432107654321076543210
1 1 1 0 Multicast Address