Lucent Technologies SLC ConnectReach User & Service Manual page 454

IP Network Addresses
IP Network Addresses Description
Address Classes (Continued)
Class D networks
Class E networks
A-6 Issue 4 June 2002
IP multicasting uses class D network addresses. As shown in the following figure,
class D networks use the uppermost 4 bits as 1,1,1,0. The remaining 28 bits are
used for multicast groups of computers. RFC 1112 describes multicast groups.
1
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
1 1 1 0
The following table lists the address range and status.
$GGUHVV 5DQJH
 WKURXJK

As shown in the following figure, class E networks use the uppermost 4 bits as
1,1,1,1. Class E networks are reserved for future use. The only class E address
currently used is 255.255.255.255, which is a global broadcast address.
1
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
1 1 1 1
2
Multicast Address
6WDWXV
5HVHUYHG IRU XVH E\
,3 PXOWLFDVW WUDIILF
2
Reserved
363-208-050
3
3