CIDR EXample Network is allocated 8 class c chunks 200.10.0.0to200.10.7.255 Allocation uses 3 bits of class C space Remaining 20 bits are network number, written as201.10.0.0/21 Replaces 8 class C routing entries with 1 combined entry Routing protocols carry prefix with destination network address Longest prefix match for forwarding 9-26-06 Lecture 9: IP Packets 89-26-06 Lecture 9: IP Packets 8 CIDR Example • Network is allocated 8 class C chunks, 200.10.0.0 to 200.10.7.255 • Allocation uses 3 bits of class C space • Remaining 20 bits are network number, written as 201.10.0.0/21 • Replaces 8 class C routing entries with 1 combined entry • Routing protocols carry prefix with destination network address • Longest prefix match for forwarding