Route Summarization
Inclusive Summary Routes
Including subnets that do not currently exist
Find matching bits
Exclusive Summary Routes
excluding all other subnets/routes
split the summary until exclusive (increasing subnet prefix by 1)
Classless Interdomain Routing (CIDR)
Improves scalability on Internet routers' routing tables
Route summarization
Geographic region
Protocols
ICMP - 1
TCP - 6
UDP - 17
EIGRP - 88
OSPF - 89
PIM - 103
RFCs
IP - 791
Subnetting - 950
NAT - 1631
Private addressing - 1918
CIDR - 1517-1520
NICE
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