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Security Protection
AFBR-1
AFBR-2
AFBR-N
AF(j) Backbone
AF(i)
AF(i)
AF(i)
AF(i)
AF(i)
AF(i)
AF(i)
AF(i)
AF(i)
BGP Update
Static Routing
Packet Filtering
IPsec
TCP MD5
IPsec
S-BGP, soBGP, psBGP
Static Route or
Routing Protocol
Route Reflector
PPT Version