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Networking-10: NAT (Disadvantages (End-to-end functionality degraded, End…
Networking-10: NAT
Disadvantages
End-to-end functionality degraded
End-to-end IP traceability is lost
Performance degraded
Tunneling becomes more complicated
Initiating TCP connections can be disrupted
NAT Address
Inside global address
Outside local address
Inside local address
Outside global address
Advantages
Increase flexibility of connections to public network
Provides consistency for internal network addressing scheme
Conserve legally registered addressing scheme
Provides network security
NAT Translations
Dynamic address translation (dynamic NAT)
Port address translation (PAT)
Static address translation (static NAT)
Port Forwading
Forward network port from one network node to another
Users access internal severs by using WAN port address of router and matched external port number
Allows external user to reach port on private IPv4 address from outside through NAT-enabled router
Introduction
Functions
Allows network to use private IPv4 address internally
Provide translation to public address when needed
Benefits
Conserve public IPv4 address
Adding privacy and security to network