How does the router know about layer 3 or layer 4?

55 pts.
Tags:
ACL
NAT
Networking
Routers
How does the router know about the port number in NAT and in extended ACLs and suppose the Router just know at Layer 3 network layer?
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Packets are forwarded between networks based on layer 3 addresses and layer 4 packets are forwarded using hardware switches

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  • Genderhayes
    Packets are forwarded between networks based on layer 3 addresses and layer 4 packets are forwarded using hardware switches
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  • Genderhayes
    Try configuring  an ACL to select the traffic that you want the secure router OS firewall to NAT
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  • Subhendu Sen
    Assuming this home work based query. If you have real scenario, back with router make/ model/ manufacturer & other details like network design etc.
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