What is the role of the forwarding table within a router? What is meant by destinationbased forwarding? How does this differ from generalized forwarding?
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The forwarding table is a key component of a router's operation. Its main role is to store information about the next hop to reach a particular destination network. When a packet arrives at a router, the forwarding table is consulted to determine where the packet should be sent next.
Destination-based forwarding refers to the routing technique where a router makes forwarding decisions based solely on the destination IP address of the packet. The forwarding table maps destination IP addresses to the corresponding next-hop router or interface.
On the other hand, generalized forwarding refers to a more advanced routing technique where a router can make forwarding decisions based on multiple factors, such as source IP address, type of service, or protocol. It allows for more granular control over how packets are routed.
In summary, destination-based forwarding is a simple approach where forwarding decisions are solely based on the destination IP address, whereas generalized forwarding offers more flexibility by considering multiple factors for routing decisions.
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