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5.2.4 Determining the Next Hop Address Connected: An Internet Encyclopedia
5.2.4 Determining the Next Hop Address

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Next: 5.2.4.1 IP Destination Address

5.2.4 Determining the Next Hop Address

5.2.4 Determining the Next Hop Address

When a router is going to forward a packet, it must determine whether it can send it directly to its destination, or whether it needs to pass it through another router. If the latter, it needs to determine which router to use. This section explains how these determinations are made.

This section makes use of the following definitions:

  • LSRR - IP Loose Source and Record Route option

  • SSRR - IP Strict Source and Record Route option

  • Source Route Option - an LSRR or an SSRR

  • Ultimate Destination Address - where the packet is being sent to: the last address in the source route of a source-routed packet, or the destination address in the IP header of a non-source-routed packet

  • Adjacent - reachable without going through any IP routers

  • Next Hop Address - the IP address of the adjacent host or router to which the packet should be sent next

  • IP Destination Address - the ultimate destination address, except in source routed packets, where it is the next address specified in the source route

  • Immediate Destination - the node, System, router, end-system, or whatever that is addressed by the IP Destination Address.


Next: 5.2.4.1 IP Destination Address

Connected: An Internet Encyclopedia
5.2.4 Determining the Next Hop Address

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