The Internet is far too large for any router to hold routing information for all destinations. How does the Internet routing scheme deal with this issue?
What will be an ideal response?
If a router does not find the network id portion of a destination address in its routing table, it despatches the packet to a default address an adjacent gateway or router that is designated as responsible for routing packets for which there is no routing information available. Each router’s default address carries such packets towards a router than has more complete routing information, until one is encountered that has a specific entry for the relevant network id.
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