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In page Routing Information Protocol:

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RIPng (RIP next generation) is an extension of RIPv2 for support of IPv6, the next generation Internet Protocol.[1] The main differences between RIPv2 and RIPng are:

  • Support of IPv6 networking.
  • While RIPv2 supports RIPv1 updates authentication, RIPng does not. IPv6 routers were, at the time, supposed to use IPsec for authentication.[citation needed]
  • RIPv2 encodes the next-hop into each route entry, RIPng requires specific encoding of the next hop for a set of route entries.