Q - Z

RFC.

Request For Comments. A document series that is the primary means of communicating information about the Internet. Some RFCs are designated by the IAB as Internet standards. Most RFCs document protocol specifications.

RIPE NCC.

Réseaux IP Européens Network Coordination Center. One of the three regional Internet registries in the world that can allocate production IPv6 spaces to ISPs. RIPE NCC covers Europe and the Middle East.

RIPng.

Routing Information Protocol next generation. An enhanced version of RIP that supports IPv6. RIPng is an IGP. See RFC 2080.

router advertisement (RA).

An ICMPv6 type 134 message sent periodically on the local link by an IPv6 router or upon request of a router solicitation message. The router advertisement message in IPv6 contains the IPv6 prefixes, valid and preferred lifetimes of prefixes, default router information, and some flags and options for nodes.

router solicitation (RS).

An ICMPv6 type 133 message used by an IPv6 node to request the sending of router advertisement messages by an IPv6 router.

site-local address.

A unicast IPv6 address that can be used only within a site scope. Site-local addresses are based on the IPv6 prefix fec0::/10. Site-local address are similar to private address space in IPv4.

solicited-node multicast address.

A multicast IPv6 address within the multicast scope that is automatically enabled on the interface for each unicast and anycast address assigned. Solicited-node multicast addresses are used in IPv6 to replace ARP and in duplicate address detection. Solicited-node multicast addresses in IPv6 are based on the prefix FF02::1:FF00:0000/104.

stateless autoconfiguration.

An IPv6 mechanism that allows nodes to configure their IPv6 addresses by themselves using router advertisement messages received.

traffic class.

A field of the basic IPv6 header that is similar to the Type of Service field in the IPv4 header.

unspecified address.

A unicast IPv6 address that is not assigned to any interface. The unspecified address in IPv6 is represented by ::0/128 and indicates the absence of an IPv6 address. Unspecified addresses are used by some IPv6 mechanisms.