Research Paper

2971 WordsJan 24, 201212 Pages
IPv6 Addressing IPv6 has moved from a 32-bit address space to a 128-bit address space. Therefore the need for Classless Inter-Domain Routing (CIDR) is no longer needed because the number of addresses needed are no longer a concern. The number of address available per person on this planet is approximately 1030. The IPv6 addressing architecture makes a few adjustments to different types of address available to and IP host. There are three types of IPv6 addresses, unicast, multicast, and anycast addresses. The unicast and multicast addresses are similar to the IPv4 versions. However, IPv4 broadcast address is no longer supported and is replaced with a new type of address called anycast. Unicast Unicast is an identifier for a single interface. A packet sent to a unicast address is delivered to the interface identified by that address. A node can have more than one IPv6 network interface. Each separate interface must have its own unicast address associated with it. Contained in the 128-bit field is an address that identifies one interface. 3 | 13 | 8 | 24 | 16 | 64 bits | FP | TLA ID | RES | NLA ID | SLA ID | Interface ID |  FP. The format prefix is the three-bit prefix to the IPv6 address that identifies where it belongs in the IPv6 address space.  TLA ID. The top-level aggregation identifier contains the highest-level routing information of the address. This refers to the grossest level of routing information in the internetwork, and as currently defined (at 13 bits) there can be no more then 8192 different top-level routes.  RES. The next eight bits are reserved for future use.  NLA ID. The next-level aggregation identifier is 24 bits long, and it is meant to be used by organizations that control top-level aggregation Ids to organize that address space.  SLA ID. The

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