天天色好好日视频久草热久草在线视频中发高秋季专题研讨会前瞻 媒体高层对议题这样评价

We are responsible for global coordination of the Internet Protocol addressing systems, as well as the Autonomous System Numbers used for routing Internet traffic.

Currently there are two types of Internet Protocol (IP) addresses in active use: IP version 4 (IPv4) and IP version 6 (IPv6). IPv4 was initially deployed on 1 January 1983 and is still the most commonly used version. IPv4 addresses are 32-bit numbers often expressed as 4 octets in “dotted decimal” notation (for example, 192.0.2.53). Deployment of the IPv6 protocol began in 1999. IPv6 addresses are 128-bit numbers and are conventionally expressed using hexadecimal strings (for example, 2001:0db8:582:ae33::29).

Both IPv4 and IPv6 addresses are generally assigned in a hierarchical manner. Users are assigned IP addresses by Internet service providers (ISPs). ISPs obtain allocations of IP addresses from a local Internet registry (LIR) or National Internet Registry (NIR), or from their appropriate Regional Internet Registry (RIR):

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  軍隊抵達玉門關,陽關,不管是糧秣供應,還是物資供應,等移民到來之後可以做到就地供應。   此人見到了劉陵,瞳孔微微收縮,就抱著劍柄朝劉陵施禮道︰“大漢國西域副使甦武,見過翁主!”天天色   河西四郡想要真正的發展起來,離不開那條偉大的絲綢之路,離不開玉石交易,離不開鐵礦,銅礦交易,更加離不開食鹽交易。好好日视频   弩箭如蝗,清掃軍陣前邊任何敵人,即便是有殘存的敵人,也會被長戟斬殺。   劉徹處理完政事,回到了長信宮,衛氏端來一些茶點,兩人很沒有滋味的吃著。久草热久草在线视频   絕對不是像眼前的這座貳師城一樣,擁有高高的城牆,就算是堅城了。
Map of RIRs
RegistryArea Covered
AFRINICAfrica Region
APNICAsia/Pacific Region
ARINCanada, USA, and some Caribbean Islands
LACNICLatin America and some Caribbean Islands
RIPE NCCEurope, the Middle East, and Central Asia

Our primary role for IP addresses is to allocate pools of unallocated addresses to the RIRs according to their needs as described by global policy and to document protocol assignments made by the IETF. When an RIR requires more IP addresses for allocation or assignment within its region, we make an additional allocation to the RIR. We do not make allocations directly to ISPs or end users except in specific circumstances, such as allocations of multicast addresses or other protocol specific needs.

IP Address Allocations

Internet Protocol Version 4 (IPv4)

Internet Protocol Version 6 (IPv6)

Autonomous System Number Allocations

Procedures

Regional Internet Registry Creation

Technical Documentation