久草在在线新兔费观看首页久草片免费福利资源站久热在线播放中文字幕自主培育、国内首例的克隆猫“大蒜”诞生

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):

發布時間︰

  “大王很乖啊,從不咬人不說,還會打獵,家里缺肉食的時候不都是大王去林子里抓豬回來給我們吃的嗎?你就一點都不記大王的好?” 第一三四章 往事不可追久草在在线新兔费观看首页   一份文書,雲瑯細細品讀了一個多時辰,睡醒了的張安世飽餐一頓之後又是一副神采奕奕的模樣,雲瑯不得不嘆服張安世干事情的勁頭。久草片免费福利资源站   犬台宮守將見雲瑯意志堅決,就接過腰牌,再次回到了犬台宮。   狗就不一樣了,傷腿之後,就會大聲的慘叫,好引來主人替自己救治。久热在线播放中文字幕   “你說,我如果也去了北疆……”
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