日本高清免费一本视频一本道免费手机线观看日本一本道a不卡免费快讯:猪肉板块异动 *ST雏鹰封涨停

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︰

  “就說了這些?”劉徹進一步追問。   劉徹認為雲瑯說的西北理工是一個天大的謊言,是雲瑯為了遮蓋另外一個謊言而放出來。日本高清免费一本视频   “時間太短,我沒有時間建立一個堅固的堡壘。”雲瑯指著圍繞著烽燧釘下的木樁子有些愧疚。一本道免费手机线观看   霍去病雙手搓一下臉,就有大片干透的血痂子變成粉末掉了下來。   劉徹治理下的大漢——足足讓這個民族驕傲了好幾千年!日本一本道a不卡免费   赫爾度奇怪的看著右賢王道︰“我們還沒有開始戰斗呢,大王怎麼說這樣的喪氣話。”
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