99热精品手机在线视频1717国产精品在线观看99re热这里有精品首页久久精品视在线观看2上半年外资大手笔入A股 北上资金本周净入超百亿元

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︰

  曹襄一邊向外走,一邊氣咻咻的道︰“天亮之後就會有臨近的左大營兵馬來攻打我扶荔城里的叛匪!” 99热精品手机在线视频   此時此刻,長門宮外的戰事愈發的慘烈,上萬人在一片不足三里地的空間里廝殺,直殺的天昏地暗,日月無光。1717国产精品在线观看99re热这里有精品首页   鐘離遠奇怪的看了曹襄一眼道︰“我從來就沒有怪罪過他,我走到今日難道不是我自己選擇的麼?”   揭發逃奴最熱心的人並非漢人,而是數量最多的羌人。久久精品视在线观看2   劉徹對這條讓前秦五谷豐登的河渠並不滿意,如果不是因為明年就要大征,他就準備在涇水上再開鑿一條河渠,這條河渠起自谷口尾入櫟陽,最後注入渭水。
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