新浪彩票大乐透走势图表 zst.aicai.com彩票大乐透走势图100期 datachart.500.com彩票大乐透走势图100期 www.cp121.com中国网络出行用户规模逼近5亿人 超2亿人骑共享单车

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︰

  戈壁上最美的時光一般都是黃昏。   馬老六搖頭道︰“沒有誤會,君侯不是這樣的人,我只是離不開這片沙地。”新浪彩票大乐透走势图表 zst.aicai.com   雲瑯見過夏侯靜教羌人孩童的模樣,好多孩童寧願撅著屁股挨夏侯靜手里的藤條,寧願打著赤膊在烈日下給院子拔草,也不願意在沙盤上寫那些難以理解的符號。彩票大乐透走势图100期 datachart.500.com   ……   裴六子說完話,就從懷里掏出一封信遞給了霍光。彩票大乐透走势图100期 www.cp121.com   在看不清局面的情況下,一定不要參與奪嫡之爭,我儒家日後一定要避免此類爭執。
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