亚洲天堂2017手机在线亚洲欧美在线亚洲黄色网教得好没论文也能评教授 多地高校职称评审在改革

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︰

  “我能學?”   這孩子最近在吃初乳,是她成長起來之後最重要的免疫來源,現在吃豆腐,會把孩子肚子里的有益菌群破壞掉。亚洲天堂2017手机在线   “放心,雲氏是出了名的好人家,從不欺騙良善,听我老申的,今天呢,就換糧食,換成高粱或者糜子,夠兩口人吃三天的,攢夠過冬的糧食之後呢,再想別的。”亚洲欧美在线   “準備好去哪里?”衛青依舊是一副雲淡風輕的模樣,就像是在問霍去病春游去哪里一般。   把酒杯從雪洞里掏出來,酒溫正好。亚洲黄色网   說到這里有對雲瑯道︰“河曲之戰,某家攜各色牲畜六十五萬縱橫兩千里,折損卻不到一成,你敬獻的馬蹄鐵居功甚偉。雙邊馬鐙取代單邊馬鐙也極大的緩解了大軍長途跋涉之苦,算是一項不錯的善政。說來可笑,以前騎兵之所以全是單邊馬鐙,是因為國朝缺少銅器,沒想到便宜的鐵器橫行之後,居然沒有一個人認為馬鐙本該就是雙面的。”
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