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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):

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傅雷是一個悲劇嗎?我不知道。所有的人好像都不知道。 2018最新在线国产自拍 傅雷說︰“古人有這樣的話︰‘看畫如看美人’。這是說,美人當中,其風神骨相,有在肌體之外者,所以不能單從她的肌體上著眼判斷。看人是這樣,看畫也是這樣。一見即佳,漸看漸倦的,可以稱之為能品。一見平平,漸看漸佳的,可以說是妙品。初看艱澀,格格不入,久而漸領,愈久而愈愛的,那是神品、逸品了。美在皮表,一覽無余,情致淺而意味淡,所以初喜而終厭。美在其中,蘊藉多致,耐人尋味,畫盡意在,這類作品,初看平平,卻能終見妙境。它們或者像高僧隱士,風骨磷峋,森森然,巍巍然,驟見之下,拒人于千里之外一般;或者像木訥之士,平淡天然,空若無物,尋常人必掉首勿顧;面對這類山形物貌,唯有神志專一,虛心靜氣,嚴肅深思,方能于磷峋中見出壯美,于平淡中辨得雋永。正因為它隱藏得深沉,所以不是淺嘗輒止者所能發現;正因為它蓄積厚實,才能探之無盡,叩之不竭。至于說到北宗之作,它的宜于仙山樓觀,海外瑤台,非寫實者可知。後世一般人卻往往被它表面上的金碧色彩所眩惑迷戀,一見稱善,實際上,它那雲山縹緲的景色,如夢如幻的情調,常人未必能夢見于萬一。所以說,對北宗之作,俗人的稱譽贊賞,正與貶毀不屑一樣的不當。”久久偷拍国产在线视频 當時,傅雷正在跟一位名叫瑪德琳的法國女郎熱戀。 爸爸媽媽一本道电影
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