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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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好些人看過Glinka[格林卡]?的電影,內中Richter[李克忒]扮演李斯特在鋼琴上表演,大家異口同聲對于他火暴的表情覺得刺眼。我不知這是由于導演的關系,還是他本人也傾向于琴上動作偏多?記得你十月中來信,說他認為整個的人要跟表情一致。這句話似乎有些毛病,很容易鼓勵彈琴的人身體多搖擺。以前你原是動得很劇烈的,好容易在一九五三年上改了許多。從波蘭寄回的照片上,有幾張可看出你又動得加劇了。這一點希望你注意。傳說李斯特在琴上的戲劇式動作,實在是不可靠的;我讀過一段當時人描寫他的彈琴,說像rock[磐石]一樣。羅賓斯坦(安東)也是身如岩石。唯有肉體靜止,精神的活動才最圓滿︰這是千古不變的定律。在這方面,我很想听听你的意見。 其次,到先生那兒上過課以後,不宜回來馬上在琴上照先生改的就彈,而先要從頭至尾細細看譜,把改的地方從整個曲子上去體會,得到一個新的picture[境界],再在琴上試彈,彈了二三遍,停下來再想再看譜,把老師改過以後的曲子的表達,求得一個明確的picture[境界]。然後再在腦子里把自己原來的picture[境界]與老師改過以後的picture[境界]作個比較,然後再在琴上把兩種不同的境界試彈,細細听,細細辨,究竟哪個更好,還是部分接受老師的,還是全盤接受,還是全盤不接受。不這樣作,很容易“只見其小,不見其大”,光照了老師的一字一句修改,可能通篇不連貫,失去脈絡,弄得支離破碎,非驢非馬,既不像自己,又不像老師,把一個曲子攪得一團糟。1日日啪看视频app 日日啪里的动漫专区 上海政協此次會議與去年五月大會情形大不相同。出席人員不但情緒高漲,而且講話都富有內容,問題提得很多,很具體。(上次大會歌功頌德的空話佔十分之七八。)楊伯伯?代表音樂小組發言,有聲有色,精彩之至。他說明了音樂家的業務進修需要怎麼多的時間,現在各人的忙亂,業務水平天天在後退;他不但說的形象化,而且音響化。休息時間我遇到《文匯報》社長徐鑄成,他說︰“我今天上了一課(音樂常識)。”對社會人士解釋音樂家的勞動性質,是非常必要的。只有在廣大人民認識了這特殊的勞動性質,才能成為一種輿論,督促當局對音樂界的情況慢慢的改善。 日日啪,日日啪影院,日日啪在线影院
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