请输入您要查询的百科知识：

　

词条 Cogent Communications
释义

  1. Acquisition history

  2. Peering

  3. References

  4. External links

{{Infobox company
| name = Cogent Communications Holdings, Inc.
| logo =
| type = Public |
| traded_as = {{NASDAQ|CCOI}}
S&P 600 Component
| foundation = 1999
| location = Washington, D.C., U.S.
| key_people = Dave Schaeffer {{small|(CEO)}}/Founder/President
| industry = Telecommunications
| products =
| revenue = {{Increase}} {{US$|485.175 million|link=yes}} (2017)[1]
| operating_income = {{Increase}} {{US$|75.918 million|link=yes}} (2017)[1]
| net_income = {{Increase}} {{US$|5.876 million|link=yes}} (2017)[1]
| assets = {{Decrease}} {{US$|710.588 million|link=yes}} (2017)[1]
| equity = {{Decrease}} {{US$|62.857 million|link=yes}} (2017)[1][2]
| num_employees = 897[1] {{small|(February 1, 2017)}}
| homepage = www.cogentco.com
| footnotes =
}}{{Infobox NSP
| asn = 174
}}Cogent Communications is a multinational internet service provider based in the United States. Cogent's primary services consist of Internet access and data transport, offered on a fiber optic, IP data-only network, along with colocation in data centers.[3]

Cogent's Autonomous System (AS) number, 174, which is its collection of connected Internet Protocol (IP) routing prefixes, has one of the highest-ranked connectivity degrees on the Internet.[4][5] This indicates a high level of connectivity with other network nodes.

Acquisition history

Cogent was founded in 1999 at the peak of the industry's growth and was funded by angel investors including members of Keiretsu Forum.[6] In three years, Cogent acquired 13 other failing carriers, purchasing $14 billion in capital for $60 million, including $4 billion worth of Property, Plant and Equipment.[7]

  • September 2001 – Acquires the assets of NetRail[6]
  • February 2002 – Acquires Allied Riser[8][9]
  • April 2002 – Acquires Building Access Agreements from OnSite Access
  • April 2002 – Acquires Major US Assets of PSINet[10]
  • September 2002 – Acquires Major Assets of FiberCity Networks
  • February 2003 – Acquires Fiber Network Solutions[11]
  • May 2003 – Acquires Assets of Applied Theory
  • January 2004 – Acquires LambdaNet France & Spain[12]
  • March 2004 – Acquires Fiber Network and Equipment in Germany Out of Former Carrier1 Assets[13]
  • September 2004 – Acquires Global Access[14]
  • October 2004 – Acquires Aleron Broadband[15]
  • December 2004 – Acquires NTT/Verio Dedicated Access Business in U.S.[16]

Peering

Cogent has been controversial in the ISP market for low bandwidth pricing and its public disputes over peering with AOL (2003),[17] Level 3 Communications (2005),[18] France Telecom (2006),[19] Limelight Networks (2007),[20] Telia Carrier (March 2008),[21] and Sprint Nextel (October 2008).[22]

On March 14, 2008, after Cogent stopped routing packets from European network provider Telia (AS 1299), their two networks lost mutual connectivity.[21] The connection was reestablished March 28, 2008 with interconnection points in both the United States and Europe.[23]

On June 6, 2011, Cogent automatically stopped peering with The Department of Energy Sciences Network (ESnet) causing a disruption for 3 days.[24]

In November 2015, CenturyLink signed a new long-term bilateral interconnection agreement with Cogent Communications.[25]

Cogent has yet to agree on peering with the biggest IPv6 connectivity provider, Hurricane Electric. As of March 2016, direct connectivity between the two networks is impossible.[26] Cogent and Google have also stopped IPv6 peering in 2016.[27] This is rumored to be closely tied to Cogent leveraging Google's IPv4 traffic via a paid customer or to maintain Settlement-Free Interconnect with another network.[28]

In February 2017, Cogent blocked many piracy and streaming sites including The Pirate Bay.[29] This was unintentional due to a poorly crafted Spanish court order.[30]

References

1. ^1 2 3 4 5 {{cite web |url=https://www.sec.gov/Archives/edgar/data/1158324/000104746918000988/a2234130z10-k.htm|title=2017 Cogent Communications SEC Form 10-K |publisher=Securities and Exchange Commission|accessdate=2019-01-08}}
2. ^{{cite web |url=https://www.sec.gov/Archives/edgar/data/1158324/000104746917000932/a2230971z10-k.htm|title=2016 Cogent Communications SEC Form 10-K |publisher=Securities and Exchange Commission|accessdate=2019-01-08}}
3. ^{{cite web|url=http://pdf.secdatabase.com/2094/0001104659-12-075320.pdf |title=Cogent Communications, Form 10-Q, Quarterly Report, Filing Date Nov 7, 2012 |publisher=secdatabase.com |accessdate =Mar 27, 2013}}
4. ^Visualizing Internet Topology at a Macroscopic Scale April 2005
5. ^AS ranking
6. ^1 {{cite web|url=http://pdf.secdatabase.com/2465/0000912057-01-535608.pdf |title=Cogent Communications, Form S-4, Filing Date Oct 16, 2001 |publisher=secdatabase.com |accessdate =Mar 27, 2013}}
7. ^Lightwave – Cogent Communications banks on Ethernet over IP
8. ^{{cite web|url=http://pdf.secdatabase.com/476/0000912057-01-530620.pdf |title=Cogent Communications, Form 425, Filing Date Aug 29, 2001 |publisher=secdatabase.com |accessdate=Mar 27, 2013}}
9. ^{{cite web|url=http://edgar.secdatabase.com/2955/91205702003942/filing-main.htm |title=Cogent Communications, Form 8-K, Current Report, Filing Date Feb 5, 2002 |publisher=secdatabase.com |accessdate=Mar 27, 2013}}
10. ^{{cite web |url=http://edgar.secdatabase.com/659/91205702013642/filing-main.htm |title=Cogent Communications, Form 8-K, Current Report, Filing Date Apr 4, 2002 |publisher=secdatabase.com |accessdate=Mar 27, 2013}}
11. ^{{cite web |url=http://pdf.secdatabase.com/2083/0001104659-03-003334.pdf |title=Cogent Communications, Form 8-K, Current Report, Filing Date Mar 3, 2003 |publisher=secdatabase.com |accessdate=Mar 27, 2013}}
12. ^{{cite web |url=http://edgar.secdatabase.com/411/110465904000329/filing-main.htm |title=Cogent Communications, Form 8-K, Current Report, Filing Date Jan 8, 2004 |publisher=secdatabase.com |accessdate=Mar 27, 2013}}
13. ^{{cite web|url=http://pdf.secdatabase.com/2383/0001047469-04-010288.pdf |title=Cogent Communications, Form 8-K, Current Report, Filing Date Mar 31, 2004 |publisher=secdatabase.com |accessdate=Mar 27, 2013}}
14. ^{{cite web|url=http://edgar.secdatabase.com/997/110465904027906/filing-main.htm |title=Cogent Communications, Form 8-K, Current Report, Filing Date Sep 17, 2004 |publisher=secdatabase.com |accessdate=Mar 27, 2013}}
15. ^{{cite web|url=http://pdf.secdatabase.com/2751/0001104659-04-032659.pdf |title=Cogent Communications, Form 8-K, Current Report, Filing Date Oct 29, 2004 |publisher=secdatabase.com |accessdate=Mar 27, 2013}}
16. ^{{cite web |url=http://edgar.secdatabase.com/2420/110465904038326/filing-main.htm |title=Cogent Communications, Form 8-K, Current Report, Filing Date Dec 3, 2004 |publisher=secdatabase.com |accessdate=Mar 27, 2013}}
17. ^{{cite news | last=Noguchi | first=Yuki | title='Peering' Dispute With AOL Slows Cogent Customer Access | publisher=Washington Post | date=2002-12-27 | url=https://archive.is/OGao | accessdate=2017-10-06}}
18. ^Cogent Press release Level3 dispute Oct 7 2005
19. ^{{cite news | last=Kuri | first=Jürgen | author2=Smith, Robert W. | title=France Telecom severs all network links to competitor Cogent | publisher=Heise online | date=2005-04-21 | url=http://morse.colorado.edu/~epperson/courses/routing-protocols/handouts/cogent-ft.html | accessdate=2006-09-28}}
20. ^{{cite news|last1=Miller|first1=Rich|title=Cogent De-peers Limelight Networks {{!}} Data Center Knowledge|url=http://www.datacenterknowledge.com/archives/2007/09/30/cogent-de-peers-limelight-networks/|accessdate=15 August 2017|work=Data Center Knowledge|date=30 September 2007}}
21. ^1 The Telia-Cogent Spat Could Ruin the Web For Many, Om Malik, 2008-03-14
22. ^Sprint-Nextel Severs Its Internet Connection to Cogent Communications
23. ^Telia resolves internet dispute {{webarchive|url=https://web.archive.org/web/20080607080053/http://www.thelocal.se/10786/20080330/ |date=2008-06-07 }}, http://thelocal.se, Peter Vinthagen Simpson, 2008-03-30
24. ^[https://web.archive.org/web/20110611002310/http://es.net/news-and-publications/important-status-regarding-cogent-connectivity/ Important: Status regarding Cogent connectivity], Energy Sciences Network press release, Steve Cotter, Lawrence Berkeley National Lab
25. ^{{Cite web|url=https://www.fiercetelecom.com/telecom/centurylink-cogent-sign-new-interconnection-agreement|title=CenturyLink, Cogent sign new interconnection agreement {{!}} FierceTelecom|website=www.fiercetelecom.com|language=en|access-date=2018-06-27}}
26. ^E-mail from Hurricane Electric explaining why the two networks are severed on the nanog (North American Network Operators Group) mailing list
27. ^adminhacks.org, March 2016
28. ^{{Cite web|url=https://mailman.nanog.org/pipermail/nanog/2016-February/084267.html|title=Cogent & Google IPv6|last=Murenin|first=Constantine A.|date=2017-02-25|access-date=2017-03-02}}
29. ^{{cite news|title=Internet Backbone Provider Cogent Blocks Pirate Bay and other "Pirate" Sites - TorrentFreak|url=https://torrentfreak.com/internet-backbone-provider-cogent-blocks-pirate-bay-and-other-pirate-sites-170209/|work=TorrentFreak|date=9 February 2017}}
30. ^{{Cite news|url=https://arstechnica.com/tech-policy/2017/02/a-court-order-blocked-pirate-sites-that-werent-supposed-to-be-blocked/|title=A court order blocked pirate sites that weren’t supposed to be blocked|work=Ars Technica|access-date=2017-03-02|language=en-us}}

External links

  • Official site
  • Cogent Communications SEC Filings

4 : Internet service providers of the United States|Companies based in Washington, D.C.|Transit-free networks|Companies listed on NASDAQ
随便看

　

开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。

　

Copyright © 2023 OENC.NET All Rights Reserved
京ICP备2021023879号 更新时间：2024/9/27 5:47:16