Chris McKee
Direktor/Vorstandsmitglied bei COOL TECHNOLOGIES, INC.
Vermögen: 222 $ am 30.04.2024
Aktive Beziehungen
| Name | Geschlecht | Alter | Unternehmensverbindungen | Zusammenarbeit |
|---|---|---|---|---|
| Michael Thomas Sicoli | M | 54 |
Interoute Networks Ltd.
 Interoute Networks Ltd. Packaged SoftwareTechnology Services Part of GTT Communications, Inc., Interoute Networks Ltd. is a British company that develops an enterprise digital platform for digital transformation. The company is based in London, UK. Interoute Networks was founded in 1999.
Interoute Application Management Ltd.
 Interoute Application Management Ltd. Information Technology ServicesTechnology Services Interoute Application Management Ltd. provides information technology services. Its services include database support and managed services, project delivery, remote systems management and training/skills transfer. The company was founded in 2002 and is headquartered in London, the United Kingdom.
GTT - EMEA Ltd.
 GTT - EMEA Ltd. Specialty TelecommunicationsCommunications GTT - EMEA Ltd. provides data and technology services. It offers design integration, project management, network monitoring and support services. The company was founded by Christopher Britton and Adriana Cassandro in 1998 and is headquartered in London, the United Kingdom. | 6 Jahre |
| Judson William Bibb | M | 67 | 13 Jahre | |
| Timothy J. Hassett | M | 63 | 22 Jahre | |
| Jessica Anne Kaman | F | 50 |
Interoute Networks Ltd.
Interoute Networks Ltd. Packaged SoftwareTechnology Services Part of GTT Communications, Inc., Interoute Networks Ltd. is a British company that develops an enterprise digital platform for digital transformation. The company is based in London, UK. Interoute Networks was founded in 1999.
Interoute Application Management Ltd.
Interoute Application Management Ltd. Information Technology ServicesTechnology Services Interoute Application Management Ltd. provides information technology services. Its services include database support and managed services, project delivery, remote systems management and training/skills transfer. The company was founded in 2002 and is headquartered in London, the United Kingdom.
GTT - EMEA Ltd.
GTT - EMEA Ltd. Specialty TelecommunicationsCommunications GTT - EMEA Ltd. provides data and technology services. It offers design integration, project management, network monitoring and support services. The company was founded by Christopher Britton and Adriana Cassandro in 1998 and is headquartered in London, the United Kingdom. | 6 Jahre |
| Julie A. Halpin | F | - |
The Geppetto Group
 The Geppetto Group Advertising/Marketing ServicesCommercial Services The Geppeto Group provides advertising and marketing services to kids and teens. It offers creative development services for broadcast, print advertising, campaign planning and management services. The company was founded by Julie Halpin in September, 1997 and is located in New York, NY. | 27 Jahre |
| Donald L. Bowman | M | 55 | 9 Jahre | |
| H. Thompson | M | 84 |
GTT - EMEA Ltd.
GTT - EMEA Ltd. Specialty TelecommunicationsCommunications GTT - EMEA Ltd. provides data and technology services. It offers design integration, project management, network monitoring and support services. The company was founded by Christopher Britton and Adriana Cassandro in 1998 and is headquartered in London, the United Kingdom. | - |
| Rachel Geller | F | - |
The Geppetto Group
The Geppetto Group Advertising/Marketing ServicesCommercial Services The Geppeto Group provides advertising and marketing services to kids and teens. It offers creative development services for broadcast, print advertising, campaign planning and management services. The company was founded by Julie Halpin in September, 1997 and is located in New York, NY. | - |
| Jennifer Goodman | F | - |
The Geppetto Group
The Geppetto Group Advertising/Marketing ServicesCommercial Services The Geppeto Group provides advertising and marketing services to kids and teens. It offers creative development services for broadcast, print advertising, campaign planning and management services. The company was founded by Julie Halpin in September, 1997 and is located in New York, NY. | - |
| Daniel M. Fraser | M | - |
Hibernia International Assets, Inc.
 Hibernia International Assets, Inc. Major TelecommunicationsCommunications Hibernia International Assets, Inc. is a Caymanian company that provides fiber optic telecommunication services. The company is based in George Town, Cayman Islands. The company was founded in 2002. | - |
| Steven P. Wilburn | M | 75 | 4 Jahre | |
| Michael Paul Winston | M | 41 |
Hibernia International Assets, Inc.
Hibernia International Assets, Inc. Major TelecommunicationsCommunications Hibernia International Assets, Inc. is a Caymanian company that provides fiber optic telecommunication services. The company is based in George Town, Cayman Islands. The company was founded in 2002. | - |
Beziehungs-Chart
Beziehungen zu mehreren Unternehmen
Ehemalige Beziehungen
| Name | Geschlecht | Alter | Unternehmensverbindungen | Zusammenarbeit |
|---|---|---|---|---|
| Nathaniel Davis | M | 70 |
XO Communications, Inc.
 XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 3 Jahre |
| Duane W. Albro | M | 77 |
Net2000 Communications, Inc.
 Net2000 Communications, Inc. Specialty TelecommunicationsCommunications Net2000 Communications, Inc. provides broadband telecommunications services. It offers an integrated package of high-speed data services, video services, Internet services, local telephone services and long distance services. The company is headquartered in Herndon, VA. | 1 Jahre |
| Daniel Akerson | M | 75 |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 4 Jahre |
| Dick Schul | M | 77 | 8 Jahre | |
| Craig McCaw | M | 74 |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 28 Jahre |
| Mark Mendes | M | 61 |
Net2000 Communications, Inc.
Net2000 Communications, Inc. Specialty TelecommunicationsCommunications Net2000 Communications, Inc. provides broadband telecommunications services. It offers an integrated package of high-speed data services, video services, Internet services, local telephone services and long distance services. The company is headquartered in Herndon, VA. | 4 Jahre |
| Mark Michael Hodowanec | M | 59 | 17 Jahre | |
| Susan M. Crawford | F | 65 |
Fusion MPHC Group, Inc. (Delaware)
 Fusion MPHC Group, Inc. (Delaware) Specialty TelecommunicationsCommunications Fusion MPHC Group, Inc. provides integrated voice and data communication services. It offers broadband Internet access service for small and mid-sized businesses; business phone and Internet services; VPN and security services; email and web hosting services; and enterprise solutions. The firm also provides voice over IP, wireless and voice services on a managed national broadband network, wholesale and carrier services. The company is headquartered in DE. | 3 Jahre |
| Chris A. Dunn | M | - |
Fusion MPHC Group, Inc. (Delaware)
Fusion MPHC Group, Inc. (Delaware) Specialty TelecommunicationsCommunications Fusion MPHC Group, Inc. provides integrated voice and data communication services. It offers broadband Internet access service for small and mid-sized businesses; business phone and Internet services; VPN and security services; email and web hosting services; and enterprise solutions. The firm also provides voice over IP, wireless and voice services on a managed national broadband network, wholesale and carrier services. The company is headquartered in DE. | 2 Jahre |
| Richard Bear | M | 61 |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 7 Jahre |
| Dan D. Tompkins | M | - |
StarVox Communications, Inc.
 StarVox Communications, Inc. Specialty TelecommunicationsCommunications StarVox Communications, Inc. is engaged in the provision of telecommunications services. The company was founded on July 30, 1991 and is headquartered in San Jose, CA. | - |
| James L. Isaacs | M | 64 |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 2 Jahre |
| Benjamin R. Preston | M | 52 |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 2 Jahre |
| Douglas L. Sobieski | M | - |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 9 Jahre |
| Heather Burnett Gold | F | 70 |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 2 Jahre |
| Robert Knauss | M | 94 |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 2 Jahre |
| Donn Dobkin | M | 63 |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 3 Jahre |
| Gary Begeman | M | 65 |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 4 Jahre |
| John H. Jacquay | M | 71 |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 2 Jahre |
| Reese K. Feuerman | M | - |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 2 Jahre |
| Thomas W. Cady | M | 67 |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | - |
| William H. Weber | M | - |
Fusion MPHC Group, Inc. (Delaware)
Fusion MPHC Group, Inc. (Delaware) Specialty TelecommunicationsCommunications Fusion MPHC Group, Inc. provides integrated voice and data communication services. It offers broadband Internet access service for small and mid-sized businesses; business phone and Internet services; VPN and security services; email and web hosting services; and enterprise solutions. The firm also provides voice over IP, wireless and voice services on a managed national broadband network, wholesale and carrier services. The company is headquartered in DE. | 4 Jahre |
| Dayna Parker | F | - |
Net2000 Communications, Inc.
Net2000 Communications, Inc. Specialty TelecommunicationsCommunications Net2000 Communications, Inc. provides broadband telecommunications services. It offers an integrated package of high-speed data services, video services, Internet services, local telephone services and long distance services. The company is headquartered in Herndon, VA. | 3 Jahre |
| Craig Collins | M | 60 |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 3 Jahre |
| Steven A. Ednie | M | 55 |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 5 Jahre |
| Micah Sanders Porter | M | - |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 6 Jahre |
| Margaret Rosas | F | - |
Dow Lohnes PLLC
 Dow Lohnes PLLC Miscellaneous Commercial ServicesCommercial Services Dow Lohnes PLLC provides legal services. Its practice areas include intellectual property, taxation, compensation and employee benefits, as well as specialty practices in aviation, election law, real estate and sports law. The company was founded in 1918 and is headquartered in Washington, DC. | 4 Jahre |
| Gary S. Lutzker | M | - |
Dow Lohnes PLLC
Dow Lohnes PLLC Miscellaneous Commercial ServicesCommercial Services Dow Lohnes PLLC provides legal services. Its practice areas include intellectual property, taxation, compensation and employee benefits, as well as specialty practices in aviation, election law, real estate and sports law. The company was founded in 1918 and is headquartered in Washington, DC. | 17 Jahre |
| William Garrahan | M | 66 |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 2 Jahre |
| Kathleen Morgan | F | 56 |
Dickstein Shapiro LLP
 Dickstein Shapiro LLP Miscellaneous Commercial ServicesCommercial Services Dickstein Shapiro LLP provides legal services. Its areas of practice include corporate law, litigation and dispute resolution, energy, intellectual property, and regulatory affairs. The company was founded in 1953 and is headquartered in Washington, DC. | 4 Jahre |
| Carl Grivner | M | 71 |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 3 Jahre |
| Alan Howe | M | 62 |
Fusion MPHC Group, Inc. (Delaware)
Fusion MPHC Group, Inc. (Delaware) Specialty TelecommunicationsCommunications Fusion MPHC Group, Inc. provides integrated voice and data communication services. It offers broadband Internet access service for small and mid-sized businesses; business phone and Internet services; VPN and security services; email and web hosting services; and enterprise solutions. The firm also provides voice over IP, wireless and voice services on a managed national broadband network, wholesale and carrier services. The company is headquartered in DE. | 3 Jahre |
| Robert Ellin | M | 58 |
StarVox Communications, Inc.
StarVox Communications, Inc. Specialty TelecommunicationsCommunications StarVox Communications, Inc. is engaged in the provision of telecommunications services. The company was founded on July 30, 1991 and is headquartered in San Jose, CA. | - |
| John S. Reiland | M | 74 |
StarVox Communications, Inc.
StarVox Communications, Inc. Specialty TelecommunicationsCommunications StarVox Communications, Inc. is engaged in the provision of telecommunications services. The company was founded on July 30, 1991 and is headquartered in San Jose, CA. | 1 Jahre |
| Richard Jalkut | M | 79 |
Fusion MPHC Group, Inc. (Delaware)
Fusion MPHC Group, Inc. (Delaware) Specialty TelecommunicationsCommunications Fusion MPHC Group, Inc. provides integrated voice and data communication services. It offers broadband Internet access service for small and mid-sized businesses; business phone and Internet services; VPN and security services; email and web hosting services; and enterprise solutions. The firm also provides voice over IP, wireless and voice services on a managed national broadband network, wholesale and carrier services. The company is headquartered in DE. | 3 Jahre |
| Clyde A. Heintzelman | M | 85 |
Net2000 Communications, Inc.
Net2000 Communications, Inc. Specialty TelecommunicationsCommunications Net2000 Communications, Inc. provides broadband telecommunications services. It offers an integrated package of high-speed data services, video services, Internet services, local telephone services and long distance services. The company is headquartered in Herndon, VA. | 2 Jahre |
| Theodore H. Banzhaf | M | 59 | 4 Jahre | |
| Fredrik G. Gradin | M | 62 |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 2 Jahre |
| Keith Meister | M | 51 |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 3 Jahre |
| Barry I. Regenstein | M | 66 |
StarVox Communications, Inc.
StarVox Communications, Inc. Specialty TelecommunicationsCommunications StarVox Communications, Inc. is engaged in the provision of telecommunications services. The company was founded on July 30, 1991 and is headquartered in San Jose, CA. | 3 Jahre |
| John Trewin | M | - |
Fusion MPHC Group, Inc. (Delaware)
Fusion MPHC Group, Inc. (Delaware) Specialty TelecommunicationsCommunications Fusion MPHC Group, Inc. provides integrated voice and data communication services. It offers broadband Internet access service for small and mid-sized businesses; business phone and Internet services; VPN and security services; email and web hosting services; and enterprise solutions. The firm also provides voice over IP, wireless and voice services on a managed national broadband network, wholesale and carrier services. The company is headquartered in DE. | - |
| Vincent Intrieri | M | 67 |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 3 Jahre |
| Diana Einterz Leonard | F | 65 |
Fusion MPHC Group, Inc. (Delaware)
Fusion MPHC Group, Inc. (Delaware) Specialty TelecommunicationsCommunications Fusion MPHC Group, Inc. provides integrated voice and data communication services. It offers broadband Internet access service for small and mid-sized businesses; business phone and Internet services; VPN and security services; email and web hosting services; and enterprise solutions. The firm also provides voice over IP, wireless and voice services on a managed national broadband network, wholesale and carrier services. The company is headquartered in DE. | - |
| Lisa Hook | F | 66 |
Fusion MPHC Group, Inc. (Delaware)
Fusion MPHC Group, Inc. (Delaware) Specialty TelecommunicationsCommunications Fusion MPHC Group, Inc. provides integrated voice and data communication services. It offers broadband Internet access service for small and mid-sized businesses; business phone and Internet services; VPN and security services; email and web hosting services; and enterprise solutions. The firm also provides voice over IP, wireless and voice services on a managed national broadband network, wholesale and carrier services. The company is headquartered in DE. | 2 Jahre |
| Carl Icahn | M | 88 |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 3 Jahre |
| Richard A. Montfort | M | 63 |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 5 Jahre |
| Eric G. Weiss | M | 57 |
Fusion MPHC Group, Inc. (Delaware)
Fusion MPHC Group, Inc. (Delaware) Specialty TelecommunicationsCommunications Fusion MPHC Group, Inc. provides integrated voice and data communication services. It offers broadband Internet access service for small and mid-sized businesses; business phone and Internet services; VPN and security services; email and web hosting services; and enterprise solutions. The firm also provides voice over IP, wireless and voice services on a managed national broadband network, wholesale and carrier services. The company is headquartered in DE. | 2 Jahre |
| Dennis Weibling | M | 72 |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 7 Jahre |
| Nicolas Kauser | M | 83 |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 3 Jahre |
| R. Gerard Salemme | M | 69 |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 6 Jahre |
| Mark W. Fisher | M | 64 |
XO Communications, Inc.
XO Communications, Inc. Specialty TelecommunicationsCommunications XO Communications, Inc. used to provides voice, data and IP services. It was offering services such as local and long distance voice, internet access, private networking, data transport and web hosting. The company was located in Reston, VA. | 3 Jahre |
| Hellene Runtagh | F | 75 |
Fusion MPHC Group, Inc. (Delaware)
Fusion MPHC Group, Inc. (Delaware) Specialty TelecommunicationsCommunications Fusion MPHC Group, Inc. provides integrated voice and data communication services. It offers broadband Internet access service for small and mid-sized businesses; business phone and Internet services; VPN and security services; email and web hosting services; and enterprise solutions. The firm also provides voice over IP, wireless and voice services on a managed national broadband network, wholesale and carrier services. The company is headquartered in DE. | 7 Jahre |
| Daniel C. Ustian | M | 73 | 5 Jahre | |
| Robert M. Neumeister | M | 74 |
Fusion MPHC Group, Inc. (Delaware)
Fusion MPHC Group, Inc. (Delaware) Specialty TelecommunicationsCommunications Fusion MPHC Group, Inc. provides integrated voice and data communication services. It offers broadband Internet access service for small and mid-sized businesses; business phone and Internet services; VPN and security services; email and web hosting services; and enterprise solutions. The firm also provides voice over IP, wireless and voice services on a managed national broadband network, wholesale and carrier services. The company is headquartered in DE. | 2 Jahre |
| Robert W. Bannon | M | 59 |
Net2000 Communications, Inc.
Net2000 Communications, Inc. Specialty TelecommunicationsCommunications Net2000 Communications, Inc. provides broadband telecommunications services. It offers an integrated package of high-speed data services, video services, Internet services, local telephone services and long distance services. The company is headquartered in Herndon, VA. | 1 Jahre |
| Megan Doberneck | F | - |
Fusion MPHC Group, Inc. (Delaware)
Fusion MPHC Group, Inc. (Delaware) Specialty TelecommunicationsCommunications Fusion MPHC Group, Inc. provides integrated voice and data communication services. It offers broadband Internet access service for small and mid-sized businesses; business phone and Internet services; VPN and security services; email and web hosting services; and enterprise solutions. The firm also provides voice over IP, wireless and voice services on a managed national broadband network, wholesale and carrier services. The company is headquartered in DE. | 4 Jahre |
Statistik
| Land | Beziehungen | % des Gesamten |
|---|---|---|
| Vereinigte Staaten | 63 | 92,65% |
| Vereinigtes Königreich | 3 | 4,41% |
| Cayman Islands | 2 | 2,94% |
Alter der Beziehungen
Aktive
Vergangene
Herr
Frau
Aufsichtsräte
Führungskräfte
Ursprung der Beziehungen
- Börse
- Insiders
- Chris McKee
- Persönliches Netzwerk