Josh Elman
Direktor/Vorstandsmitglied bei Tyto Life LLC
Aktive Beziehungen
| Name | Geschlecht | Alter | Unternehmensverbindungen | Zusammenarbeit |
|---|---|---|---|---|
| Ben Rubin | M | - |
Life on Air, Inc.
 Life on Air, Inc. Internet Software/ServicesTechnology Services Life on Air, Inc. operates an online mobile-to-mobile live video platform. It allows users to follow live video streams according to people, places, and venues. The company was founded by Ben Rubin, Roi Tirosh, Uri Haramati, Sima Sistani, and Itai Danino in 2012 and is headquartered in San Francisco, CA. | 12 Jahre |
| Sam Jadallah | M | - |
Tyto Life LLC
 Tyto Life LLC Packaged SoftwareTechnology Services Tyto Life LLC provides sliding patio and front entry doors with integrated locking systems. The company was founded by Sam Jadallah and is headquartered in San Mateo, CA. | - |
| Sima Sistani | F | 44 |
Life on Air, Inc.
Life on Air, Inc. Internet Software/ServicesTechnology Services Life on Air, Inc. operates an online mobile-to-mobile live video platform. It allows users to follow live video streams according to people, places, and venues. The company was founded by Ben Rubin, Roi Tirosh, Uri Haramati, Sima Sistani, and Itai Danino in 2012 and is headquartered in San Francisco, CA. | 12 Jahre |
| Howard Cox | M | 80 |
Greylock Management Corp.
 Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 53 Jahre |
| Christine Kim | F | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 4 Jahre |
| Elisa Schreiber | F | 45 |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 10 Jahre |
| Aneel Bhusri | M | 58 |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 25 Jahre |
| Bob P. Henderson | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 40 Jahre |
| David Sze | M | 58 |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 24 Jahre |
| Bill Helman | M | 65 |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 40 Jahre |
| Otto Chan | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 8 Jahre |
| Allie Dalglish | F | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 6 Jahre |
| Reid Hoffman | M | 56 |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 15 Jahre |
| D. J. Patil | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 13 Jahre |
| Mike Duboe | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 6 Jahre |
| Jason Risch | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 5 Jahre |
| Charlie P. Waite | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 58 Jahre |
| Glen Evans | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 6 Jahre |
| Manuel Bernal | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 8 Jahre |
| Lee Haney | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 6 Jahre |
| Saam Motamedi | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 8 Jahre |
| Holly Rose Faith | F | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 5 Jahre |
| Corinne Marie Riley | F | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 4 Jahre |
| Dan Gregory | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 32 Jahre |
| Henry Mccane | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 55 Jahre |
| Jennifer Haroon | F | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 3 Jahre |
| Jacob Andreou | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 1 Jahre |
| jerry chen | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 11 Jahre |
| Bill Helman | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 24 Jahre |
| Seth Rosenberg | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 7 Jahre |
| Bill Elfers | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 59 Jahre |
| Asheem Chandna | M | 60 |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 21 Jahre |
| Sridhar Ramaswamy | M | 57 |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 6 Jahre |
| Erik D. Lassila | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | - |
| Joseph Ansanelli | M | 54 |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 12 Jahre |
| Don Sullivan | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 24 Jahre |
| James Slavet | M | 54 |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 18 Jahre |
| Eden Shochat | M | - |
Life on Air, Inc.
Life on Air, Inc. Internet Software/ServicesTechnology Services Life on Air, Inc. operates an online mobile-to-mobile live video platform. It allows users to follow live video streams according to people, places, and venues. The company was founded by Ben Rubin, Roi Tirosh, Uri Haramati, Sima Sistani, and Itai Danino in 2012 and is headquartered in San Francisco, CA. | - |
| Jeffrey Weiner | M | 54 |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 16 Jahre |
| David Thacker | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 15 Jahre |
| David Wadhwani | M | 52 |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 5 Jahre |
| Nir Zuk | M | 53 |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | - |
| Josh McFarland | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 7 Jahre |
| John Lilly | M | 53 |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 13 Jahre |
| Simon Rothman | M | 58 |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 13 Jahre |
| Mustafa Suleyman | M | 74 |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 2 Jahre |
| David Strohm | M | 75 |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 44 Jahre |
| David McJannet | M | 52 |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 9 Jahre |
| David Hahn | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 10 Jahre |
| Gerald Chen | M | 49 |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 11 Jahre |
| Sarah Guo | F | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 11 Jahre |
Beziehungs-Chart
Beziehungen zu mehreren Unternehmen
Ehemalige Beziehungen
| Name | Geschlecht | Alter | Unternehmensverbindungen | Zusammenarbeit |
|---|---|---|---|---|
| Ali Rosenthal | F | 47 |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 2 Jahre |
| Michael Dance | M | 67 |
Haas School of Business
| - |
| John Wong | M | - |
Haas School of Business
| 2 Jahre |
| Jessica Lee | F | - |
Haas School of Business
| 4 Jahre |
| Christian Fuentes | M | - |
Haas School of Business
| 2 Jahre |
| Kevin Kwok | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | - |
| Daniel Ayele | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 1 Jahre |
| Ivy Li | F | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 3 Jahre |
| Sunil Chokshi | M | - |
Haas School of Business
| 4 Jahre |
| Brendan Baker | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 4 Jahre |
| Crystal Matthews | F | - |
Haas School of Business
| 4 Jahre |
| Christian Urazan Ramirez | M | - |
Haas School of Business
| 2 Jahre |
| Justin Schuster | M | - |
Haas School of Business
| 2 Jahre |
| Scott Williamson | M | - |
Haas School of Business
| 2 Jahre |
| Sung An | M | - |
Haas School of Business
| 2 Jahre |
| Sarah Clemens | F | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 1 Jahre |
| HoChan Lee | M | - |
Haas School of Business
| 2 Jahre |
| Kevin Lin | M | - |
Haas School of Business
| 1 Jahre |
| Mel Sezto | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 5 Jahre |
| Maya Frai | F | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | - |
| Richard Chan Chan | M | - |
Haas School of Business
| 2 Jahre |
| Selim Giray | M | - |
Haas School of Business
| 2 Jahre |
| Liz Cherson | F | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 2 Jahre |
| Kyle Anderson | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | - |
| Simiso Nzima | M | - |
Haas School of Business
| 2 Jahre |
| Mary A. Francis | F | 59 |
Haas School of Business
| 2 Jahre |
| Abhishek Bhutra | M | - |
Haas School of Business
| 1 Jahre |
| Hong Bo Lu | M | 53 |
Haas School of Business
| 2 Jahre |
| David Su | M | - |
Haas School of Business
| 4 Jahre |
| Sarah Tavel | F | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | - |
| Li Yong Dong | M | 53 |
Haas School of Business
| 2 Jahre |
| Joshua Silverman | M | 55 |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 2 Jahre |
| J. D. Kritser | M | - |
Haas School of Business
| 2 Jahre |
| Ayush Singhania | M | - |
Haas School of Business
| 4 Jahre |
| Judd K. Gilats | M | - |
Haas School of Business
| 2 Jahre |
| Dave Egan | M | - |
Haas School of Business
| 2 Jahre |
| Casey Winters | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 1 Jahre |
| Wade Chambers | M | 56 |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | - |
| Ravi Anaparti | M | - |
Haas School of Business
| 2 Jahre |
| D. Stuart Bowers | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 1 Jahre |
| Matthew Ricardo Segura | M | - |
Haas School of Business
| 4 Jahre |
| Hitoshi Koide | M | 55 |
Haas School of Business
| 2 Jahre |
| Jim E. Quinn | M | - |
Haas School of Business
| 1 Jahre |
| Ongki Kurniawan | M | 52 |
Haas School of Business
| 2 Jahre |
| Matthew Heiman | M | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | - |
| Juliana Garaizar | F | - |
Haas School of Business
| - |
| Talia Sessler | F | 49 |
Haas School of Business
| 2 Jahre |
| Stephanie Hannon | F | - |
Greylock Management Corp.
Greylock Management Corp. Investment ManagersFinance Greylock Management Corp (Greylock Partners) is a venture capital firm founded in 1965 by Charlie P. Waite and Daniel S. Gregory. The firm is headquartered in Menlo Park, California. | 1 Jahre |
| Rafa Alenda | M | - |
Haas School of Business
| 2 Jahre |
Statistik
| Land | Beziehungen | % des Gesamten |
|---|---|---|
| Vereinigte Staaten | 100 | 100,00% |
Alter der Beziehungen
Aktive
Vergangene
Herr
Frau
Aufsichtsräte
Führungskräfte
Ursprung der Beziehungen
- Börse
- Insiders
- Josh Elman
- Persönliches Netzwerk