What is VSAT in the Computer Network?

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VSAT represents a Very Small Aperture Terminal. It is a two-way satellite ground terminal with a dish wire that is lower than 3 meters. It is generally used to transmit narrowband data (point of sale transactions such as credit card, polling) or broadband information (for the provision of satellite internet access to remote areas, VOIP or video). It is also used for mobile communications.

Features of VSAT

  • Band L has a Bandwidth of 15 MHz where Downlink frequency is 1.5 GHz, and Uplink frequency is 1.6 GHz. For Band S, Bandwidth is 70 MHz where Downlink is 1.9 GHz, and Uplink is 2.2 GHz.
  • Band C having frequency 3 to 7 GHz. The delivered power is low, and the rainfall effect is minimum.
  • Band Ku having frequency for Downlink frequency is 11 GHz, for Uplink frequency is 14 GHz. The delivered power is medium, and the rainfall effect is medium.


There are various advantages of VSAT, which are as follows:

  • Availability − It can deploy VSAT services anywhere.
  • Diversity − It offers an entirely independent wireless link from local infrastructure, a good backup for disaster recovery.
  • Homogeneity − VSAT enables us to give the same speed and strength at all locations.
  • Security − The connection is secure as there is a private layer of the network over the air.
  • Affordable − The pricing is very affordable.
  • Acceleration − Most modern VSAT systems use the onboard acceleration of TCP protocols, HTTP. This delivers high-quality internet performance.


The disadvantages of VSAT are as follows−

  • Latency − VSAT technology uses satellites in geosynchronous orbit. It takes a minimum latency of 500 milli sec. Poor choice for online gaming.
  • Installation − It requires an outdoor antenna. This makes installation a big problem.
Updated on 04-May-2021 13:58:07