VSAT, which stands for Very Small Aperture Terminal, is a type of satellite technology. As the name suggests, it consists of a two-way satellite structure set up on level ground. VSAT makes use of a dish antenna. This dish antenna is not larger than 3 meters. Most dish antennas used by the VSAT technology have sizes ranging from 75 centimeters to around 1.5 meters.

VSAT is applied in several technologies. Certain systems providing point of sale services for credit cards use VSAT to initiate and complete the transactions. Remote satellite Internet access and Voice Over Internet Protocol (VoIP), as well as devices used in mobile maritime operations also use VSAT technology.

VSAT uses a set of advanced technologies to provide data transfer and other functions. It uses satellite broadcasting technologies including high-powered components and antennas. These antennas have a much higher precision than those used by satellite television systems. VSAT also uses a receiver and a transmitter to send data back to the main satellite.

Furthermore, VSAT can be configured in a number of network topologies, for example, a star topology with a central site. This central site transports data to and from each terminal using the satellite. Aside from this, a mesh topology can be used in VSAT. Instead of using a central site, each terminal in a mesh topology acts as a hub and relays data through a satellite. Additionally, a combination of star and mesh topology can also be used in VSAT. In this setup, the stars and their central sites are connected to each other through a mesh topology.