Very Small Aperture Terminal (VSAT) Communication Networks

In the design, the topology used is a star topology. The computers in every office or classroom are linked to the central device known as the switch. The star topology leads to the expansion of the network without any disruption. This defines the use of a hub, a router or a switch to interconnect various computers together. All the workstations in this topology are connected with a connection of point-to-point to the central device. The data is first passed through the primary device before reaching the planned destination. Hub controls and manages the whole network. The hubs connect several nodes that are present in the star system. The hub acts as the signal booster (Elhakeem, 2010).

A Star topology is the second type of topology represented. This topology is easy to install as well as being easy to expand by connecting additional nodes or devices. Faults are easily detected and parts are easy to remove. In a Start topology, when devices need to be added or removed, it does not cause disruptions to the network. This type of topology is used for many different applications, ranging from small to large networks. (FCIT, Univ. of Florida)

This example focuses on the use of satellite networking, to broadcast the signal from the satellite, to the ground station. This type of technology involves the use of Zigbee at small distances, and WiMax for greater distances.

Star – All computers and devices are connected to a centrally situated hub or switch. The hub or switch collects and distributes the flow of knowledge at intervals the network. It’s higher to use a switch than a hub as a result of a switch transmits the info to the supposed recipient instead of to all or any hosts on a network.

The effect of this is intended to reduce the amount of traffic which is as a result of information coming in data sets from different virtual LANs. The VLANs also use different links and, therefore, make the bulk of the information more may need to acquire more spanning tree protocols to break up the data into manageable sizes. There are two available versions according to Cisco that can be used to create the separate spanning tree protocols for the different routes taken by the multiple networks. The first is the per-VLAN spanning tree and the second is the per-VLAN spanning-tree plus. These groups of spanning tree create individual spanning trees for each of the VLANs so as to better manage the data presented to them. Both of these versions are propriety protocols and contrary to what we have learnt about compatibility with equipment from other vendors, the PVST and the PVST+ have switches that are supported by other suppliers in the industry as described by Waldemar

The current network is a fairly early design called an Ethernet Bus network. A bus network Topology is an architecture in which a set of clients are connected via a shared communications line, called a bus. Each of the 3 sites utilizes the same configuration of

The selection of satellites bands with wider frequencies allows a variety of information to travel and decreases the limitation of usage by the users. The Ka-Band (26-40GHz) the communication satellites provides high resolution, close ranges targeting radar on military crafts(TIA,2013). The current suggestion of band would be the Ka-Band (26-40GHz) the communication satellites allows high resolution, close ranges that support strong military functions(TIA,2013). advancements to the developing concept, identify leverage over the other choices, utilizing Ka-bands do propose substantiated risks however, it is still operable (Lewis, 2014). Users offering themselves a band with wider frequency means information can transfer swiftly whereas, a smaller frequency could offer more accuracy but limits the user capability. All forums offer positive attribute and consequential attributes but overall the assessment has to be made by the operation leader. As technology develops engineers are developing ideal that are properly modified to support the needs of the community and excel in

NASA Space Network has been providing a global communication service from early 1980’ [1]. The main function of the space network is providing tracking and data transfer service between user platform and the mission operation center . The Space network consists of two segments, which are the space segment and the ground segment [3].

The main topologies are Bus (All Workstations are connected to one line), Star (All Workstations are connected to a central hub), Ring (All workstations are connected to fellow workstations left and right of them) and Mesh (All workstations are connected to each other). A lot of topologies are designed to allow more workstations to be added at a later date. But a lot of topologies also have weaknesses, such as the Bus topology and the Ring topology, which would both break down if a node was to fail.

A VLAN or virtual local area network connects departments, which are not connected physically. VLANs will be implemented while using the Trunking VLAN Protocol. To ensure that all departments are grouped together, they will use network assigned VLANs. The VLAN information is stored on the VTP server so that it is centrally located for easy maintenance. By grouping the departments together, the sales departments will all be connected with each other along with the administrative departments connected with each other. This gives the administrator an easier way to manage the data flow and increase security when needed. The network will also implement the Spanning Tree Protocol

Satellite communication is undoubtedly ingrained into many facets of our global society. It provides an ability to relay voice communications of family members across the globe or transmit data from field locations to headquarters located across oceans. It has fundamentally changed how we communicate and share data with each other over long distances.

Space and its’ operational capabilities are covered by Joint Publication (JP) 3-14. The formation of a Multinational Joint Task Force (MNJTF) headquarters is enhanced through SATCOM or satellite communication and Positioning Navigation and Timing (PNT). SATCOM allows the MNJTF to communicate with the HQ and partner units executing operations in the Joint Operational Area; PNT provides real-time visibility of forces maneuvering within the JOA enabling battle tracking from remote locations. Forces operating within the straight of Mallaca will receive information, surveillance, and reconnaissance (ISR) as well as gather information regarding the operational environment such as the terrain and weather before entering their assigned Areas of Operation.

Global Communications can use satellite technology and strategic partnership to regain market share and become a global leader in telecommunications.

The Joint Tactical Radio Systems can be described as inexpensive radio systems that are software programmable and offer reliable, secure, data, multi-channel voice, and video communications for mobile users in the military. The tactical radio systems provide an all-inclusive, safe, and multi-channel mobile communications network ability for ground vehicles. The deliver communications networking capabilities that enable the transfer of several megabits of data per second on moving ground vehicles at the tactical edge. Consequently, the systems places total power and control of the Global Information Grid into the warfighters and take the situational awareness of network beyond the center for tactical operations (Simonsen, 2011).

A mobile phone works on a unique networked system which needs no wiring, no fixation and no botheration. Originally it was used in cars, airlines, and passenger trains but increasingly it is becoming ubiquitous. It is basically low- power radio telephone. In this magical system calls go through radio transmitters that are located within small geographical unit which are known as cells. Since each cell's signals are too weak to interfere with those of other cells operating on the same frequencies and more channels can be used than would be possible with high power radio frequency transmission. Narrow-band frequency modulation (FM) is the most common mode of transmission, each message is assigned a carrier, unique to the cell from which it is transmitted.