Information Systems Management

Protocols used for Voice over Internet Protocol (VoIP)

Voice over Internet Protocol known as VoIP is a relatively new technology whose transmission is based on Packet Switched Networks. It allows making voice calls over the internet broadband connections instead of the using conventional PSTN landlines. It allows calling on another computer and as well as other telephone numbers and mobiles. It therefore provides all the services like a telephone with the addition of some other facilities due to the internet media.

VoIP services can be seen as the commercial realization of the Network Voice Protocol which came into being in 1973. VoIP services are increasing at an exponential rate due to the low cost calls.… Read the rest

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Abey Francis

Components of Voice Over Internet Protocol (VoIP)

VoIP stands for Voice over Internet Protocol. It is a technology that lets you make telephone calls over the Internet, rather than a regular phone line. Which is almost always cheaper.  VoIP works by using a network technology known as Packet Switching Network whereas landline telephones use the Circuit Switching Network. This is referred to as the Public Switched Telephone Network. The main difference between Packet Switching and Circuit Switching is that Packet Switching uses (data) or Packets and sends them over the Internet while Circuit Switching is accomplished by using electrical circuits to make a telephone connection. Circuit Switching is like the old Switchboard operators, frantically trying to connect the right caller with the receiver.… Read the rest

Abey Francis

Voice Over Internet Protocol (VoIP)

Voice over Internet Protocol or Voice over IP or VoIP is a general term for a family of transmission technologies for delivery of voice communications over internet protocol networks such as the internet or other packet-switched networks. Other terms frequently encountered and synonymous with voice over internet protocol are internet protocol telephony, internet telephony, voice over broadband, broadband telephony, and broadband phone. Internet telephony refers to communications services – voice, facsimile, and/or voice-messaging applications – that are transported via the internet, rather than the public switched telephone network.

Definition of Voice Over Internet Protocol (VoIP)

Voice over internet protocol can be defined as the ability to make telephone calls and to send facsimiles over internet protocol- based data networks with a suitable quality of service and a much superior cost/benefit.… Read the rest

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Scope of Grid Computing

EXPLOITING UNDERUTILIZED RESOURCES

The easiest use of grid computing is to run an existing application on a different machine. The machine on which the application is normally run might be unusually busy due to an unusual peak in activity. The job in question could be run on an idle machine elsewhere on the grid. There are at least two prerequisites for this scenario. First, the application must be executable remotely and without undue overhead. Second, the remote machine must meet any special hardware, software, or resource requirements imposed by the application. In most organizations, there are large amounts of underutilized computing resources.… Read the rest

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Grid Computing: Levels of Deployment

Grid computing is the application of several computers to a single problem at the same time – usually to a scientific or technical problem that requires a great number of computer processing cycles or access to large amounts of data. Computational grids that couple geographically distributed resources are becoming the effective computing platform for solving large-scale problems in science, engineering, and commerce. Grid computing can be divided into three logical levels of deployment: Cluster Grids, Enterprise Grids, and Global Grids.

Cluster Grids

The simplest form of a grid, a Cluster Grid consists of multiple systems interconnected through a network. Cluster Grids may contain distributed workstations and servers, as well as centralized resources in a datacenter environment.… Read the rest

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Introduction to Grid Computing

The popularity of the Internet as well as the availability of powerful computers and high-speed network technologies as low-cost commodity components is changing the way we use computers today. These technology opportunities have led to the possibility of using distributed computers as a single, unified computing resource, leading to what is popularly known as Grid computing.

Grid computing is a term referring to the combination of computer resources from multiple administrative domains to reach a common goal. The grid can be thought of as a distributed system with non-interactive workloads that involve a large number of files. What distinguishes grid computing from conventional high performance computing systems such as cluster computing is that grids tend to be more loosely coupled, heterogeneous, and geographically dispersed.… Read the rest

Abey Francis