API, Application Programming Interface is a set of declarations of the functions that an operating system provides to support requests made by computer programs.
Language-dependent APIs are available only in a particular programming language. They utilize the syntax and elements of the programming language to make the API convenient to use in this particular context.
Language-independent APIs are written in a way that means they can be called from several programming languages. This is a desired feature for a service-style API which is not bound to a particular process or system and is available as a remote procedure call.
Showing posts with label General. Show all posts
Showing posts with label General. Show all posts
Monday, September 1, 2008
Monday, August 25, 2008
OSI Model Layers with Examples
Layer 7: Application e.g HL7, Modbus.
Layer 6: Presentation e.g TDI, ASCII, MIDI, MPEG.
Layer 5: Session e.g NetBIOS, SAP, Half Duplex, Full Duplex, Simplex.
Layer 4: Transport e.g nanoTCP, nanoUDP.
Layer 3: Network e.g Q.931.
Layer 2: Data Link 802.3 (Ethernet), 802.11a/b/g/n MAC/LLC, 802.1Q (VLAN), ATM, FDDI, Fibre Channel, Frame Relay, PPP, Q.921, Token Ring.
Layer 1: Physical e.g RS-232, T1, E1, 10BASE-T, 100BASE-TX, SDH,DSL, 802.11a/b/g/n PHY.
Layer 6: Presentation e.g TDI, ASCII, MIDI, MPEG.
Layer 5: Session e.g NetBIOS, SAP, Half Duplex, Full Duplex, Simplex.
Layer 4: Transport e.g nanoTCP, nanoUDP.
Layer 3: Network e.g Q.931.
Layer 2: Data Link 802.3 (Ethernet), 802.11a/b/g/n MAC/LLC, 802.1Q (VLAN), ATM, FDDI, Fibre Channel, Frame Relay, PPP, Q.921, Token Ring.
Layer 1: Physical e.g RS-232, T1, E1, 10BASE-T, 100BASE-TX, SDH,DSL, 802.11a/b/g/n PHY.
Thursday, August 21, 2008
What is telematics?
A simple definition is that telematics is the term given to the technology that enables remote access to vehicle data over a wireless network.
In short, telematics refers to the integration of wireless communications and computing, sending, receiving and storing information via telecommunication devices.
More specifically, the integrated use of telecommunications and informatics, also known as ICT (Information and Communications Technology).
These devices allow drivers to browse the Internet, send and receive e-mails, receive live traffic updates, listen to satellite radio, and perform various other activities.
More commonly, telematics have been applied specifically to the use of Global Positioning System (GPS) technology integrated with computers and mobile communications technology in automotive navigation systems.
Most narrowly, the term has evolved to refer to the use of such systems within road vehicles, in which case the term vehicle telematics may be used.
In short, telematics refers to the integration of wireless communications and computing, sending, receiving and storing information via telecommunication devices.
More specifically, the integrated use of telecommunications and informatics, also known as ICT (Information and Communications Technology).
These devices allow drivers to browse the Internet, send and receive e-mails, receive live traffic updates, listen to satellite radio, and perform various other activities.
More commonly, telematics have been applied specifically to the use of Global Positioning System (GPS) technology integrated with computers and mobile communications technology in automotive navigation systems.
Most narrowly, the term has evolved to refer to the use of such systems within road vehicles, in which case the term vehicle telematics may be used.
Wednesday, July 30, 2008
What is Hub-and-Spoke model?
The hub-and-spoke is a system of connections arranged like a chariot wheel, in which all traffic moves along spokes connected to the hub at the centre.
The model is commonly used in industry, in particular in transport, telecommunications and freight, as well as in distributed computing.Spokes are simple, and new ones can be created easily.
Because model is centralized, day-to-day operations may be relatively inflexible. Changes at the hub, or even in a single route, could have unexpected consequences throughout the network. It may be difficult or impossible to handle occasional periods of high demand between two spokes.
The model is commonly used in industry, in particular in transport, telecommunications and freight, as well as in distributed computing.Spokes are simple, and new ones can be created easily.
Because model is centralized, day-to-day operations may be relatively inflexible. Changes at the hub, or even in a single route, could have unexpected consequences throughout the network. It may be difficult or impossible to handle occasional periods of high demand between two spokes.
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