IT & Programming Information

OSI Reference Model There are n numbers of users who use computer network and are located over the world. So to ensure, national and worldwide data communication, systems must be developed which are compatible to communicate with each other. ISO has developed this. ISO stands for International organization of Standardization . This is called a model for Open System Interconnection (OSI) and is commonly known as OSI model. The ISO-OSI model is a seven layer architecture. It defines seven layers or levels in a complete communication system. Feature of OSI Model : Big picture of communication over network is understandable through this OSI model. We see how hardware and software work together. We can understand new technologies as they are developed. Troubleshooting is easier by separate networks. Can be used to compare basic functional relationships on different networks. ...

Computer Networks: Introduction, Types & Topology Introduction A network is a collection of computers connected to each other. The network allows computers to communicate with each other and share resources and information. A computer network consists of a collection of computers, printers and other equipment that is connected together so that they can communicate with each other. The Advance Research Projects Agency (ARPA) designed "Advanced Research Projects Agency Network" (ARPANET) for the United States Department of Defense. It was the first computer network in the world in late 1960's and early 1970's. Components of a Network A computer network comprises the following components: ·         A minimum of at least 2 computers ·    Cables that connect the computers to each other, although wireless communication is becoming more common (see Advice Sheet 20 for more information) ·     ...

Spring Modules T h e S p r i n g f r a me w o rk co mp r i s e s o f m a n y m o du les s u ch a s c o re, b e an s, c on t e x t, e x p ression la n g ua g e , A O P, A s pe c ts, In st r u m en t a ti o n , J D BC, O R M , O XM , J M S, T ra n s a cti o n , W eb , S e r v le t , Struts e tc. T he se mo du l e s a re g ro u p e d i n to T e st, C o re C o n t a in e r, A O P , As pe c ts, I n str u me n t a ti o n , Da t a Acc e ss / I n t e g rati o n , W e b ( M VC / R e mo ti n g ) as d ispl a y e d in t h e f o l l o w ing d ia g ra m . Te s t T h is la y e r pro v id e s s u ppo rt o f t e sti n g w ith JU n it a n d T e stN G . S pr i ng C ore C o n t a i ner T h e S p r i n g C o re c on t a in e r co n t a ins c o re, b e a n s, c o n t e x t a n d e x p re s sion l an g ua g e ( E L ) mo d u les.     C o re a nd Be a n s T h e se m o du les p ro v...