Geotagging

Geotagging refers to tagging of photos, videos, RSS feeds, or any other media with a location. That is, adding of metadata related to geographical identification.The growing use of GPRS-enabled multimedia and smart phones has made geotagging very popular nowadays. This can not only help people find images and information based on a location, but it can also be used to create location-based news and media feeds by combining an application like Google Maps with geotagged blogs, news articles and flickr photos.

DVR

A digital video recorder (DVR) or a personal video recorder (PVR) is a device that records video in a digital format to a disk drive, USB keydrive, sd memory card or other memory medium within a device. Some of the popular companies which offer DVR technology are TiVo, Humax, Dish Network, Hughes, Motorola, Phillips.DVR technologies are becoming very popular with the masses because they offer users the choice to pause and rewind live tv, to be watched at a suitable time. It also allows users to record a program while another one is being watched.DVR includes stand-alone set-top boxes, portable media players (PMP) and recorders (as camcorders that record in memory card) and software for personal computers which enables video capture and playback to and from disk. Some consumer electronic manufacturers have started to offer televisions with DVR hardware and software built in to the television itself; LG was first to launch one in 2007.

IPTV

IPTV stands for Internet Protocol Television. It is a service where digital cable network is delivered over internet networks rather than on cable or satellite Television.IPTV was first used as a service to broadcast ABC's World News Now in 1994. IPTV should not be confused with Internet TV, which is just the broadcasting of television over the internet.With IPTV, you can stream TV on your computer using your regular broadband connection and a video player (which your IPTV provider has signed up with). Currently, BSNL, MTNL, Reliance and AirTel offer IPTV in India.

RSS Feed

The orange square with 2 curvy lines and a dot that you see on almost every other Website these days is called an RSS feed. Its most commonly expanded form is “Really Simple Syndication”.The RSS feed basically provides access to all newly published content -- whether audio, video or text in a standardized format. Usually, one subscribes to RSS feeds of newspapers, blogs, news websites and your bookmarked items.If you want to keep track of many things at the same time but cannot visit each website of your interest individually, subscribe to RSS to get updates as they happen.

Serial Port

In computer networking, a serial port enables external modems to connect to a PC or network router via a serial cable. The term "serial" signifies that data sent in one direction always travels over a single wire within the cable.

The prevailing standard for traditional serial port communications historically has been RS-232. These serial ports and cables are the same used for PC keyboards and other computer peripheral devices (see sidebar). Serial ports and cables for RS-232 PCs generally feature 9-pin DE-9 connectors, although 25-pin DB-25 and other variations exist on specialized hardware. The alternative RS-422 standard applies on many Macintosh computers.

Understand Cloud Computing

Let's say you're an executive at a large corporation. Your particular responsibilities include making sure that all of your employees have the right hardware and software they need to do their jobs. Buying computers for everyone isn't enough -- you also have to purchase software or software licenses to give employees the tools they require. Whenever you have a new hire, you have to buy more software or make sure your current software license allows another user. It's so stressful that you find it difficult to go to sleep on your huge pile of money every night.

Soon, there may be an alternative for executives like you. Instead of installing a suite of software for each computer, you'd only have to load one application. That application would allow workers to log into a Web-based service which hosts all the programs the user would need for his or her job. Remote machines owned by another company would run everything from e-mail to word processing to complex data analysis programs. It's called cloud computing, and it could change the entire computer industry.

In a cloud computing system, there's a significant workload shift. Local computers no longer have to do all the heavy lifting when it comes to running applications. The network of computers that make up the cloud handles them instead. Hardware and software demands on the user's side decrease. The only thing the user's computer needs to be able to run is the cloud computing system's interface software, which can be as simple as a Web browser, and the cloud's network takes care of the rest.

Spoofing

The word "spoof" means to hoax, trick, or deceive. Therefore, in the IT world, spoofing refers tricking or deceiving computer systems or other computer users. This is typically done by hiding one's identity or faking the identity of another user on the Internet.Spoofing can take place on the Internet in several different ways. One common method is through e-mail. E-mail spoofing involves sending messages from a bogus e-mail address or faking the e-mail address of another user. Fortunately, most e-mail servers have security features that prevent unauthorized users from sending messages.However, spammers often send spam messages from their own SMTP, which allows them to use fake e-mail addresses. Therefore, it is possible to receive e-mail from an address that is not the actual address of the person sending the message.

Trunk Circuit

The term trunk circuit have different meanings when they used in different conditions.Here I am going to tell you what this term has its importance in Telephone companies.Telephone companies use this term to refer to large-capacity circuits that form the main interconnect of the telephone network (e.g between cities).Cable television companies use the term refer to the high capacity co-axial cables and used to connect the cable company and neighborhood concentration points,a trunk circuit can be up to 15 miles long.

Dynamic Server Creation

Most concurrent servers operate dynamically.The server creates a new thread for each request that arrives.In fact,the server program is constructed in two parts:one that accepts the request and creates a new thread for the request,and another that consists of the code to handle an individual request.When a concurrent server starts executing,only the first part runs.That is,the main server thread waits for a request to arrive.When a request arrives,the main thread creates a new service thread to handle the request.The service thread handles one request and then terminates.Meanwhile,the main thread keeps alive- after creating a thread to handle a request,the main thread waits for another request to arrive.

For ex:If N clients are using a given service on a single computer,there are N+1 threads providing the service that means the main thread is waiting for additional requests,and N service threads are interacting with a single client.