The Open Systems Interconnection Model (i.e. OSI Model) is a standard reference model for connecting computers on a network. It divides network protocol design and communications into seven different layers. Each layer in the model is designed to provide services to the layer above it. However perfect the OSI Model seems, it has been questioned and compared with other existing models. Looking into the OSI Model Since each layer in this model serves a purpose for the layer above it, it would be interesting how each layer interacts with the next one in the upper tier. Here are the seven
With the vast growth of modern technology, people of today’s generation definitely are familiar with Database already. However, to those who are not technically inclined, chances are, database might be a foreign word or term to them. A Database normally comes in digital form. Here is where you can place your collection of data for different uses. And these databases are managed using a database manage system, which consists of software that normally comes with a driver called Open Database Connectivity allowing a certain database integrates with the other database. Database Software Database software is like a spreadsheet that uses
Most archived files use the zip format but some use other types. For this reason, knowing the techniques for opening RAR files is necessary. System Requirements File compression / extractor software Computer running Windows or Mac Instructions Download the Software: Unlike zip files, neither Windows nor the Mac have built in applets for extracting this compression format. This means you need to download an application that can open it. This isn’t hard to do. A lot of the utilities that can open zip files can handle RAR too, along with other formats. Go to your favorite download sites and choose
A highly efficient computer network that is very effective in data management, a storage area network (also known as SAN) is widely used architecture in large companies and institutions. This computer system is very reliable and efficient in monitoring the operations and activities of corporations, but some firms do not employ the network because it is expensive. Companies that use this network commonly implement the Small Computer System Interface or SCSI protocol to establish connection between disk drive devices as well as servers. The protocol is very useful in forming any network like Fibre Channel over Ethernet and HyperSCSI. To
How do I set up Skype? One of the most used computer programs for Voice over Internet Protocol features, Skype is a very helpful tool that users can try to call and communicate with their loved ones in other countries free. To set up Skype, the computer that will be used should have all the minimum system requirements because these are important to the efficient functioning of the program. Below are the steps and instructions that you can follow to easily set up Skype. System Requirements for Version 1.2 A computer system that features the operating systems Windows 2000 or
There are actually several ways you can now get or download Unix. The following are some of the places where you can obtain them. Search Engines The best place to start looking would be the search engines. They will point you to the most popular sites where you can get these programs. In addition, they’ll also provide links to other useful sites. There you’ll get more information about the operating system. These engines will return thousands of hits, but you can just stick with the first couple of pages. Because the returns are based on hits and relevance, you can
Free to air satellite receivers, or FTA are becoming more popular and their usage is growing. The following are the basic facts about this device. What the Receivers are The devices are complex, but generally they work the following way. The receivers are designed to take in information and data from the FTA satellites. These transmissions are not encoded. The data is usually in MPEG – 2 format. The receiver is able to get the data by using a video codec compatible with MPEG 2. When the data is relayed, the transmission is usually relayed at UHF or VHF TV
An Internet Protocol, most commonly known as IP, Address is a string of digits that identifies your computer. Imagine it to be much like your driver’s license – it identifies your computer to the internet and provides basic information about your connection and its location. Throughout the web there are sites that allow you to trace IP Addresses and gather more information on them for free. In this post, I am going to review three such services and discuss some potential applications for them. When tracing an IP Address, you can collect some basic data regarding the computer it has
America Online (also known as AOL) is one of the websites that offer free email messaging services to computer users. To prevent the occurrence of security breach, this site allows people to assign a password for their email account. To secure the identity of people who have email accounts at AOL, the website encourages them to change their passwords regularly. How can I change my AOL password? Changing your password at America Online is very easy. The steps are simple and you will not spend much time in assigning a new password for your email account. However, to prevent experiencing
Domain Name System (also known as DNS) is a special naming system that applies for services and resources associated with computers and the Internet. This system is very useful for computer users since it can identify the location and address of computer networks worldwide. DNS was developed to assign domain names as well as to associate these names with IP addresses. It is also the one responsible for assigning authoritative name servers for every computer domain. How do I find my DNS servers? There are different ways of finding these servers. It is important to know that the steps differ