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What is Dot Matrix Printer? Type of computer printer that uses tiny hammers in its print head to strike pins over an inked ribbon to form characters or images on paper, and is used mainly for multi-part forms. For general printing, dot matrix printers have largely been replaced by cheaper and faster non-impact printers such as ink jets and lasers which also produce output of far better quality (resolution). Long after the arrival of laser printers, dot matrix printers have been used to print continuous multi-part forms and mailing labels. The tractor feed contains a sprocket that grabs the perforated holes at both sides of the form and pulls it through uniformly. Dot matrix printers print columns of dots in a serial fashion. The more dot hammers (pins), the better looking the printed results. The print head can get very hot. Unlike laser and inkjet printers, which can create characters of any size, dot matrix printers have limited options. Hammers Hit the Ribbon ...

What is laser printing? IBM introduced the first laser printer in 1975 for use with its mainframe computers. In 1984, Hewlett-Packard revolutionized laser-printing technology with its first Laser Jet, a compact, fast, and reliable printer that personal computer users could afford. Since then, laser printers have decreased further in price and increased in quality. Hewlett Packard continues to be the leading manufacturer with competitors including Lexmark, canon, and Xerox. The laser printer is different from an inkjet printer in a number of ways. The toner or ink in a laser printer is dry. In an inkjet, it is wet. Over time, an inkjet printer is about ten times more expensive to operate than a laser printer because ink needs replenishing more frequently. The printed paper from an inkjet printer will smear if wet, but a laser-printed document will not Both types of printer operate quietly and allow fonts to be added by using font cartridges or installing soft fonts. If your printing ...

HDD vs SSD Most people now buy laptops for their computing needs and have to make the decision between getting either a Solid State Drive (SSD) or Hard Disk Drive (HDD) as the storage component.  So which of the two is the better choice, an SSD or HDD? Each buyer has different needs and you have to evaluate the decision based on those needs, your preferences, and of course budget. Even though the price of SSD has been falling, the price per gigabyte advantage is still strongly with HDD. Yet, if performance and fast boot-up is your primary consideration and money is secondary, then SSD is the way to go. For the remainder of this article. What is an HDD? Hard Disk Drives have been around for donkey's years relative to the technology world. HDDs were first introduced by IBM in 1956 - yes folks this is nearly 60-year old technology, thank goodness vacuum tubes for TVs didn’t last so long An HDD uses magnetism to store data on a rotating platter. A read/write head floats ...

What is DHCP protocol? Introduction DHCP (Dynamic Host Configuration Protocol) is a core infrastructure service on any network that provides IP addressing and DNS server information to PC clients and any other device. DHCP is used so that you do not have to statically assign IP addresses to every device on your network DHCP is being expanded to fit into new network services like the Windows Health Service and Network Access Protection (NAP). However, before you can use it for more advanced services, you need to first install it. Your ISP has a DHCP server. They can assign IPs by modem MAC addresses. When your modem comes online, it communicates to the network indicating it is looking for an IP address. The DHCP server listens to this communication and starts talking to the modem. The modem then transmits its MAC address to the DHCP server. At that point, either an IP has been reserved for the modem or one is assigned at that time. Hence cloning your MAC address to get a ne...

What is Active Directory? Active Directory (AD) is a Microsoft technology used to manage computers and other devices on a network. It is a primary feature of Windows Server, an operating system that runs both local and Internet-based servers. Active Directory allows network administrators to create and manage domains, users, and objects within a network. For example, admin can create a group of users and give them specific access privileges to certain directories on the server. As a network grows, Active Directory provides a way to organize a large number of users into logical groups and subgroups, while providing access control at each level. The Active Directory structure includes three main tiers: 1) domains, 2) trees, and 3) forests. Several objects (users or devices) that all use the same database may be grouped in to a single domain. Multiple domains can be combined into a single group called a tree. Multiple trees may be grouped into a collection called a forest. Each ...

Difference between bandwidth and latency Difference between bandwidth and latency is something that confuses a lot of people, but if you are an IT person it would be useful to know the difference between the two because sooner or later you will face a network problem related to it. Part of the confusion has been created by Internet providers by always recommending increase of bandwidth to Internet speed related problem, but as we will see, an Internet connection speed is not always dictated by bandwidth. This part is very important. What is difference between bandwidth and latency? I will give you an analogy to make it easier to understand it if you are still confused. Imagine a highway with 4 lanes where the speed limit is 70 mph. Now on the Internet, bandwidth is the highway, and latency is the 70 mph speed limit. Now if you want to increase the amount of cars that travels through the highway you can add more lanes, but because the highway has too many curves, and ...

How to improve your computer speed Whether you use your computer for work, you want to run your application fast. Generally, that means that you want your computer to be fast and free. Here are some easy ways to perform a computer cleanup that can quickly improve its performance and speed up a slow PC. Defragment your hard disk Fragmentation makes your hard disk do extra work that can slow down your computer. Disk Defragmenter rearranges fragmented data so your hard disk can work more efficiently. Disk Defragmenter runs on a schedule, but you can also defragment your hard disk manually. This is a first step for PC performance upgrade. Clean up hard disk Unnecessary files on your hard disk take up disk space and can slow down your computer. Disk Cleanup removes temporary files, empties the Recycle Bin, and removes a variety of system files and other items that you no longer need. Turn off visual effects If Windows is running slowly, you can speed it up by disabl...

Fingerprint sensor in mobile screen In fact, the fingerprint sensor made by sensor company Synaptics lives beneath the 6-inch OLED display. That's the "screen" you're actually looking at beneath the cover glass. You can see it in our photos here.  Fingerprint sensor in mobile screen When your fingertip hits the target, the sensor array turns on the display to light your finger, and only your finger. The image of your print makes its way to an optical image sensor beneath the display. It's then run through an AI processor that's trained to recognize 300 different characteristics of your digit, like how close the ridges of your fingers are. It's a different kind of technology than what most readers use in today's phones.   Synaptics, which demoed the Vivo phone in a crowded booth at the back of an interminable hallway, says that the fingerprint reader won't suck up much more battery by illuminating your finger, promising that its pow...

How to enable .net framework in windows 10 .Net Framework is an important feature for running many windows applications, but some engineers & user calling for feature is not enable on the windows 10 and they have some problems for installing .NET.NET Framework is a developed by Microsoft that runs primarily on windows. The .net is very important parts for many application running on windows platforms. .NET provided for application running normally.  Before installing these application we need to be enable .NET framework on your computer. .NET Framework you need to have an active Internet connection, but you can also install this framework using the offline installer. .Net Framework errors 0x800f081f, 0x800f0922, 0x800f0906 sometimes you not able to install .NET because various errors. In some cases you might not be able to install, NET Framework at all. This is most likely caused by your settings or corrupted files, but you can easily fix that. .NET Framework (...