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How USB Ports Work

Universal Serial Ports or USBs have become extremely common and are found on most modern computers. Not only do these allow the users to attach other external devices to the computer, but also the operating systems support it, hence making installations easier. The development of USB came at a time when connecting external devices such as printers and modems required a separate specific parallel port. These were not even fast and required a lot of work during installations. However, with the invention of USB, it gave the users an easy and standardized way to connect up to 127 devices to any computer! Beginning from printers, scanners, mouse, joysticks, flight yokes and digital cameras to webcams, modems, speakers, telephones, video phones, scientific data acquisition devices and network connections – USB has offered a single solution to them all!

The USB Port

For those wondering how to connect a USB device to the computer, it is quite simple, really!

  • Simply find the USB port on the computer and connect the USB connector with it. Typically, you will find a USB socket, rectangular in shape, at the back of your computer.
  • If it is the first time you are connecting a USB device to computer, it will be automatically detected by the operating system and the driver disk will be asked for by the system.
  • However, if you have already installed the USB device, the computer will automatically begin its communication with the device. This connection can then be connected or terminated at any point of time.

These days, the USB devices come with their own built-in cable. Usually the cable has an “A” marked for the connection. If this does not exist, then the device will showcase a socket that is meant for accepting a “B” USB connector. “A” and “B” are described for specific functions – A connects “upstream” i.e. towards computers, and B connect “downstream” towards the individual devices.

How it works!

When the host is turned on, it detects all the devices connected to it through USB and assigns each device with a unique address. This is called the process of enumeration. This process occurs again once the devices are connected to the bus. Then the host seeks information from each device with regards to the kind of data transfer desired– interrupt, bulk or isochronous:

  • Interrupt mode is usually chosen by small devices requiring very little data sending.
  • Bulk mode is used by devices which require bulk data transfer. For example, a Printer.
  • Isochronous mode is chosen by the devices looking for streaming (speakers for example).

The host can also control packets in terms of commands and query parameters.

Once the devices are enumerated, the host keeps track of the total bandwidth requirements of the isochronous and interrupt devices. The maximum they are allowed to consume is 90 percent of the 480 Mbps bandwidth. However, once the limit is reached, the host denies all further access. The rest 10 percent bandwidth is used by the bulk packets and control packets.

LogMeIn Ignition – Beta Version out for Android

After the launch of LogMeIn Ignition for the iPhone, in February of this year, a Beta version of the Ignition has been launched for Android OS. As the name suggests ‘LogMeIn Ignition’ is a remote access application through which you can login to your office computer or your home desktop even when you are away.

With LogMeIn Ignition, you can go mobile without worrying to leave anything behind. With this remote access application, you can carry your office computer or your home desktop with you anywhere in the world! You don’t have to worry about carrying your files on a CD or a Pen drive; with LogMeIn Ignition on your Android you enjoy remote access to your computer. LogMeIn has different versions for variety of Operating Systems.

Beta Version

Recently, the company released its Beta version for Android OS for free. It invited users to download the Beta version from their website, try it and give feedback on the application. This would help the company to optimize and enhance the application based on the user’s feedback before the final launch of the product.

How does it work

The LogMeIn Ignition provides unlimited access to office and home computer on the go and connects you with just a click! It allows you to access any application or folder on the distant computer. With on your Android’s keyboard and screen become you computer’s screen and keyboard. To make this work, one needs to install this application on their mobile, as well as work PC or home desktop. The computer to be accessed should have Microsoft Windows or Mac OS X as an operating system.


Despite all its features, this application has certain limitation. The speakers of your phone do not work as your computer’s phone (as the mouse and the keyboard) with this application. Another limitation that one faces is: while watching videos, the screen is a little slow for the video to be played successfully.

Availability and Pricing

The Beta for Android is currently available for free in United States, Canada, New Zealand, Australia and the United Kingdom. Its price has not been disclosed yet. However, the application for iPhone version is available at $29.99. It is expected that the price for the Android will be a equal to that of the iPhone version.


Overall, LogMeIn is a great application as you do not have to worry about carrying your data with you. Remote access gives you the data that you want, but it is good only when you have a little work to do. If you need to create a presentation for your work, or have to draft a report, working through the Android will be time consuming as compared to working on your Computer or Laptop. Some people would still prefer to carry Laptop for bulk work, but for quick and short work, LogMeIn will be great!


27 years ago Sun had released its own version of the Unix namely SunOS. Nine years later it was renamed Solaris. With its ever expanding user base, Solaris happened to be one of the most popular Unix based OS known for its security, reliability and compatibility. In 2005 Sun took the decision of sharing the source code of Solaris and thus was born OpenSolaris.

The graphic user interface of OpenSolaris is based on the GNOME architecture. This is the same desktop environment used by many Linux distributions and thus Open Solaris is often confused with Linux. OpenSolaris is distributed under the Common Development and Distribution License. OpenSolaris is distributed for free just like Linux but it is quite different. While Linux distributions such as Fedora and Ubuntu are based on the Linux kernel, OpenSolaris has its own Solaris kernel. Nevertheless both are POSIX compliant,the industry standard for Unix like operating systems. OpenSolaris proves itself a worthy competitor to Windows and Linux in many aspects. It offers many features unavailable in Windows or any Linux flavour.

Installing applications on OpenSolaris is just a breeze with its Image Packing System. It is an application manager which scourges for applications online or through LAN and installs them without any hassles. OpenSolaris also boasts of the best file system available in any OS, the ZFS File system. One of the most advanced and most scalable file systems ZFS boosts the performance of OpenSolaris greatly. The file system is 128 bit which means it can support upto 256 quadrillion zeta bytes of storage! Another unique feature of OpenSolaris is the Time Slider. With the help of the superior ZFS file system it takes regular snapshots of files. Thus accidentally deleted files can be easily recovered. Virtual machines are just not enough for OpenSolaris, the all new Crossbow feature enables you to create your own virtual network. Thus multiple network interface cards can be created with their own MAC and IP addresses.

OpenSolaris is simply a god send for developers. It comes with preloaded with a set of developer tools unavailable in other OSs. Writing and debugging programs has never been easier. A unique feature which appeals to developers is DTrace. DTrace is an application which enables one to probe any working program in real time to understand its inner workings. There are about 60,000 probes available and the number keeps growing. This greatly helps a developer in reverse engineering a software code. There is also Service Management Facility which helps in managing services in the background.

OpenSolaris also comes with its own set of fun items. Compiz Visual Effects, which comes preloaded, is useful in creating funky 3D environments. There is also Elisa, an open source media centre tailored for OpenSolaris.

OpenSolaris is a fun and intuitive OS with some of the latest innovation packed under its hood. The reason its open source is not just to distribute it for free but for people to actually contribute to its development. So head to and give it a try.

Call Now: +1 833-522-1003
Call Now: +1 833-522-1003
Call Now: +1 833-522-1003