A virtual private network (VPN) is a computer based network in which the links between nodes are carried by open connections, SSL connections or virtual circuits in some larger network instead of by physical wires. The link-layer connections of the virtual network are said to be tunneled through the larger network when this is the case.

One common application is secure communications through the public Internet, but a VPN need not have explicit security features, such as authentication or content encryption. VPNs, for example, can be used to separate the traffic of different user communities over an underlying network with strong security features.A typical VPN works by using the shared public infrastructure while maintaining privacy through security procedures and tunneling protocols such as the Layer Two Tunneling Protocol (L2TP).

continue reading "Have you ever used a VPN(Virtual Private Network)?"

Computer Viruses and Malicious Code

These days with the proliferation of computers and computer technology it is inevitable that when things go wrong they do so on a larger scale. People can sit at home and write programs that insidiously invade computer systems both public and private. The consequences of these attacks can range from benign to extremely severe and the consequences can be extreme depending upon the system attacked

The computer simply executes instructions given to it. As such it is an extremely useful tool for the criminally inclined. When passwords and security mechanisms that are put in place to protect a system are breached, access is gained and a host system can be altered, its contents modified or infected with a latent virus or malicious code that will execute at a later date. This means that a system can be compromised, and although seeming to run smoothly will cause havoc when least suspected.
continue reading "Computer Viruses and What You Should Know"

A computer network setup is an integral part of every organization today. The linkage of the different computers in the office space helps in the growth of the business by saving time and money. It speeds up the work pace and invariably saves a lot of time. Each office would have its own specific needs. One can approach network consulting firms with their requirements and have a computer network setup that caters specifically to their needs. Your computer must be used to its full potential and all your needs should be met with a good computer network system in place.
continue reading "Setting Up a Small Business Computer Network"

Introduction

In these recent years, with 3G and 3.5G being accepted as a common and popular mobile network, HSPA (High-Speed Packet Access) becomes very crucial for road warriors, as they are much faster than GPRS network and easy to use.

A person will need a 3G or 3.5G-enabled devices to use this high-speed network (of course, this service is dependent on the Telecommunication Company of the country). It can be in-built in the devices already or it can be in an external unit.

This review is based on HuaWei’s USB Modem E170. HuaWei Technologies Co., Ltd has been aggressively promoting their USB Modems.

Main Content

HuaWei’s latest USB stick modem is much smaller than its predecessor (E220). Technically, this USB stick modem is actually a modem, an USB flash, a virtual CD-ROM drive.

In this review, I will be using the modem from Singapore Telecommunication operator, Starhub.
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