What is virtual private network (VPN)

What is a VPN?

A VPN is a virtual private network. The goal is to connect to a server securely using the Internet. The information traveling on the Web will be encrypted.

The primary purpose of VPN is to connect local area networks. It has long been used in the professional world. But it is also possible to use this connection to surf the Web anonymously. That is why this mode of exchange is spreading these days as counter measures.




Difference between SSH and VPN?
Difference between VPN and proxy?

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Tips for taking care of laptop’s battery

The constitution of a laptop’s battery

The battery is the component that stores electrical energy for laptop computers in order to use them without having to plug into an outlet. This item consists of capacitors. Most batteries  used today are lithium-ion battery.

You should know that a battery has a limited life span (2 years). In addition, it will gradually lose its capacity for autonomy. It is therefore important to take care of your laptop’s battery.

WiFi versus Ethernet

Data Transfer
To share data, historically, there are the cables those were used. For computers, the predominant technology is Ethernet. But it went with the big mainframes that can not be moved. Today, we try to make things very smaller and more mobile. For this, it seems obvious that the cables can not run in to the competition. The Wi-Fi wireless technology has arrived. This has many advantages but also has disadvantages.



Ethernet
To use  the Ethernet technology, it needs at least two network cards and Ethernet RJ45 cable.

Difference between LCD and Plasma display

The flat screen monitors


There are two types of flat screens: Plasmas and LCDs. The advantages over old CRTs (CRT=Cathode ray tube) is that they occupy less space,consume less electricity (lower power consumption) and often have better image quality. LCDs and plasmas are two flat screens that is replacing our old CRT (CRT) monitors.


One may wonder which is better? Today is the plasma tends to disappear and the LCD is the right thing.

LCD  versus Plasma

Plasma display screens are made from glass, which reflects more light than the material used to make an LCD screen. It allows a larger viewing angle (the ability to see the image without being in front of it). This offers the best image quality on large screens (diagonal exceeding 1 m).
The LCD works with liquid crystals. It is first significantly less expensive than plasma (which is already convincing). It has a longer life expectancy and has a better resolution. It also tends to run cooler and have greater resistance to display problems.
To conclude, if you want to buy a small flat screen prefer LCD for the economic side. If you want a big television, choose Plasma.

Difference between CD, DVD and Blu-ray disks

Compact Disk (CD)

The CD (Compact Disc) is a disc that can store digital data. It is limited to 700 MB. There are two main types:

• CD-R you burn data, so that ultimately you can not erase the CD.
• CD-RW you can erase the disc and rewrite data on it.

Replacing vinyl, we can distinguish the audio CD used for music industry and the CD-ROM can store any data. This disc can be read on CD players.

Digital Versatile Disc (DVD)

The DVD (Digital Versatile Disc) is another disc that has the same features as the CD but it requires appropriate players and it can hold more data. A normal DVD can hold 4.7 GB, it has the possibility of being double-layered or double-sided rising capacity to 8.5 GB It may also be twice which provides about 17 GB but it is the maximum.
This disc is used to distribute the Movies. Many copy protection systems have been implemented without success because they were always broken by hackers.






The new Blu-ray disk

There is also the new Blu-ray which allows even greater capacity of 50 GB. It can store HD videos (High Definition Videos) that take up space. It is necessary to have readers those are expensive right now.Sony’s PlayStation 3 is compatible with Blu-ray which is normal since the Japanese company is one of the creative format. Some higher models of Laptop computers have Blu ray readers by default.

To summarize

• The CD is mainly used for distributing music.
• The DVD can store more data and therefore used to distribute movies.
• Demanding more HD space, the Blu-ray disc can hold up to 50 GB

Virtual Private Server (VPS)

Virtual Private Server (VPS) Hosting is becoming more popular as it offers the flexibility of a dedicated server but much lower priced compared to a dedicated server.

Dedicated Server Hosting for WordPress Blog : Why and When to think Read more: http://thecustomizewindows.com/category/computer-and-internet/hardware/#ixzz1T3UlNWnY Under Creative Commons License: Attribution Non-Commercial No Derivatives Original source: The Customize Windows

Advantages of Dedicated Server Hosting

• Dedicated Server Hosting  provides greater security by being a direct service from the Hosting Company, Dedicated Server does not share information with other websites (unlike shared or VPS) and therefore more privacy.
• Dedicated Server Hosting provides better use of resources of the server, performance, speed, processor power, bandwidth etc.
• Dedicated Server has less chance of failure and almost 100% uptime.
• You have the full access to the root, thereby you can tweak your WordPress installation to the maximum.