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Measures or practices to protect computer systems against virus attacks
by Louie Y K Wong (Posted: 7/5/2010 11:30 AM)

With an estimated 40,000 viruses already identified and some 300 new viruses created each month, keeping a computer free of viruses is a daunting but not impossible task. The following are steps every computer user should follow to protect his or her computer from viruses.

  1. Install an anti-virus software program to identify and remove viruses before they can cause any damage. These programs scan, or review, files that may come from floppy diskettes, the Internet, email attachments, or networks, looking for patterns of code that match patterns in the anti-virus software vendor's database of known viruses. Once detected, the software isolates and removes the virus before it ...
 
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What are the differences between a virus and a worm?
by Louie Y K Wong (Posted: 7/5/2010 11:29 AM)

A computer virus is a small program written to alter the way a computer operates, without the permission or knowledge of the user. A computer virus must meet two criteria:

  1. It must execute itself. It often places its own code in the path of execution of another program.
  2. It must replicate itself. For example, it may replace other executable files with a copy of the virus infected file. Viruses can infect desktop computers and network servers alike.

Most viruses are purposely programmed to damage the computer by destroying programs, deleting files, or reformatting the entire hard disk. Others are not designed to do any damage, but simply to replicat ...

 
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Domain Name Registry
by Louie Y K Wong (Posted: 31/7/2009 03:51 PM)

A domain name registry, is a database of all domain names registered in a top-level domain. A registry operator, also called a Network Information Center (NIC), is the part of the Domain Name System (DNS) of the Internet that keeps the database of domain names, and generates the zone files which convert domain names to IP addresses. Each NIC is an organisation that manages the registration of Domain names within the top-level domains for which it is responsible, controls the policies of domain name allocation, and technically operates its top-level dom ...

 
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MySQL Error (1250) : Client does not support authentication protocol
by Louie Y K Wong (Posted: 30/7/2009 07:46 PM)

Since MySQL had evolved into a common tool being used by the majority groups of web application developer as an open source database and version 4.1.x or above released, a kind of hashing basis algorithm for authentication protocol which is no longer supports the client-side of old version MySQL. While the client-side makes a request of password authentication from MySQL server-side, due to the algorithm of both sides are not identical, the following error consequently occurs:

Error (1250) : Client does not support authentication protocol requested by server; consider upgrading MySQL client

If upgr ...

 
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什么是RSS?
by Louie Y K Wong (Posted: 30/7/2009 10:14 AM)

RSS的优点

RSS的英文全称是Really Simple Syndication,是一种透过XML(eXtensible Markup Language)特性所制定的格式,让网站的管理者可以把网页内容传给订阅户。这是个有点像电子报和新闻群组(Newsgroup)的东西,但是赋予读者更大的自订能力和更丰富的资料。

将RSS技术应用在获取来源端的即时讯息是一个很重要的演进,对於使用者也可以很清楚的知道这些新闻是从何而来,以及这些资讯是否对自己是有用的。以下是RSS发展的优点:

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What is RSS?
by Louie Y K Wong (Posted: 30/7/2009 10:12 AM)

What is RSS?

RSS (Really Simple Syndication)  is a popular technology employed by websites and weblogs to push headlines and summaries of content directly to users. Also known as web feeds, it saves the user from having to make daily trips to numerous websites for fresh content that is of interest to him.

What tools do I need?

To start getting RSS feeds, you can either install a dedicated

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WCMS or Web CMS
by Louie Y K Wong (Posted: 29/7/2009 05:18 PM)

A web-content-management system (WCMS or Web CMS) is content management system (CMS) software, usually implemented as a Web application, for creating and managing HTML content. It is used to manage and control a large, dynamic collection of Web material (HTML documents and their associated images). A Web CMS facilitates content creation, content control, editing, and many essential Web maintenance functions.

Usually the software provides authoring (and other) tools designed to allow users with little or no knowledge of programming languages or markup languages to creat ...

 
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Third-level Domain
by Louie Y K Wong (Posted: 29/7/2009 05:16 PM)

A third-level domain is the next highest level in the domain name hierarchy below the second level domain and the segment that appears directly to the left of the second level domain.

Domain names are names that uniquely identifies a site (e.g., a web site or ftp site) on the Internet or other TCP/IP (transmission control protocol/Internet protocol) networks and serve as user-friendly substitutes for difficult-to-remember, numeric IP addresses.

A second-level domain is the portion of a domain name directly below the top level domain (TLD) in the domain name system (DNS) hierarchy and the portion that appears immediately to the left of the TLD. The TLD is the last part of ...

 
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Why it's important to renew your domain name?
by Louie Y K Wong (Posted: 29/7/2009 05:14 PM)

If you don't renew your expired domain name, it will lapse and become available for anyone else to register.

If you lost your domain name, what would happen?

  • You would need to change your domain name which would have an impact on your brand and where customers can find your information online.
  • If you sell goods online then customers wouldn't be able to find your shop.
  • You would need to change your domain name and completely rebuild your search engine ranking which would undoubtedly mean losing customers and revenue.
  • You would need to change all of your email addresses.
  • You could lose orders and enquiries sent by email.
 
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