Sunday, April 3, 2011

Web Hosting tutorial

4: Web Hosting Capacities


Make sure you get the disk space and the traffic volume you need.

How Much Disk Space?

A small or medium web site will need between 10 and 100MB of disk space.
If you look at the size of HTML pages, you will see that the average size is very small. But if you look at the size of the images used inside these pages, you will often find the images larger than the page.
Expect each HTML page to take up between 5 and 50KB of disk space on your web server, depending on the use of images or other space-consuming elements.
If you use a lot of images or graphic elements (or sound files or movies), you might need much more disk space.
Make sure you know your needs, before choosing a web host.

Monthly Traffic

A small or medium web site will consume between 1GB and 5GB of data transfer per month.
Calculate the following: average page size * expected page views per month
Example: If your average page size is 30KB and you expect 50,000 page views per month, you will need 0.03MB * 50,000 = 1.5GB.
Larger, commercial sites often consume more than 100GB of monthly traffic.
Before you sign up with a host provider, make sure to check this:
  • What are the restrictions on monthly transfer?
  • Will the web site be closed if it exceeds the volume?
  • Will you be billed a fortune if the web site exceeds the volume?
  • Is upgrading a simple task?

Connection Speed

In the early days of the Internet a T1 connection was considered a fast connection. Today connection speeds are much faster.
1 byte equals to 8 bits (and that's the number of bits used to transport one character). Low-speed modems can transport from about 14 000 to 56 000 bits per second (14 to 56 kilobits per second). That is somewhere between 2000 and 7000 characters per second, or about 1 to 5 pages of written text.
One kilobit (Kb) is 1024 bits. One megabit (Mb) is 1024 kilobits. One gigabit (Gb) is 1024 megabits.
These are connection speeds used on the Internet today:

Name                             Connections                               Speed per second
Modem                           Analog                                        14.4-56 KB
DO                                 Digital (ISDN)                             64 KB
T1                                   Digital                                         1.55 MB
T3                                   Digital                                         43 MB
OC-1                              Optical Carrier                            52 MB
OC-3                              Optical Carrier                            156 MB
OC-12                            Optical Carrier                            622 MB
OC-24                            Optical Carrier                            1.244 GB
OC-48                            Optical Carrier                            2.488 GB


Before you sign up with a host provider, surf some other web sites on their servers, and try to get a good feeling about their network speed. Also compare the other sites against yours, to see if it looks like you have the same needs. Contacting some of the other customers is also a valuable option


5 : Web Hosting Email Services

Hosting services should include e-mail accounts and e-mail services.

E-mail Accounts

Hosting solutions should include e-mail accounts for each person in your company.
E-mail addresses should appear something like this:
john@mycompany.com
john.doe@mycompany.com
jdoe@mycompany.com

POP E-mail

POP stands for Post Office Protocol. POP is a standard client/server protocol for sending and receiving e-mail.
The e-mails are received and held on your internet server until you pick it up with a client e-mail program, like Microsoft Outlook or Mozilla Thunderbird.

IMAP Email

IMAP stands for Internet Message Access Protocol. IMAP is another standard protocol for sending and receiving e-mail.
The e-mails are received, and held on your internet server, until you pick it up with a client e-mail program, like Microsoft Outlook or Mozilla Thunderbird.
IMAP represents an improvement over POP because e-mail stored on an IMAP server can be manipulated from several computers (a computer at home, a workstation at the office, etc.), without having to transfer messages back and forth between computers. POP was designed to support e-mail access on one single computer.

Web-based E-mail

Web-based e-mail services enable you to access your e-mail via a web browser. You log into your e-mail account via the Web to send and retrieve e-mail. Being able to access your e-mail from any browser anywhere in the world is a very attractive option.
Examples of web-based e-mail services are Gmail and Hotmail.

E-mail Forwarding

E-mail forwarding allows you to have multiple e-mail personalities.
With e-mail forwarding, you can setup aliases for other e-mail accounts like:
postmaster@mywebsitename.com should be forwarded to peter@mywebsitename.com
sales@mywebsitename.com should be forwarded to mary@mywebsitename.com

Mailing Lists

Some service providers offer mailing list capabilities. This is valuable if you plan to send out e-mails to a large number of users.


6 : Web Hosting Technologies

This section describes some of the most common hosting technologies.

Windows Hosting

Windows hosting means hosting of web services that runs on the Windows operating system.
You should choose Windows hosting if you plan to use ASP (Active Server Pages) as server scripting, or if you plan to use a database like Microsoft Access or Microsoft SQL Server. Windows hosting is also the best choice if you plan to develop your web site using Microsoft Front Page.

Unix Hosting

Unix hosting means hosting of web services that runs on the Unix operating system.
Unix was the first (original) web server operating system, and it is known for being reliable and stable. Often less expensive than Windows.

Linux Hosting

Linux hosting means hosting of web services that runs on the Linux operating system.

CGI

CGI scripts are executables that will execute on the server to produce dynamic and interactive web pages.
Most ISPs offer some kind of CGI capabilities. ISPs often offer preinstalled, ready to run, guest-books, page-counters, and chat-forums solutions in CGI.
CGI is most common on Unix or Linux servers.

ASP - Active Server Pages

ASP is a server-side scripting technology developed by Microsoft.
With ASP you can create dynamic web pages by putting script code inside your HTML pages. The code is executed by the web server before the page is returned to the browser. Both VBScript and JavaScript can be used.
ASP is a standard component in Windows 95,98, 2000, and XP. It can be activated on all computers running Windows.


PHP

PHP is the widely-used, free, and efficient alternative to competitors such as Microsoft's ASP.
PHP is perfectly suited for Web development, and can be embedded directly into the HTML code.
The PHP syntax is very similar to Perl and C.
PHP is often used together with Apache (web server) on various operating systems. It also supports ISAPI and can be used with Microsoft's IIS on Windows.
PHP supports many databases, such as MySQL, Informix, Oracle, Sybase, Solid, PostgreSQL, Generic ODBC, etc.


JSP

JSP is a server-side technology much like ASP, developed by Sun.
With JSP you can create dynamic web pages by putting Java code inside your HTML pages. The code is executed by the web server before the page is returned to the browser.
Since JSP uses Java, the technology is not restricted to any server-specific platform.

Cold Fusion

Cold Fusion is another server-side scripting language used to develop dynamic web pages.
Cold Fusion is developed by Adobe.

Chili!Soft ASP

Microsoft's ASP technology runs only on Windows platforms.
However, Chili!Soft ASP is a software product that allows ASP to run on UNIX and some other platforms.

Microsoft FrontPage

FrontPage is a website design tool developed by Microsoft.
FrontPage allows users to develop a web site without any deep knowledge of web development.
Most Windows hosting solutions support FrontPage server extensions for users that use FrontPage to develop their web site.
If you plan to use FrontPage, you should look for a Windows hosting solution.

Adobe Dreamweaver

Dreamweaver is a website design tool owned by Adobe Systems.
Dreamweaver allow users to develop a web site without any deep knowledge of web development.
Dreamweaver has support for web technologies such as CSS, JavaScript, ASP.NET, ColdFusion, JavaServer Pages, and PHP.
Dreamweaver is available for both Mac and Windows operating systems.

Secure Server

A secure server can transmit data encrypted.
If you plan to do online creditcard transactions, or other types of web communication that needs to be protected against unauthorized access, your ISP must provide a secure server.





                              

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Web Hosting Tutorial

1:Introduction

How does the Internet work? How can I have my own Web Site?
What is a Web Host? What is an Internet Service Provider?

What is the World Wide Web?

  • The Web is a network of computers all over the world.
  • All the computers in the Web can communicate with each other.
  • All the computers use a communication protocol called HTTP.

How does the  WWW work?

  • Web information is stored in documents called web pages
  • Web pages are files stored on computers called web servers.
  • Computers reading the web pages are called web clients.
  • Web clients view the pages with a program called a web browser.
  • Popular browsers are Internet Explorer and Firefox.

How does a Browser Fetch a Web Page?

  • A browser fetches a page from a web server by a request.
  • A request is a standard HTTP request containing a page address.
  • An address may look like this: http://www.example.com/default.htm.

How does a Browser Display a Web Page?

  • All web pages contain instructions for display.
  • The browser displays the page by reading these instructions.
  • The most common display instructions are called HTML tags.
  • HTML tags look like this <p>This is a paragraph.</p>.

What is a Web Server?

  • The collection of all your web pages is called your web site.
  • To let others view your web pages, you must publish your web site.
  • To publish your work, you must copy your site to a web server.
  • Your own PC can act as a web server if it is connected to a network.
  • Most common is to use an Internet Service Provider (ISP).

What is an Internet Service Provider?

  • ISP stands for Internet Service Provider.
  • An ISP provides Internet Services.
  • A common Internet service is web hosting.
  • Web hosting means storing your web site on a public server.
  • Web hosting normally includes email services.
  • Web hosting often includes domain name registration.

Summary

If you want other people to view your web site, you must copy your site to a public server.
Even if you can use your own PC as a web server, it is more common to let an Internet Service Provider (ISP) host your site.
Included in a Web hosting solution you can expect to find domain name registration and standard email services.
You can read more about domain name registration, email and other services in the next chapters of this tutorial.




2 :Web Hosting Providers


To make your web site visible to the world, you'll have to store it on a web server.

Hosting your own Web site

Hosting your web site on your own server is always an option. Here are some points to consider:

Hardware Expenses

To run a "real" web site, you will have to buy some powerful server hardware. Don't expect that a low cost PC will do the job. You will also need a permanent (24 hours a day ) high-speed connection.

Software Expenses

Remember that server-licenses often are higher than client-licenses. Also note that server-licenses might have limits on number of users.

Labor Expenses

Don't expect low labor expenses. You have to install your own hardware and software. You also have to deal with bugs and viruses, and keep your server constantly running in an environment where "everything could happen".

Using an Internet Service Provider

Renting a server from an Internet Service Provider (ISP) is a common option.
Most small companies store their web site on a server provided by an ISP. Here are some advantages:

Connection Speed

Most ISPs have very fast connections to the Internet.

Powerful Hardware

ISPs often have powerful web servers that can be shared by several companies. You can also expect them to have an effective load balancing, and necessary backup servers.

Security and Stability

ISPs are specialists on web hosting. Expect their servers to have more than 99% up time, the latest software patches, and the best virus protection.

Things to Consider with an ISP

24-hour support

Make sure your ISP offers 24-hours support. Don't put yourself in a situation where you cannot fix critical problems without having to wait until the next working day. Toll-free phone could be vital if you don't want to pay for long distance calls.

Daily Backup

Make sure your ISP runs a daily backup routine, otherwise you may lose some valuable data.

Traffic Volume

Study the ISP's traffic volume restrictions. Make sure that you don't have to pay a fortune for unexpected high traffic if your web site becomes popular.

Bandwidth or Content Restrictions

Study the ISP's bandwidth and content restrictions. If you plan to publish pictures or broadcast video or sound, make sure that you can.

E-mail Capabilities

Make sure your ISP supports the e-mail capabilities you need.

Front Page Extensions

If you use FrontPage to develop your web site, make sure your ISP supports FrontPage server extensions.

Database Access

If you plan to use data from databases on your web site, make sure your ISP supports the database access you need.






3 : Web Hosting Domain Names


A domain name is a unique name for your web site.
Choosing a hosting solution should include domain name registration.
Your domain name should be easy to remember and easy to type.

What is a Domain Name?

A domain name is a unique name for a web site, like blogger.com .
Domain names must be registered. When domain names are registered, they are added to a large domain name register. In addition, information about the web site, including the IP address, is stored on a DNS server.
DNS stands for Domain Name System. A DNS server is responsible for informing all other computers on the Internet about the domain name and the web site address.

Registering a Domain

Domains can be registered from domain name registration companies.
These companies provide interfaces to search for available domain names, and they offer a variety of domain name extensions that can be registered at the same time.

Choosing a Domain Name

Choosing a domain name is a major step for any individual or organization.
New domain name extensions and creative thinking still offer thousands of excellent domain names!
When choosing a name, it is important to consider the purpose of a domain name, which is to provide an easy way to reach your web site.
The best domains have the following characteristics:
Short - People don't like to type! A short domain name is easier to type, read, and remember.
Meaningful - A short domain is nothing without meaning, 34i4nh.com is not easy to enter or to remember. Select a domain that relates to your site in a way that people will understand.
Clear - Clarity is important when selecting a domain name. Avoid a name that is difficult to spell or pronounce.
Exposure - Names that are short and easy to remember are an asset. In addition to visitors, also consider search engines. Search engines index your site and rank it for relevance against terms people search for. In order to maximize your sites exposure, consider including a relevant search term in your domain. Of course, only consider this if it still maintains a short, clear and meaningful domain name.

Sub Domains

Most people are unaware that they use sub domains daily. The famous "www" of the World Wide Web is an example of a sub domain. Sub domains can be created on a DNS server, and they don't need to be registered with a domain name registrar, of course, the original domain name needs to be registered before a sub domain could be created.
Examples of sub domains used on the internet are http://php-video-tutorials.blogspot.com/  and http://worldwebdesigner.blogspot.com/.
Sub domains can be requested from your web hosting provider.

False Domain Names - Directory Listings

Some providers will offer you a name under their own name, like:  www.theircompany.com/yourcompany/
This is not a real domain name, it is a directory - and you should try to avoid it.
Directory domains are not desirable, especially for companies.
Typically, directory domains are used for personal web sites and free web sites provided by an ISP, you may have seen www.theircompany.com/~username as an address.
Competition in domain name registration has resulted in a dramatic decrease in pricing, so domain sharing is not common, since it is possible to register a domain name for only $15 per year.

Expired Domains

Another source for domain registrations is expired domains.
When you register a domain, think of it as a rental, assuming there are no legal or trademark issues with the domain name, you are free to use it as long as you continue to pay the yearly fee (you can now register in advance as many as 10 years). Some people register domains as speculators, hoping that they can later sell them, while others may have planned to use a domain and never had the time. The result is that domains that were previously registered, become available again.

Use Your Domain Name

After you have chosen and registered your own domain name, make sure you use it on all your web pages, and on all your correspondence, like e-mail and traditional mail.
It is important to let other people be aware of your domain name, and to inform your partners and customers about your web site.






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