IT1451 -WEB TECHNOLOGY

9. Define protocol tunneling.

Protocol tunneling is the process of encapsulating one protocol within another

protocol that operates on the same layer.

10. Define URI, URL, URN.

1. URI (Uniform Resource Identifier): It identifies an object on the Internet.

2. URL (Uniform Resource Locator): It is a specification for identifying an such as a file, newsgroup, CGI program or e-mail address by indicating the exact location on the internet.

3. URN (Uniform Resource Name): It is a method for referencing an object   without declaring the full path to the object.

11. What are the components of HTTP URL?

The components are host, an optional port, path, filename, and section and query string

12. Define URL encoding.

URL encoding involves replacing all unsafe and nonprintable characters with a

 Percent sign (%) followed by two hexadecimal digits corresponding to the character’s ASCII value.

13. Explain the various Specifics of SMTP Protocol?

 Operational Scenario.

 Command Semantics & Procedures

 Forwaring of Messages.

 Example of Forwarding

14. What is meant by Scripting Language?Explain any one of the Scripting Languages?

    Definition-To create Dynamic Web content.

        Eg:VB Script & Java Script

        Introduction about VB Script

        Functions of VB Script

       VB Script Execution Environment

        Embeding VB Script in to HTML.

        Objects & Events.

       Manipulating VB Script Variables with Operators.

        Functions & Procedures.

15. Explain the various methodologies by which you can retrieve data from Internet?

     Internet Search Engine

     Protocols used to retrieve the Data

     i)FTP –Concepts

     Commands &Semantics

     Anonymous FTP

     ii)TELNET

     Network Virtual Treminal

     Commands *Control Functions

     Negotiable Options

     iii)HTTP

     iv)TFTP (16