Internet Technology Web Page
Major KP Krishna Kumar
ME(CSE)


My Network Tools

    I have tried to understand the various network tools available. Just by logging on to the Internet, how much information are we passing about ourselves to others without our knowledge ? The various tools were tried one by one.

         * Ping
            This seems to be the first tool that anybody uses to check a network connection.Is it  an abbreviation ?...

        *  nslookup
            What will I do if I want to know the IP address of another machine on the net if I  know its name? I tried to explore ....
       
        *  traceroute  
             Can I trace the path taken by a packet once it leaves my machine? It seems I can ....  
   
        * whois
            This word is more self explanatory. Find out how useful it is ...

        * Proxy test
             I thought connecting to Internet via a proxy  would hide a great deal of information  about me from the Intrenet. I was wrong . Here are the results ...   

          * IP Address     
        Can I specify an IP address as   http://3626046468/  instead of  www.angelfire.com (216.33.20.4) . They say you can. What is the conversion like? Convert these numbers to hex individually.  Concatenate them and then convert them back from hex, you'll get your number! Obviously you
can reverse this to get back to the original IP address.

        So, 216.33.20.4 = D8 21 14 04 (in HEX) = 3626046468

        Netscape did not accept my request. But on pinging I got the result:

      PING 3626046468 (216.33.20.4) from 144.16.67.62 : 56(84) bytes of data.
My first XML Page

    Having heard a lot about XML, I decided to understand what it is, how it is different from html and create my first XML document.
    click here

    Not very nice !!! It does not have a stylesheet. So I created my first CSS. Now my document looked a bit better.View

     I then tried with xsl and created the  XSL  stylesheet.Adding that to my document the document looked like this. View

   I have tried to use Xlinks and Xpointers in an xml document.

My Hindi Page

    Translation of a W3C document using Yudit editor. The steps we followed are given here.
    The WAI document in Hindi is here.

Hobb's Internet Timeline

  A brief on the evolution of Internet as recorded in Hobb's Timeline


Technology Section

       Here I have tried to learn more about the underlying technologies of the Internet.

        *  Network monitoring
            Various techniques are used to determine what ports (or similar protocol abstraction) of a host are listening for connections. These ports represent potential communication channels. Mapping their existence facilitates the exchange of information with the host, and thus it is quite  useful for anyone wishing to explore their networked environment, including hackers. Despite what you have heard from the media, the Internet  is NOT all about TCP port 80.

       *  Gigabit Ethernet
             The Ethernet technology was limited to a speed of 100 Mbps or so I thought. Then I   came across this technology. I have tried to understand the Ethernet technology and  Gigabit ethernet in particular.  What are the differences that has enabled transfer  speeds upto 10   Gigabits per sec using the same standard?

       *   Protocols
             A brief look at some of the undelying protocols used in the Internet.
   
              *  ftp

              *  smtp
   
              *  tcp
           
              *   ip
   
             
      *  W3C Technologies
              W3C is the focal point of implementation of standards in the internet. A brief overview at the various technologies that has been                            advocated.