I’m using the Internet everyday, however, I never knew about how the Internet works until I entered the course – IERG3310 Computer Networks.
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| Fig.1 Computer Networks |
After the first lesson of this course, in fact, many of my past ideas of computer networks have been overthrown.
In the past, I thought that when we are surfing on the Internet, our computers are sending some orders to the Internet and then the Internet will send back the information that we need.
But the teacher told us that there will be many other procedures before we can get the information. For example, “Three-Way
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| Fig.2 Three-Way Handshake |
There is a series of numbers representing the IP address of our computer, which confused me a lot every time I saw it in the past. I didn’t know what each group of numbers represents and how important they are. They were just massy code for me.
But after the class, I learned something about the IP address. Although I still don’t know what each group of numbers represents, I have known that without IP addresses, we could not communicate with others on the Internet.
As there are so many Internet clients in the world nowadays, we can’t assign everyone an IP address. Thus, when we use the Internet, our computer will be assigned an IP address, which are usually different every time but will never be the same as the one of the other computer at the same moment.
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| Fig.3 Different IP Addresses |
This is the first time that I am exposed to Computer Net work and I have just got some simple concept of it and thus, I am still confuse by many things. But the course is interesting, and I have already been attracted by it, and I hope that I could solve the problems soon!
