My sister has just started with her graduation in Bsc. One of her subjects is computer science. In that they are currently covering systems architecture .Even though she had computer science in her boards I was really surprised that she still was not clear on many areas. I was speaking to her yesterday night when we discovered that both of us were covering the same topics
Me: Hi! Kari
Kari: Hi
Me: How is college , I hope you are enjoying yourself,
Kari: Yeah I am after school this feels like freedom
Me: I know exactly how you feel ….hope studies are going well too
Kari: Yeah except comp science everything is great
Me: Hey I am also having that subject but I find it pretty good
Kari: Trust me sis you don’t have systems architecture so be happy
Me: Well I am doing that only, Let me try and explain you
Kari: Please I always knew more than you in computers
Me: At least let me try
Kari: Ok I am all ears
Me: You know all about hardware and software right
Kari: Of course what you take me for
Me: Ok so do you know about applications and platform?
Kari: Nope you got me there all I Know about platforms is that it is something like vista or Linux
Me: You are right in a way, See it is your operating system that sits on your hardware, together it is called platform
Kari: I lost you there
Me: Your hardware without operating systems is dead and together it is a platform for applications to operate in. For example you have vistas on your hardware, in it you have one application called word processor working.
Kari: Or it can be excel sheet or something
Me: Exactly so platforms which are connected to each other so as to allow flow of data between various applications running on them is system architecture.
Kari: Got it, but then you have something like two tier and three tier
Me: yeah
Kari: Have you done that it went over my head in the class
Me: Yeah I can explain you that. First we have single tier in that we have data and application on the same computer.
Kari: Something like what we have in our laptop.
Me: Exactly. Now what if you have multiple users?
Kari: Oh we can have dumb terminals
Me: Yeah but then that central computer gets bogged down and the speed is slow .
Kari: Then what do we do
Me: What if we separate the data and the application
Kari: Can we do that?
Me: Yes have all the data at one place and have applications on user computer which are all connected by LAN
Kari: hmmmmmm
Me: This is what two tiers is
Kari: Next we have three tiers
Me: Very smart. Yes to overcome the problem Geographic dispersion of employees
Kari: Carry on this is getting interesting.
Me: See in three tiers you further separate your application. Upfront you have your interface where the client sits and at the background at one place you have all your processing.
Kari: But are we not going backward to single tier
Me: Not exactly because earlier it was the interface which used consume a lot of processing.
Kari: Ok
Me: In multi tiers we go a step forward. We use the web so we don’t have the problem of updating interfaces now and then. Here, a web server is placed between the application server and the user. Your interface or client server is replaced by browser.
Kari: Is that it
Me: Yeah that’s about it
Kari: Wow thanks sis really appreciate it
Me: Hi! Kari
Kari: Hi
Me: How is college , I hope you are enjoying yourself,
Kari: Yeah I am after school this feels like freedom
Me: I know exactly how you feel ….hope studies are going well too
Kari: Yeah except comp science everything is great
Me: Hey I am also having that subject but I find it pretty good
Kari: Trust me sis you don’t have systems architecture so be happy
Me: Well I am doing that only, Let me try and explain you
Kari: Please I always knew more than you in computers
Me: At least let me try
Kari: Ok I am all ears
Me: You know all about hardware and software right
Kari: Of course what you take me for
Me: Ok so do you know about applications and platform?
Kari: Nope you got me there all I Know about platforms is that it is something like vista or Linux
Me: You are right in a way, See it is your operating system that sits on your hardware, together it is called platform
Kari: I lost you there
Me: Your hardware without operating systems is dead and together it is a platform for applications to operate in. For example you have vistas on your hardware, in it you have one application called word processor working.
Kari: Or it can be excel sheet or something
Me: Exactly so platforms which are connected to each other so as to allow flow of data between various applications running on them is system architecture.
Kari: Got it, but then you have something like two tier and three tier
Me: yeah
Kari: Have you done that it went over my head in the class
Me: Yeah I can explain you that. First we have single tier in that we have data and application on the same computer.
Kari: Something like what we have in our laptop.
Me: Exactly. Now what if you have multiple users?
Kari: Oh we can have dumb terminals
Me: Yeah but then that central computer gets bogged down and the speed is slow .
Kari: Then what do we do
Me: What if we separate the data and the application
Kari: Can we do that?
Me: Yes have all the data at one place and have applications on user computer which are all connected by LAN
Kari: hmmmmmm
Me: This is what two tiers is
Kari: Next we have three tiers
Me: Very smart. Yes to overcome the problem Geographic dispersion of employees
Kari: Carry on this is getting interesting.
Me: See in three tiers you further separate your application. Upfront you have your interface where the client sits and at the background at one place you have all your processing.
Kari: But are we not going backward to single tier
Me: Not exactly because earlier it was the interface which used consume a lot of processing.
Kari: Ok
Me: In multi tiers we go a step forward. We use the web so we don’t have the problem of updating interfaces now and then. Here, a web server is placed between the application server and the user. Your interface or client server is replaced by browser.
Kari: Is that it
Me: Yeah that’s about it
Kari: Wow thanks sis really appreciate it
1 comment:
good
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