What is a Raspberry Pi?

Here some example of raspberry pi.

 

• The Raspberry Pi is a credit-card sized computer that plugs into your TV and a keyboard. It is a capable little computer which can be used in electronics projects, and for many of the things that your desktop PC does, like spreadsheets, word-processing and games.
• Plays high-definition video
• The Raspberry Pi does not come with a real-time clock, which means it cannot keep track of the time of day while it is not running.As alternatives, a program running on the Pi can get the time from a network time server
• The Raspberry Pi primarily uses Linux kernel-based operating system

source: http://en.wikipedia.org/wiki/Raspberry_Pi

Besides raspberry Pi,I also gain another thing in my class. Parallel computing.

Parallel computing is the simultaneous use of multiple compute resources to solve a computational problem:

• A problem is broken into discrete parts that can be solved concurrently
• Each part is further broken down to a series of instructions
• Instructions from each part execute simultaneously on different processors
• An overall control/coordination mechanism is employed

                      

Overall parallel computing provide faster execution time, so the throughput will be higher. But it also require hardware and also more power requirements. So is not good for low power and mobile devices.

So the second week for this class,sir azrul bringing few boxes to our class and tadaaa

figure 1

 

figure 2

What is that things? There are router (figure 1) and switch (figure 2). 

Okay now what is a function of router?
A router is a device that forwards data packets along networks. A router is connected to at least two networks, commonly two LANs or WANs or a LAN and its ISP's network. 

Function of switch?
Connect devices together on a computer network, by using a form of packet switching to forward data to the destination device

Then,sir azrul ask us to setup the switch and router,and HAHA most of us have no idea what to do.

*i really really have no idea what to do,so I end up wandering around class and observing my classmates struggling with that thingy, I point pang with so much effort plug in and out those wire and I heard some of my classmates claim that "kita taknak IP unisza,kita nak IP sendiri" and "kita ada masalah tak boleh nak interact dengan pc lain even kita dekat satu kawasan yg sama"

Why?

Our router is connected directly to the Internet, and it’s assigned our public IP address (which may change over time). Router is then responsible for sharing our public IP address among the other computers and connected devices.Router assigns local IP addresses to our connected devices (laptop for example). This allows them to communicate amongst each other behind  router in our class. However, these local IP addresses aren’t reachable from the Internet. In other words, our public IP address might be something like 23.24.35.63. Anyone on the Internet can try to connect to this address, and they’d reach our router. Our computer’s private IP address might be something like 192.168.1.100. When someone on the Internet tries to connect to this address, their computer will look for the address 192.168.1.100 on their local network.

That may explain a little. 

p/s: i submit my posts (week 1 and week 2) since I just accepted an invitation mail from you sir. Im sorry for being late. Oh selamat hari raya aidil adha by the way =)