Internet Connection Problems

      All of us use Windows7 as the operating software, and our computers are connected together within the workgroup of the LAN (local area network). So we should gain the benefit of its sharing capability. Here we go!

1. FOLDER SHARING
       Be sure we have to specify what folder that we want to share?  

"BOOKS" is the folder of us to be shared.
โฟลเดอร์ "BOOKS" คือโฟลเดอร์ที่เราอยากแชร์

 Make a right clicking with the folder, the dialogue box appears. Select the "Sharing" tab and the "Advanced Sharing" button

Now the folder has never been shared yet (Not Shared)
ตอนนี้โฟลเดอร์นี้มีสถานภาพไม่ได้ถูกแชร์ไว้

 Properties window of the folder appears and we should select to share it with others. Now we can see the maximum number of users to simultaneously enter to the folder is 20. Then we can click on the "Permission" button.

Tick the check-box, and we can change the share name or ignore it.
ติ๊กเลือกว่าจะแชร์  จะเปลี่ยน/หรือไม่เปลี่ยนชื่อที่จะแชร์ก็ได้

After clicking on the permission button, the Permissions window shows up, you can add any user e.g. "student" and you can change the permission type of the user.

We can add user/ specify his permission level.
เราสามารถเพิ่มยูสเซอร์ / ระบุระดับการอนุญาตใช้งานโฟลเดอร์ของเราแก่เขา

Finally click on the "Apply" button, the folder now has been shared. 

Well, our folder has been shared.
Folder ของเราได้รับการแชร์กันใช้เรียบร้อยแล้ว

 2. PRINTER SHARING
      Click the "Start button" of Windows7 desktop, the pop-up menu appears, then select "Devices and Printers", the target printer of us will be appeared.

Select the printer

 Make a right click on the printer icon, the select menu will show up, then select "Printers properties" option.  Then we can operate sharing easily.

Select : Printer Properties

Select the Sharing Tab

Select to share

Internet Connection Problems

Internet Connection Problems ปัญหาการเชื่อมต่ออินเทอร์เน็ต

Sometimes the problems caused by unintentional human errors

sometimes Internet connection problem can be our frustration. Rather than pressing F5-key and  trying to reload the website when we experience a problem, here are some ways we can troubleshoot the problem and identify the cause.
Ensure we check the physical connections before getting too involved with troubleshooting. Anyone could have accidentally kicked the router or modem’s power cable or pulled an Ethernet cable out of a socket, causing the problem.

Ping

Ping  (wikipedia.org) is a computer network administration utility used to test the reach-ability of a host on an Internet Protocol (IP) network and to measure the round-trip time for messages sent from the originating host to a destination computer.

The name comes from active sonar terminology which sends a pulse of sound and listens for the echo to detect objects underwater.

One of the first things to try when our connection doesn’t seem to be working properly is the ping command. Open a Command Prompt window from your "Start button" using the "cmd" command  and type a command like ping google.com .  

This command sends several packets to the address you specify.
We can see that everything is working fine.
There’s 0% packet loss and the time each packet takes is fairly low.  

คำสั่ง ping จะส่ง packets (ข้อมูลในหน่วยวินาที) ไปยังเครื่องที่เป็นโฮสต์ปลายทาง
จากภาพ จะเห็นว่า คำสั่งทำงานได้ดี  ไม่มีการสูญเสีย packet เลย  คือ ส่งไป 4 ได้คืน 4
และใช้เวลาน้อย 13-25 (เฉลี่ย 18) มิลลิวินาที 

  

Modem & Router Issues

 Sometimes our modems or routers can cause the problem of Internet connection. A modem is a device that communicates with your Internet service provider (ISP), e.g. TOT, while the router shares the connection among all the computers and other networked devices in our home network. In my case (and also other students' cases ) , the modem and the router of mine is the same device, so it is called the "modem-router".
   Let's take a look at the modem-router. If green lights are flashing on it, that’s normal and indicates network traffic. If we see a steady, blinking orange light, that generally indicates the problem. 

All Green Lights Mean Normality

If the lights indicate that either devices are experiencing a problem, try unplugging them and plugging them back in. This is just like restarting our computer. If we still experience problems, we may need to perform a factory reset on your router (to see its manual).

Our Classroom102
What is about the problem when we are in the classroom? Because the IPaddress conflict can be occurred  anytime, so any computer in the classroom102 can be kicked off easily by the gateway computer of the Media Center which we have to lean on.

 Yes, we cannot connect to the Net directly but always request Internet sharing with the server computer of School Media Center through the local area network.

There are variety kinds of computer in the classroom102, both old and new, big-name and no-name, useable and unusable 

Because any student can log on any computer in our classroom with the administrative account, so he has the full permissions to change/config anything about the network, then any problem can be occurred anytime.