The document discusses the basics of how the internet works. It explains that the internet is a worldwide connection of computers called the Internet. It also defines URLs as the address for resources on the internet and IP addresses as the unique address for each device connected to the internet. An IP address has two parts, a network ID and a host ID, that identify the network and specific device. Common IP address classes are shown as examples.

1. 4.1
–
4
1. Internet)
Internet )
2.
URL

2. INTERNET
3.
IP ADDRESS
IP Address
Internet Protocal
Address
TCP/IP
IP

3. IP
4
192.168.100.1
172.16.10.1 IP
Address
4 Network
ID Host ID
computer network
network
Network ID Host

4. ID IP Address
class
4.
5.

5. 6.
http://th.wikipedia.org/wik
7.
(31 2492 — 1

6. 2533)
http://th.wikipedia.org/wik

7. 4.2
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-
-

8. -
- Search Engine
- “Work@home”
-
-
-
-
-

9. -
- MP3
-
-
-
-
-
-

10. - Chat
Room)
1
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