Pada minggu kesebelas kelas Dr. Johari, sebelum memulakan sesi Pengajaran & Pembelajaran (P&P), Dr. Johari telah melakukan MID-TEST mengenai kesemua Bab yang telah dipelajari sebelumnya daripada minggu pertama hingga minggu kelapan yang telah diajar oleh pensyarah Dr. Norasyikin. Ujian telah mengambil masa selama 1jam. Kemudiannya, barulah Dr. Johari memulakan kuliah yang bertajuk Internet Infrastructure.
What is internet....?????
• A global collection of network
• Interconnected computers work by
transmitting data through a special type of packet
switching which is known as
the IP (internet protocol).
• When you connect to the
Internet, your computer becomes part of a network.
Internet VS WWW...?????
- The Internet is not synonymous with World Wide Web.
- The Internet is a massive network of
networks, a networking infrastructure. It connects
millions of computers
together globally, forming a network in which any computer can
communicate with
any other computer as long as they are both connected to the Internet.
- The
World Wide Web, or simply Web, is a way of accessing information over the
medium
of the Internet. It is an information-sharing model that is built on top
of the Internet.
A Hierarchy of Networks :
•From a single computer to LAN
•From LAN to ISP
•ISP to WWW
Internet service provider (ISP) :
•ISP
Also called IAP (Internet Access Provider).
•Company
that provides access to the internet.
•Usually
ISP provide software package, username, password and access phone number and
modem
•ISP
are connected to one another through Network Access Points (NAPs)
•Example
of ISP : TM
Internet Protocol :
•Every
machine on the Internet has a unique identifying number, called an IP Address.
•The
IP stands for Internet
Protocol, which is the language that computers
use to communicate over the Internet.
•A
protocol is the pre-defined
way that someone who wants to use a service talks with that service. The "someone" could be a
person, but more often it is a computer program like a Web browser.
An IP address consist of 32 bits, often
shown as 4 octets of numbers from 0-255
161.139.52.254
161 : Area or location of network (eg.
UTM)
139 : Server no
52 : Division/unit no (FP, FKM etc)
254 : Computer no
HTTP :
•Hyper Text Transfer Protocol
•HTTP defines how messages are formatted
and transmitted and what actions Web servers and browsers should take in
response to various command
•For example, when you enter a URL in
browser, this actually send an HTTP command to the web server directing it to
fetch and transmit the requested page.
6 type of internet connection and access :
1. Dial Connection
2. Cable
3. Satellite internet access
4. Fixed wireless
5. Broadband
6. Mobile wireless
