- Largest and most well-known computer network , linking millions of computers all over the world
| ADVANTAGES OF INTERNET | DISADVANTAGES OF INTERNET |
| Easy access to many type of information , The "search engine" or "subject directory" on the internet can help you find information about any subject that you need . | Theft of personal information , If you use internet for online banking , social networking or other services , you may risk a theft to your personal information such as address , credit card . |
| Services , Many services are now provided on Internet such as online banking , job seeking and hotel reservations . These services are not available off-line or cost more . | Spamming , Sending unwanted e-mails in bulk , which provide no purpose and needlesly obstruct the entire system . It can makes your internet slower and less reliable . |
| Buy or sell products , There are many online stores and sites that can be used to look for the products and buy them using your credit card . | Virus threat , Virus programs are inconspicous and may get activated if you click a seemingly harmless link . Computers connected to the Internet are very prone to targeted virus attacks and may end up crashing . |
| Downloading software , You can download countless games , music , videos and other entertainment software from the Internet , most of which are free . | Pornography , Internet allows you to access and download millions of pornographic photos , videos . |
~INTERNET , EXTRANET , INTRANET~
- Similarity - provide information to use
| CATEGORIES | INTERNET | INTRANET | EXTRANET |
| Definition | Largest and most well-known computer network , linking millions of computers all over the world . | Network that belongs to an enterprise and is a accesible only by that enterprisese employees or authorized users . | Private network that connect more than one organizations that use internet technologies to allow suppliers , customers and business partners limited access to their network . |
| Types Of Users | Any individual | Authorized employees only | Authorized groups from collaborating companies |
| Usages | Provide information for public (all information) | Provide information for organization employees (telephone directories) | Provide information to suppliers , customers and business partners (check sale stock) |
| Security | Loose - security control are lower | Higher - security control are higher | High - security control are high |
| Types Of Access | Unlimited , public and no restrictions | Private and restricted | Private and outside authorized partners |
| Information | General , public and advertisement | Specific , corporate and proprietary | Shared in authorized collaborating group |
~USES OF INTERNET~
- View web pages on the WWW
- Sending and receiving e-mail messages
- Sharing files
- Communications using VoIP
- Playing multi-player games
- Listening to streamed music
DIAL UP CONNECTION(LOW SPEED)  |
| Definition | Low speed internet connection that use standard modem to access the internet via standard telephone line , data transmitted in analog signal |
| Advantages | More secure – not continually connected means it is much less anyone such as hacker will gain access to your computer via Internet |
| Disadvantages |
Slow Speed – maximum speed of data travel is 56 Kbps Tied-up Phone Line – cannot use telephone line while online |
BROADBAND
CONNECTION (HIGH SPEED)  |
| Definition | High speed internet connection provided through wi-fi , FTTP , fixed wireless , cellular radio network , cable internet service , DSL , satellite internet services |
| Advantages |
High Speed – maximum speed of data travel is 8.45 Mbps Doesn’t Tied-up Phone line – can use telephone line while
online |
| Disadvantages | Not Secure – virus are easily spread because always on connection |
| Similarities | Both connect internet through telephone line |
|
TYPES OF
INTERNET CONNECTION |
TRANSMISSION MEDIA Physical system used to carry a
communication signal from one to another |
COMMUNICATION DEVICES Hardware component that enables a
computer to send & receive data to and from one or more computers |
INTERNET SERVICE PROVIDER Business that provides individuals &
organizations access to the internet free or a fee |
DATA TRANSFER RATE Speed at which data can be transmitted
. |
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HIGH
–SPEED BROADBAND CONNECTION | ||||||||
|
CABLE
INTERNET SERVICE Provides high-speed internet connection through cable television via cable modem |
Coxial Cable |
Cable Modem |
Astro TV |
128 Kbps 52 to Mbps |
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DIGITAL
SUBSCRIBEL LINE (DSL) Provide
high-speed internet connection using regular copper telephone line |
Unpaired Twisted-Pair Cable |
Network Interface Card |
Streamyx |
128 Kbps to 8.45 Mbps |
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CELLULAR
RADIO NETWORK Provides
high-speed internet connection to devices with built-in computer with
wireless modem |
Radio Signal |
Wireless Modem |
Maxis |
Up to 15 Mbps |
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FIBER TO
THE PREMISES (FTTP) Provides
high-speed internet connection uses fiber-optic cable to home |
Fiber-Optic Cable |
Wireless Access Point |
TM Unifi |
5 Mbps to 100 Mbps |
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WI-FI Provides
high-speed internet connection uses radio signals to wireless device |
Broadcast Radio |
Wireless Adapter Card |
Yes |
108 Mbps & Higher |
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SATELLITE
INTERNET SERVICES Provides
high-speed internet connection via satellite to a satellite dish that
communicates with satellite modem |
Satellite |
Satellite Dish |
|
1 Gbps |
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FIXED WIRELESS Provides high-speed internet connection
using a dish-shaped antenna on your house to communicates with a tower via
radio signal |
Radio Signal |
Tower Location |
|
1 Gbps |
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LOW-SPEED INTERNET CONNECTION | ||||||||
|
DIAL-UP CONNECTION |
Twisted Pair-Cable |
Modem |
Telekom Malaysia |
Limited to 56 Kbps |
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~INTERNET SERVICES PROVIDER~
- Business that provides individual and organizations access to the internet free or for a fee
| SERVICES | RESPONSIBILITIES | EXAMPLE |
| Web site hosting & development | Providing and maintaining a connection to the Internet | Celcom |
| E-mail hosting | Support the hardware and software needed for the connection services | TMNet |
| Domain name registration | To protect their site and network from external threats such as viruses | Yes |
| - | To provide 24-hour customer service and technical support | Digi |
~INTERNET PROTOCOL ADDRESS~
- Uniquely identifies each computer or device connected to the Internet
- It exists as the Internet relies on an addressing system much like the postal service to send data and information to a computer at a specific destination
| Internet Protocol version 4 (IPv4) | Internet Protocol version 6 (IPv6) |
| Uses 32 bit addresses , have 4 parts separated by period (.) , allow 2^32 possible unique addresses | Uses 128 bit addresses , have 8 parts separated by colons (:) , allow 2^128 possible unique addresses |
| Number in each group is between 0 and 255 | Number in each group is between 0 and F |
| 216.27.61.137 First Portion - 216 , identifies network Last Portion - 27.61.137 , identifies the specific host | 2001:0db8:3c4d:22ff:432a:abcd:ef12:fd32 Global Prefix - 2001:0db8:3c4d , identify the network Subnet -22ff , identify the location within network Interface ID - 432a:abcd:ef12:fd32 , identify specific host |
~DOMAIN NAME~
- Text version of an IP address
- www.google.com->gtop-level domain
- Domain name system (DNS) is the method that the internet uses to store domain names and their corresponding IP addresses .
| gTLD | Purpose | ccTLD | Purpose |
| .com | Commercial organizations , business and companies | .my | Malaysia |
| .edu | Educational institutions | .uk | United Kingdom |
| .gov | Government agencies | .sg | Singapore |
| .net | Network providers or commercial companies | .jp | Japanese |
| .org | Nonprofit organizations | - | - |
{NETWORK ARCHITECTURE} {NETWORK TOPOLOGY} {CLASSIFICATION OF NETWORK} {INTERNET} {INTERNET SERVICE}