Jenis-jenis Internet
Two types of Internet Connection :
· -Dial-up Connection
· -Broadband Internet Connection /Direct Connection
Dial-up Connection :
- Dial-up Internet access is a form of Internet access that uses the facilities of the public switched telephone network (PSTN) to establish a connection to an Internet service provider (ISP) by dialing a telephone number on a conventional telephone line. The user's computer or router uses an attached modem to encode and decode information into and from audio frequency signals, respectively.
Two types of Dial-up connection:
- Conventional Dial-up
- ISDN ( Integrated Service Digital Network )
Conventional Dial-up :
- To connect to the Internet, your computer dials its modem and connects to a modem attached to a computer belonging to your ISP.
- PC has to dial via a phone line to connect
-Characteristics of Conventional dial-up:
Slower, but cheaper Ties up phone lines Relatively secure from hackers Example :- Jaring, TMNet
Advantages
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Disadvantages
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-Security : (since your are not continually connected to the Internet, it is much less likely the hackers will gain access to your computer via Internet)
-Include inexpensive hardware
-Ease of setup and use
-Availability: provides the user with the convenience of using his account.
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-Slow connection speed (max of 56Kbps)
-Inconvenience (having to instruct your PC to dial up your ISP every time you want to check your email or view a website )
• Telephone line will be tied up while accessing the Internet
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ISDN ( Integrated Services Digital Network) :
- also transfer data over ordinary telephone lines
- Typically uses two phone lines to transfer data
- ISDN requires a special ISDN modem
- Characteristics of ISDN:
Faster, but pricey Doesn’t tie up phone line Used by businesses and individuals
(always on connections)
Many home and small business users connect to the Internet via high-speed broadband Internet service PC is continually connected to the Internet Direct connections are typically broadband Used in the home and office Because you are always connected, it is important to protect your computer from hackers.
DSL (Digital Subscriber Line) :
Broadband delivered over telephone lines
-Must be less than 3 miles from a switching station
-Transmits over telephone lines but does not tie up the line
Fast, direct Internet access via standard telephone line ADSL is one of the more popular types of DSLs Requires DSL modem Available in urban areas Half or less of cable speeds Example :- Streamyx without WiFi
Cable Internet Service/ Cable Modem :
Cable modem: Most widely used home broadband connection Provides high-speed Internet access through the cable television network via a cable modem.
Fixed wireless :
Uses radio transmission towers rather than satellites Not available in all areas Expected to use WiMAX Provides high-speed Internet connections using a dish-shaped antenna to communicate via radio signals.
Satellite Internet service :
• Broadband option for rural areas
o More expensive than cable or DSL
o Available in many areas other broadband options are not
• Provides high-speed Internet connections via satellite.
• A satellite dish communicates with a satellite modem.
Fiber to the Premises (FTTP) :
Also known as Broadband over Fiber (BoF) Delivers over fiber-optic cabling all the way to the building
Available in limited areas Fast but expensive Uses fiber-optic cable Provide high-speed Internet access to house and business users.
Cellular Radio Network :
Also known as Mobile wireless Access via mobile phone or device Offers high-speed Internet connections to devices with built-in compatible technology or computers with wireless modems. Example provider:- Celcom, Maxis, DiGi
Advantages
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Disadvantages
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Advantages of Broadband
1.Connection speed is up to 100 times faster than dial-up connection. Online gaming is only possible using a broadband internet access.
2. It does not affect the phone line. For DSL internet access, you can use the same phone line for both voice/fax and data transmission.
3. It is convenient because the internet connection is always on.
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Disadvantages of Broadband
1. High monthly fee compared to dialup internet access.
2. Higher security risk than dial up connection. A personal firewall is needed to protect your computer.
3. Not all phone wires are equipped for DSL service. May not be available in rural or remote areas.
4. Not all cable TV networks are equipped for cable internet access. May not be available in rural or remote
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Factors to consider to help you choose the right internet connection :
Availability
• not all services are available on all locations.
Speed/Performance
• people in the neighbourhood who use the same service simultaneously time may draw on your service and slow the speed of the cable connection.
• Wi-Fi is only recommended for personal use because of limited speed.
Security Levels
• Different connection have different security level.
Price
• The most affordable one is WiFi, (low cost), you can get an unlimited connection but not for business purposes because of speed limitation and stability.
Support Services
• One of the top priorities when choosing a Internet Service Provider/Internet Connection is their ability to offer the best customer service and technical support.
Type Of Internet Connection :
BROADBAND VS. DIAL-UP
• Broadband — or high-speed — Internet service has seen a rise in popularity over the last decade, becoming a standard communication service over its slower counter-part, dial-up Internet. You can use the broadband vs. dial-up chart on this page to learn the differences between each type of Internet connectivity and decide whether or not to move into the high-speed era
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