THE INTERNET CONNECTION

2 TYPES OF INTERNET CONNECTION
  1. DIAL UP CONNECTION
  2.  BROADBAND INTERNET CONNECTION/ DIRECT CONNECTION

DIAL UP CONNECTION

Dial- up connection



⇉CONVENTIONAL DIAL-UP
⇉ISDN (INTERGRATED 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: TMNet

ADVANTAGES
DISADVANTAGES
Security : ( since you are not continually connected to the Internet, it is much less likely the hackers will gain access to your computer via Internet.
Slow connection speed (max of 56 Kbps)
 Include inexpensive hardware
Inconvenience( having to instruct ypur PC to dial up your ISP everytime you want to check your email or view a website
Ease of set up and use
Telephone line will be tied up when using the telephone line
Availability: provides the user with the convenience of using his account.





ISDN (Integrated Services Digital Network)

→also transfer data over ordinary telephone lines
→typically  uses two phone lines to transfer data
→requires special ISDN modem
→ characteristics
     - faster, but pricey
     - doesn't tie up phone line
     - used by businesses and individuals.
DIRECT CONNECTION/ BROADBAND INTERNET CONNECTION


  • Many home and small businesses 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.

Types of direct connection

  1. DSL
  2. Fiber to the Premises (FTTP)
  3. Fixed Wireless
  4. Cellular Radio Network
  5. Cable Internet Service
  6. Wi-Fi
  7. Satellite Internet Service

1. DSL

↻ BROADBAND DELIVERED OVER TELEPHONE LINES.
 ↻ Must be less than 3 miles from a switching station
 ↻ Transmits over telephone lines but does not tie a up the line.
↻ Fast, direct Internet access via standard telephone line.
↻ ADSL is one of the more popular type of DSLs. 
↻  Requires DSL modem.
↻ Available in urban areas.
↻ Half or less of cable speeds.
↻ Example:- Streamyx without WiFi

2. 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.


3. Fixed Wireless

↪ Uses radion transmission towers rather that satellites
↪ Not available in all areas.
↪ Expected to uese WiMAX
↪ Provied high-speed Internet connections using a dish-shaped antenna to communicate via radio signals.



4. Wi-Fi (Wireless Fidelity)

↳ Data is transmitted through radio waves.
↳ Public wireless networks
 ↴ Both free and fee-based are available
↴ Currently Wi-Fi for short range, but WiMAX may soon be an option.
↳ Provide high-speed Internet connections to compatible or properly equipped wireless computers and device.
↳ Example: Streamyx with WiFi

⇛WIFI HOTSPOT - Places that provide a user with a free or paid Internet services. Eg: Airpot, Cafe, Hotel, Offices and othero public buildings.


5. Satellite Internet Service

↣ Broadband option for rural areas.
  • More expensive than cable or DSL.
  • Available in many areas other broadband options are not.
↣ Provides high-speed Internet connections via satellite
↣ A satellite dish communicates with a satellite modem.


6. Fiber to the Premises (FTTP)

↬ Also known as Broadband over Fiber (BoF)
↬ Delivers over fiber-optic cabling all the way the building.
  • Available in limited areas
  • Fast but expensive
↬ Uses fiber-optic cable
↬ Provide high-speed Internet access to house and business users.


7. 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.


ADVANTAGES AND DISADVANTAGES OF BROADBAND

ADVANTAGES
DISADVANTAGES
Connection speed is up to 100 times faster than dial-up connection. Online gaming is only possible using  a broadband internet access.
High monthly fee compared to dialup internet access
It does not affecr the phone line. For DSL  internet access, you can use the same phone line for btoh voice/ fax and data transmission.
Higher security risk than dial up connection . A personal firewall is needed to protect your computer
It is convenient because the internet connection is always on.
Not all phone wires are equipped for DSL service. May no be available in rural remote areas.
You don’t need to dial an access number and risk getting a busy signal.
Not all cable TV networks are equipped for cable internet access. May not be available in rural remote
Broadband internet offers unlimited access and you won’t be charged based on the connection duration.

Broadband internet not only gives you high speed internet acces, it can also  provide cheap phone services via VoIP technology






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