This presentation include brief instruction about the different modes of connecting to the internet.

1. MODES OF CONNECTING
TO THE INTERNET
PRESENTED BY:-
•ASHOK
•AMLESH KUMAR
•ANIL DESHWAL

2. INTRODUCTION:-
INTERNET CONNECTIVITY IS A NECESSITY
Most people are familiar with the use of modems
and telephone lines to access the Internet, but
there are now many other options available, each
with their own advantages and drawbacks. In this
ppt, different types of Internet connections will be
introduced with their technical features, and
compared according to their pros and consrelated
to the criteria of speed, costs, availability, etc.

3. CONTENTS
 ANALOG MODEMS or DIAL UP MODEMS
 ISDN
 SATELLITE CONNECTION
 DSL
 CABLE MODEM
 WI-FI
 WLAN
 WIMAX

4. Analog or dial up modems
(1980s)
Since analog modems are built into most new computers, they
represent the most convenient method of connecting to the Internet for
the first time and are very familiar to most computer users.
“Modems”(amodulator/demodulator) convert analog data transmitted
over phone lines into digital data that computers can read
(demodulation) and also convert digital data into analog data so it can
be transmitted (modulation) –see the picture below--. Because they
use regular analog phone lines, these are called analog modems to
distinguish them from other sorts of modems.

7. KEY POINTS:-
 dial up modems access is really just like a phone connection
 Connection through modem and a public telephone network.
 It uses analog telephone lines
 Encoding & Decoding of analog signals is done by modem
 Using a dial-up line to transmit data is similar to using the
telephone to make a call
 Speed is only 56 kbps

8. PROCESS OF ANALOG MODEMS
1. The client computer modem gets ready to
send the data to the receiver.
2. Verification of user’s account by ISP
3. Connection is established and data can be
transmitted.
4. When either modem hangs up, the
communication ends.

9. ADVANTAGES
 Low cost i.e 10dollars per modem
 Safety
 Availability i.e able to get internet services almost anywhere in the country
 simplicity
DISADVANTAGES
 Low Speed i.e slowest type of connection available. i.e 56kbps
 Requires phone line.
 Unable to talk on the telephone when using internet.

11. ISDN (Integrated Services Digital Network) 1980s
ISDN uses fully digital signals over copper phone wire, a
standard telephone line. This means there is no
conversion from digital to analog and back again in the
manner that an analog modem works. Most ISDN lines
offered by telephone companies give users two lines at
once, called B channels. The users can use one line for
voice and the other for data, or they can use both lines
for data to give them data rates of 128 Kbps.

13. KEY POINTS:-
 Integrated Services Digital Network
 it was designed for end to end digital communication.
 It put together speech and information on the same line
 An ISDN line can provide two data channels each operating at
64kbps
 ISDN service is available where the distance from the client to
the exchange is under 55 km

14. ADVANTAGES
 Speedy establishment of connection
 Widely available in most metro areas.
 Able to talk on the telephone and surf the web simultaneously.
 It can be used for other activities like
◦ Video conferencing

15. Disadvantages
 It is very costly than the other typical telephone system
 Not dramatically faster than analog service
 Not available everywhere
 The access charge is usually per-minute.

16. SATELLITE CONNECTION

17. SATELLITE CONNECTION
 Internet access provided through satellites
 Data is being sent from the satellite to a user's equipment and then
translated and decoded.
 Delivered through satellite dish
 Equipment required-mini dish satellite receiver and satellite modem
 It is one of the high-speed option available today
 Upload speed-128 kbps
 Download speed-400 kbps
 Satellite internet providers has a FAP(Fair Access Policy)

20. HughesNet

21. ADVANTAGES
 High speed internet access
 Does not tie up with local phone service or cable TV
subscription
 Connection speed is not affected by phone or cable wiring
 Always on connection
 Available virtually everywhere in the regional serving area.

22. DISADVANTAGES
 More expensive than DSL and cable
 Large setup fee. Expensive equipment upfront. Has to be set
up by trained technician.
 Fair access policy limits the ability to download large files in
reasonable amount of time
 Weather problem. In severe snowstorms and heavy rain, users
may experience signal fade

23. DSL

24. DSL
 Digital Subscriber Line
 High-speed data service that works over POTS copper
telephone lines
 Uses a different part of the frequency spectrum than analog
voice signals
 DSL Internet speeds started out at 960 Kbps download & 120
Kbps upload.
 Price not much more than the price of dial up, but twice the
speed .

25. Two types of DSL
ADSL:-
 Type of DSL that provides different bandwidths in
the upstream and downstream directions
 It can support downstream bandwidths of up to 8
mbps and upstream bandwidths of 1.5 mbps
 Eg:- RADSL, VDSL.

26. SDSL:-
 Equal bandwidth for upstream and downstream
activities
 More popularly used in business
 It can offer 1.5 Mbps both for download and upload
 Egs:- HDSL and SHDSL

27. ADVANTAGES
 DSL simultaneously keeps your Internet connection and phone lines
open
 Downloads are faster than uploads
 DSL uses the existing wiring infrastructure of your telephone lines
 DSL is secure
 It is always on connection
 High speed
 Also able to use dial-up connections.

28. DISADVANTAGES
 DSL efficiency is related to distance
 Large amount of uploading is not possible
 DSL is limited to a certain perimeter
 No standardization
 Compared to dial up ,it is expensive
 Not available everywhere due to the signal limitations based on the
distance.
 Upstream speed limited of a common type-ADSL.

29. CABLE MODEM

30. CABLE MODEM
 Cable modems provide Internet access using the same
cables that transmit cable television
 Cable modems are primarily used to deliver broadband
internet access in the form of cable internet
 Cable modem connections are faster than dial-up and
DSL connections.
 Connection speed fluctuate depending on the number of
people using the service at the same time.

31. ADVANTAGES
 High connection speed
 Convenient
 Does not affect your phone line
 Connection speed is not affected by the distance from ISP
operation center
 Easy setup with self installation kit
 Always on connection.

32. DISADVANTAGES
 Higher price than dialup and DSL connection
 Higher security risk than dialup or DSL
 Not available to all cable TV networks
 Bandwidth is shared over the same cable line
 Connection speed is affected by the number of people using
the internet at the same time in your neighborhood
 Upstream speed limited.

34. WI-FI
 Wireless Fidelity
 Vic Hayes has been named as father of Wi-Fi
 Big internet buzz word & growing very rapidly
 Wi-Fi usually requires the ISP to invest quite a bit in
transceivers
 Practical range is about 90 meters (300 feet) from the
transceiver using normal powered transmitters
 At least 7 or more end users can be sharing the same master
transceiver & still each be able to get up to 1544 Kbps.

35. ADVANTAGES
 Flexible working
 Reduced set up cost
 Avoid deterioration with time
 Eliminate re-configuring computers
 Password and security
DISADVANTAGES
 Signal strength sensitivity
 Climatic conditions

36. WLAN
 Wireless Local Area Network
 Provide wireless network communication over short
distances
 Uses radio or infrared signals instead of traditional
network cabling
 Built by attaching a device called the access point
 IEEE 802.11 is the foremost standard for wireless
LANs

37. WIMX

38. WiMax
 Worldwide Interoperability of Microwave Access
 Broadband wireless access technique
 Offers fast broadband connections over long distance
 Ranges of up to 30 miles
 Improves non-line-of-sight performance
 Great advantage to rural communities where cable & DSL
wasn't available & to developing nations

39. ADVANTAGES
 Wimax coverage
 Wimax high speed
 Multi-functionality within Wimax Technology
DISADVANTAGES
 Lack of quality
 Wimax range
 Wimax bandwidth
 High cost