High-speed dial-up works through acceleration servers, file compression, filtering, and caching. Acceleration servers can reduce handshake processes by 50% to prevent data loss. File compression uses lossless compression for text and lossy compression for photos and graphics. Lossless compression ensures the compressed data matches the original while lossy compression does not. Filtering blocks pop-up ads through a bundled pop-up blocker. Caching allows browsers to check for duplicate pictures and text from previously loaded pages, avoiding redownloading unchanged items to accelerate loading.

1. How High-Speed Dial-Up Works
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Acceleration Servers
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File Compression
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Lossless Compression and Lossy Compression
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Filtering
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Caching

2. Acceleration Servers
Since data may be lost if data is transmitted when
a receiving side is not in a receiving state when
apparatus transmits and receives data, it is important
to check a mutual state in communication. A
handshake is the function to secure communicative
reliability.
A handshake can be reduced a maximum of 50% by
skipping the conventional handshake process.

3. File Compression
The important element of the high-speed dial-up
Internet is compression of a file. Two kinds of
compression methods of a file are dressed, and are.
Other files which need to be completely maintained
as it is in process of a text and compression use
lossless compression. A photograph and graphics
use lossy compression. And the compressed file is
transmitted.

4. Lossless Compression
and Lossy Compression
●
Lossless Compression
The data compression method that the data
before compression and the data which passed
through processing of compression and
deployment become equal completely .
●
Lossy Compression
It is a thing of the data compression method
whose data before compression and data which
passed through compression and deployment
does not correspond completely.

5. Filtering
The high-speed dial-up provider has bundled the
pop-up blocker with the member at transmitting
software. This pop-up blocker is programmed to
recognize these code lines that spell an advertising
parameter. The demand of the advertisement
displayed to be recognized is refused. The
information transmitted to a machine through a
telephone line decreases, and it is accelerated.

6. Caching
A browser needs to load with all the pictures as
which it is displayed at the time of the first time
load of a Web page. When a browser saves a picture
and a text, as for it, the 2nd time loads the same
page that can check duplication. When the picture
has not been changed, it is not necessary to
download again.
People wishes to reuse it in the future, and it saves a
file.

7. Caching
A browser needs to load with all the pictures as
which it is displayed at the time of the first time
load of a Web page. When a browser saves a picture
and a text, as for it, the 2nd time loads the same
page that can check duplication. When the picture
has not been changed, it is not necessary to
download again.
People wishes to reuse it in the future, and it saves a
file.