Change Dial-up connecting

If we feel internet speed is slow, it may depend on Dial-up connecting.Dial-up’s speed is restricted by the bandwidth of phone.Now, almost connecting uses another connecting method with Dial-up - broadband connecting. But it needs a lot of time.There is a new technology “Hight speed Dial-up”.

Handshake of high speed Dial-up.

When we start communication, both of sender and receiver have to do handshake.Standard connecting is doing too many communication. So, high speed Dial-up cuts some communication and handshake become shorter.This way, we can cut 50% handshake maximum. And taking time that sender connect with receiver become 1 of 1~9.

About compression technology

One of important element of high speed Dial-up is file compression.If we do file compression, communication speed becomes faster.Two types file compression are used now.One of them is lossy compression. This way cut unwanted information. So, we can’t return before condition.Another one is lossless compression. This way can return before condition.

How Filtering works

When we see web page, we may see some advertisements.Step of getting these advertisements data contains whole communication steps. So, advertisements make communication to slow.High speed Dial-up provider cuts advertisements data automatically. As a result, we can see some web page more quickly than before.

How Caching works

When we see web page that we have ever been, then communication is unwanted.Provider cuts communication steps if we have ever been the page and it hasn’t changed.When get web page data, provider check them and compare with cache.Cache is data that is information of web pages which have ever been.By present page’s data compare with cache, we can know whether the page has changed.

Experiment of high speed

We don’t know how does high speed Dial-up become faster. So, experiment is done.This experiment used one of high speed Dial-up provider - NetZero. We measure communication both speed of standard and high speed.At last, we understand high speed Dial-up is three times faster than standard.