(ADSL is a high-speed broadband Internet access method running on the original telephone line. It has the advantages of saving investment, fast Internet access, and simple installation. Nowadays, many local area networks, especially Internet cafes, use this method. So can the speed of this method of Internet access reach the speed claimed by the ISP service provider? How can we further improve the Internet speed? How to distinguish whether ADSL is normal for office? How to find and manage the shortcomings of the Internet? under)
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