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Archive for the ‘Computer Network’ Category

Mạng máy tính

Password và địa chỉ mặc định của một số loại Modem

Posted by hqhuy on 12 June, 2009

Modem Planet 3100 : http://10.0.0.2
User: admin Pass: epicrouter

Modem Cnet DNAC804: http://10.0.0.2
User: admin Pass: epicrouter

Modem Zoom: http://10.0.0.2
User: admin Pass: zoomadsl

Modem Zyxel : http://192.168.1.1
User: admin Pass: 1234

Conexant x3/x4 : http://10.0.0.2
User: admin Pass: zoomadsl

Aztech DSL 305EU/305E http://10.0.0.2
User: admin Pass:

Modem Planet ADSL http://10.0.0.2
User : admin Pass : epicrouter

Huawei và SMARTLINK http://192.168.1.1
User : admin Pass: admin

Modem POSTEF http://192.168.1.1
User :postef Pass :postef

Speed Com++ http://10.0.0.2
User : admin Pass : conexant

Billion ADSL Router : http://192.168.1.254
User : admin Pass : password

Micronet ADSL Router : http://10.0.0.2
User : admin Pass : epicrouter

Prolink ADSL Rounter : http://10.0.0.2
User : admin Pass : password

Draytek ADSL Router http://192.168.1.1
User : none (để trống) Pass: none (để trống)

D-Link: http://192.168.1.1
User: admin Pass: admin

SIEMENS http://192.168.1.1
user:admin pass :admin

LinkPro http://192.168.1.1 Or http://10.0.0.2
user : admin pass : epicrouter

MotoFax http://10.0.0.2
User:Admin Pass:conexant

SpeedStream 5100 http://192.168.254.254
user : username Pass : password

TP-Link Router : http://10.0.0.2
User: admin pass: admin
User: root pass: root

TENDA http://192.168.1.1
User: root pass: root

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Thi môn mạng máy tính lớp ĐTYS 3

Posted by hqhuy on 14 March, 2009

Thi môn mạng máy tính lớp ĐTYS 3 dưới dạng trắc nghiệm. Các câu hỏi trắc nghiệm và các bài kiểm tra tự luyện tập tại địa chỉ
http://bme.hut.edu.vn/lms/course/view.php?id=46.

Account trong file đính kèm. Password mở file hỏi cán bộ lớp.

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The Invention of the Ethernet – Local Area Networks – Robert Metcalfe

Posted by hqhuy on 28 November, 2008

By Mary Bellis

I came to work one day at MIT and the computer had been stolen, so I called DEC to break the news to them that this $30,000 computer that they’d lent me was gone. They thought this was the greatest thing that ever happened, because it turns out that I had in my possession the first computer small enough to be stolen! – Robert Metcalfe on the trials and tribulations of inventing the Ethernet.

The ethernet is a system for connecting computers within a building using hardware running from machine to machine. It differs from the Internet, which connects remotely located computers by telephone line, software protocol and some hardware. Ethernet uses some software (borrowed from Internet Protocol), but the connecting hardware was the basis of the patent (#4,063,220) involving newly designed chips and wiring. The patent* describes ethernet as a “multipoint data communication system with collision detection”.

Robert Metcalfe was a member of the research staff for Xerox, at their Palo Alto Research Center (PARC) where some of the first personal computers were being made. Metcalfe was asked to build a networking system for PARC’s computers. Xerox’s motivation for the computer network was that they were also building the world’s first laser printer and wanted all of the PARC’s computers to be able to print with this printer.

Robert Metcalfe had two challenges: the network had to be fast enough to drive the very fast new laser printer; and it had to connect hundreds of computers within the same building. Never before had hundreds of computers been in the same building — at that time no one had more than one, two or maybe three computers in operation on any one premise.

The press has often stated that ethernet was invented on May 22, 1973, when Robert Metcalfe wrote a memo to his bosses stating the possibilities of ethernet’s potential, but Metcalfe claims ethernet was actually invented very gradually over a period of several years. In 1976, Robert Metcalfe and David Boggs (Metcalfe’s assistant) published a paper titled, “Ethernet: Distributed Packet-Switching For Local Computer Networks.”

Robert Metcalfe left Xerox in 1979 to promote the use of personal computers and local area networks (LANs). He successfully convinced Digital Equipment, Intel, and Xerox Corporations to work together to promote ethernet as a standard. Now an international computer industry standard, ethernet is the most widely installed LAN protocol.

* U.S. Patent #4,063,220 – Ethernet Patent
Multipoint data communication system with collision detection.

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