Table of Contents EXECUTIVE SUMMARY 4 INTRODUCTION 5 DATA COMMUNICATIONS – THE OSI MODEL 6 MEDIA LAYERS 7 HOST LAYERS 7 DEFENSE IN-DEPTH 8 FIREWALLS 8 NETWORK INTRUSION DETECTION/PREVENTION SYSTEMS (IDPS) 8 Signature Updates 9 User-defined Custom Signatures 10 HOST-BASED INTRUSION DETECTION SYSTEMS 10 ANTIVIRUS 11 SUMMARY 11 REFERENCES 12 Executive Summary Modern distributed data communication systems are comprised of hardware and software that facilitate the creation‚ manipulation
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NetHistory (August 2011) http://www.nethistory.info/History%20of%20the%20Internet/protocols.html 2. “History of the Internet” Wikipedia.org (August 2011) http://en.wikipedia.org/wiki/History_of_the_Internet 3. “ARPANET” Wikipedia.org (August 2011) http://en.wikipedia.org/wiki/ARPANET 4. Cerf‚ Vinton. Dalal‚ Yogen. Sunshine‚ Carl. “RFC 675 SPECIFICATION OF INTERNET TRANSMISSION CONTROL PROGRAM” (December 1974) http://tools.ietf.org/html/rfc675 5. “Internet Protocol” Wikipedia.org (August
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teaches at MIT. He’s also head of the World Wide Web Consortium‚ an organization based at the university that sets technical standards for the Web. ■ Before there was the Internet‚ there was the Arpanet‚ which mostly connected universities. And the guy who developed the first e-mail application for the Arpanet‚ enabling a user on one computer to communicate with someone on a distant computer‚ was Ray Tomlinson. Tomlinson chose the “@’’ sign to separate the user’s name from the name of the computer
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Open Souce an Expository Essay Bahiyyudin Ansari Com/150 07/18/2010 Karen Walsh Open Souce an Expository Essay Open source programming brings many benefits to the computer industry by lowering cost‚ allowing the user to gain better accessibility‚ and providing long-term use. Without open source users would not have many advantages of making changes to improve software. Organizations that use open source can excel within their own industries by using tools tailored to fit their business
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"Beam me up‚ Scottie." This popular line from Star Trek was a demonstration of the advanced technology of the future. Though it was a fictional story‚ Star Trek became the universal vision of the future. As always reality tends to mimic fiction. Though our society has not quite resulted to living in space‚ we have made life easier with technology. Economic survival has become more dependent upon information and communications bringing forth new technology of which was never thought possible. Just
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age of information technology owes everything to the development of computer networking. The first operational computer network was created for the United States Department of Defense and was known as ’Advanced Research Projects Agency Network’ (ARPANET). Since then‚ networking technology and architecture evolved in complexity and sophistication‚ to provide us with the internet. As internet is open to all‚ In order to make document sharing within organizations more secure‚ an intranet is created
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A Brief History of Computer Nikita Rechal1 and Sooriyan Aliyoglu2 1Department of Computer Engineering‚ Castle University‚ New City‚ Cyprus a.orther@xx.yy.zz 2MediDeniz Software‚ Old Street‚ New York‚ USA a.etherwen@zzz.com Abstract Computers have wedged themselves into every facet of our lives—they are what we would use as the symbolic representation of the modern world. But did you know that the history of computers dates back to the 1800s?Indeed‚ the history and evolution of computers is
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computer security? A: Protection of physical locations‚ hardware and software of computers from outside threats. Q: Name three primary threats to security of computers. A: Physical theft‚ espionage and sabotage. Q: Name two fundamental problems with ARPANET security? A: (1) No safety for dial-up connections. (2) Nonexistent user identification and authorization. Q: What was the name of the now obsolete operating system designed for security objectives? A: MULTICS Q: What is the security that addresses
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dividing information into packets and switching them from computer to computer began in the 1960s. The U.S. Department of Defense Advanced Research Projects Agency (ARPA) funded a research project that created a packet switching network known as the ARPANET. ARPA also funded research projects that produced two satellite networks. In the 1970s ARPA was faced with a dilemma: Each of its networks had advantages for some situations‚ but each network was incompatible with the others. ARPA focused research
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mankind and its role on communication. After the invention of computer in 1950‚ world got familiar with the concept of internet. Professor Kleinrock demonstrated sending of messages from University of California to Stanford Research Institute by using ARPANet (Advanced Research Project Agency Network). Advanced Research Project Agency (ARPA) developed and supported research projects in 1970 whose focus was on communication. In 1973 Robert Elliot ’Bob’ Kahn with Vint Cerf invented TCP (Transmission Control
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