a message is transmitted from one computer to another using layers? In a network of computers each computer connected must have a unique IP address. IP: 1.2.3.4 IP: 5.6.7.8 When a message is sent from one computer to another‚ it travels down the protocol layers of the model‚ and then up the layers of the stack on the other computer. The application layer is the application software used by the network user. The Transport Layer guarantees that the receiver gets the data exactly as it was
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1 What are two reasons for physical layer protocols to use frame encoding techniques? (Choose two.) to identify where the frame starts and ends* to distinguish data bits from control bits* to reduce the number of collisions on the media to increase the media throughput to provide better media error correction 2 Which statement is correct about multimode fiber? Multimode fiber commonly uses a laser as a light source. Multimode fiber cables carry signals from multiple connected sending
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Ch1 1 - A(n) _________ is a LAN that uses the same technologies as the Internet but is open to only those inside the organization. a. Intranet b. I-net c. Local Area Network d. Extranet Answer: A‚ page 7 2 - A backbone network is: a. a high speed central network that connects other networks in a distance from hundreds of feet to several miles. b. a group of personal computers or terminals located in the same general area and connected by a common cable so they can exchange information. c. a network
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Accounting Information System II Chapter 12 – Electronic Commerce Systems REVIEW QUESTIONS 1. What is a VPN? * A VPN (virtual private network) is a private network that exists within a public network. 2. Name the 3 types of addresses used on the internet. * The Internet uses three types of addresses for communications: * (1) email addresses‚ * (2) Web site (URL) addresses‚ and * (3) the addresses of individual computers attached to network (IP address). 3
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http://www.example.com/page2 http 10. The internet core comprises of Many separate networks‚ some small some large 11. What is designed to specifically manage computer peripheral devices Device driver 12. Why is the TCP/IP model divided into layers To make it easier to understand how networks work‚ write protocols for networks‚ and to create standards for networks 13. Why is the TCP/IP considered an "open" network model It is not owned by any specific organization and shares details of how
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three levels – Application level – Computer level – Communication channel Protocol – Set of rules for communications – OSI Standard 10-2 OSI Reference Model Layer 7 6 5 4 3 2 1 Name Application Layer Presentation Layer Session Layer Transport Layer Network Layer Data Link Layer Physical Layer Purpose Application-to-application communication Manage data representation conversions Establish and maintain communication channel Guarantee end-to-end integrity of
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Telnet) and e-mail. Once the Application level has been completed‚ control is passed to the sixth level‚ or Presentation level. What occurs at this level involves transforming the data into a form that the application layer can accept. Encrypted data is handled at this level. This layer formats and encrypts data to be sent across a network. Sometimes this level is known as the syntax level. Control is then passed
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Abstract In order to experiment with distinct components of a mixture‚ they must be first separated so they can be observed individually. This is accomplished in this lab by the technique called thin layer chromatography (TLC). TLC involves a stationary phase‚ which the TLC plates as well as a mobile phase‚ which could be one of two solvents used: ethanol-acetone for TLC. Dyes in a sample separate consequently because of their unique polarities. As a result‚ nonpolar substances travel further
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Experiment 9 Thin Layer Chromatography Experiment: 9 Title: Thin Layer Chromatography Introduction: Chemical analysis is conducted on specific analytes (specific substance of interest in a mixture)‚ however it is often found that these analytes must be separated for the chemical analysis to conduct their analysis. Chromatography is a set up of laboratory a technique that is used to separate a chemical mixture. This technique is very useful as it allows us to follow the course of
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References: Cloud Computing. (2012‚ Nov). Retrieved from http://www.cisco.com Principles of IT Seurity. (2012‚ Nov). Retrieved from http://www.blink‚ucsd.edu Secure Socket Layer. (2012‚ Nov). Retrieved from http://www.searchsecuritytechtarget.com Wallace‚ K. A. (2005‚ June). Internet Security Problems Can Be Prevented. Retrieved from http://www.ezinearticles.com
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