A layer of the Open Systems Interconnection (OSI) model that frames upper-layer data and controls how data is placed on a medium | c. Media | b. A device on a network | d. Network | e. The physical means used to carry data signals | e. Data Link | c. The protocol data unit (PDU) used in Layer 2 of the OSI model | Concept Questions 1. What are the two main jobs of the data link layer? * Allows the upper layers to access the media using techniques such as framing. * Controls how data is
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BN’s‚ MAN’s and WAN’s and can range in size and distance from several hundreds of feet to miles and can have data transmission speed ranging from 100 – 1000 Mbps. (LANs) local area networks are a cluster of computer that are contained in a confined area examples: office floor‚ building‚ or multiple buildings. All connected computers on the LAN use shared circuits and LAN’s use high speed data transmission operation at 100Mbps .LAN’s can be standalone networks or are the basis for MAN’s WAN’s‚ and BN’s
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2012 A Survey of Intrusion Detection Systems for Wireless Sensor Networks Report This is the paper review of the paper “A survey of Intrusion detection systems in WSNs by Ashfaq Hussain Farooqi and Farrukh Aslam Khan”. This report is being submitted to Madam. Dr. Mehreen Afzal in the course “Advanced Cryptography and Cryptanalysis” by “Iftikhar Zafar” Center For Advance Studies In Engineering‚ CASE‚ Islamabad‚ Pakistan 12/22/2012 2 ABSTRACT: Wireless sensor networks (WSNs) are in
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using layers. The message is first created at the application layer using a software application. This software translates the message based on the protocol being used to transfer the message and places the necessary information along with the message into a Protocol Data Unit (PDU) which is also known as a ‘packet’. This packet is then passed on to the Transport Layer. The transport layer‚ using its own Transmission Control Protocol‚ or TCP‚ takes the packet from the application layer and places
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transmitted. Data communications is a subset of telecommunications. Data can include or convey graphic images‚ sound‚ or video files. The physical layers of the OSI and TCP/IP models are very similar. The data communications phase associated with digitization is the first phase. The portion of an IP address from which bits are borrowed when sub netting is the host. The transport layer ultimately passes data up to the application layer. A MAC address is associated with the Data Link Layer. An IP
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to the applications. 6) Presentation: Converts the information. 5) Session: Handles problems which are not communication issues. 4) Transport: Provides end to end communication control. 3) Network: Routes the information in the network. 2) Data Link: Provides error control between adjacent nodes. 1) Physical: Connects the entity to the transmission media. In simple terms‚ the OSI model defines a networking framework for implementing protocols. Is defines seven levels to accomplish this
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create standards that apply to multiple countries. 5. Which of the following are true about the commonly used version of the TCP/IP model as shown in this chapter? (Choose two answers.) C) The physical layer sits just below the data link layer. D). The network layer sits in the middle of the five layers. 6. The TCP/IP model refers to standards other than those the IETF defines in RFCs. Which of these standards groups is typically the source of external LAN standards? (Choose two answers.) A) ITU B)
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Installations: Operating system of network: Install file and print sharing: Negative aspects of the Internet: Network topology Dividing the transmitted bit stream into frames and determine which route the subnet to use. 2.4 OSI model and the 7 layer diagram. 1. Difference between OSI and TCP/IP Connection – oriented communication and connection less communication Benefit of network Network: Network is very popular common word now. It is a collection
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Chapter 1. The TCP/IP and OSI Networking Models Page 1 of 22 Chapter 1. The TCP/IP and OSI Networking Models This chapter covers the following exam topics: Operation of IP Data Networks Recognize the purpose and functions of various network devices such as Routers‚ Switches‚ Bridges and Hubs. Select the components required to meet a given network specification. Describe the purpose and basic operation of the protocols in the OSI and TCP/IP models. Welcome to the first chapter in your
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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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