Week 2 CheckPoint OSI Model Key Terms Table
Week 2 CheckPoint OSI Model Key Terms Table
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Date Created: 11/17/15
Axia College Material Appendix C OSI Model Key Terms Table Use the table to define the key terms related to the OSI Model Describe the functions of any hardware connectivity devices and tools listed IT 240 IT 240 Func on Term Definition if applicable Physical layer This is the first and lowest This is when the data is sent layer in the sevenlayer OSI on the network media by the model NIC Data link layer The Data link layer is This is layer two of the OSI responsible for model and resides above the communications between Physical Layer and below adjacent network nodes the Network Layer Network layer The Network Layer is layer The Network Layer is three of the OSI model and responsible for establishing resides above the Data Link paths for data transfer Layer and below the through the network Transport Layer Transport layer The Transport Layer is The Transport Layer layer four of the OSI model and resides above the Network Layer and below the Session Layer delivers messages between networked hosts and is responsible for fragmentation and reassembly Session layer This is the fifth layer of the OSI model and is above the Transport Layer and below the Presentation Layer This layer is responsible for establishing processto process communications between networked hosts Presentation layer This is layer six of the OSI model and is above the This layer is responsible for defining the syntax which two network hosts use to Session Layer and below communicate the Application Layer Application layer Layer seven of the OSI This layer provides end model and is above the Presentation Layer user services such as file transfers electronic messaging email and virtual terminal access Signaling This is a method of using electrical light energy or radio waves to communicate Synchronous Is a device that uses a timing clock signal to IT 240 coordinate communications between the two devices IT 240 Asynchronous Is a device that does not use timing signals or clocks but consists of a start signal and data bytes Bandwidth This is the amount of data that can be carried on a given transmission medium Pointtopoint topology Topology can be considered as a virtual shape or structure of a network Pointtopoint topology connects two nodes directly together Multipoint connection A connection with more than two end points Links more than two to three devices together MAC Media Access Control A unique identifier assigned address for communications on a network LLC Logical link control This manages the data link between two computers SAP SAP is an identifying label Opens internet connections for network endpoints Access method This is how a computer puts information on a network This is a function of a mainframe operating system that enables access to data CSMACD This is a computer This is used to improve accessing method CSMA performance by terminating transmission as soon as a collision is detected Gateway Hardware or software A gateway links two different types of networks by repackaging and converting data Hubs A multiported connection This is used to connect point network devices via a cable segment Bridges This is a device that A bridge is used to connect connects two LANs and makes them appear as one two segments of the same LAN Token passing A method that uses a continuously repeating frame that is transmitted onto the network by the controlling computer Token passing uses a special authorizing packet of information to inform devices that they can Transmit data IT 240 Polling Actively sampling the status of an external device IT 240
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