Chapter 7 Study Guide

Chapter 7 Study Guide - SEMESTER 1 Chapter 7 Data Link...

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SEMESTER 1 Chapter 7 Data Link Layer V 4.0 7.1.1 What are the 2 basic services the Data Link layer provides? Allows the upper layers to access the media using techniques such as framing Controls how data is placed onto the media and is received from the media using techniques such as media access control and error detection List and define the 4 specific terms associated with the Data Link layer? Frame - The Data Link layer PDU Node - The Layer 2 notation for network devices connected to a common medium Media/medium (physical)* - The physical means for the transfer of information between two nodes Network (physical)** - Two or more nodes connected to a common medium 7.1.1. 2 What happens the frame as moves from source to destination? At each hop along the path, an intermediary device - usually a router - accepts frames from a medium, decapsulates the frame, and then forwards the packet in a new frame appropriate to the medium of that segment of the physical network. 7.1.2 Define Media Access Control. The media access control methods described by the Data Link layer protocols define the processes by which network devices can access the network media and transmit frames in diverse network environments. 7.1.3 What can the control information tell you? Which nodes are in communication with each other When communication between individual nodes begins and when it ends Which errors occurred while the nodes communicated Which nodes will communicate next List and define the three elements of a Data Link Layer Frame. Data - The packet from the Network layer Header - Contains control information, such as addressing, and is located at the beginning of the PDU Trailer - Contains control information added to the end of the PDU 7.1.3. 2 List and define the 5 typical field types. Start and stop indicator fields - The beginning and end limits of the frame Naming or addressing fields Type field - The type of PDU contained in the
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frame Control - Flow control services A data field -The frame payload (Network layer packet) 7.1.4 What is the most common physical device that is used for the Data Link Layer? Ethernet network interface card (NIC) 7.1.4. 2 Describe the two sublayers of the Data Link Layer.
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This note was uploaded on 03/06/2011 for the course BUSN 115 taught by Professor Jack during the Winter '10 term at DeVry Arlington.

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Chapter 7 Study Guide - SEMESTER 1 Chapter 7 Data Link...

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