OSI Data Link Layer. Network Fundamentals Chapter Cisco Systems, Inc. All rights reserved. Cisco Public 1
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1 OSI Data Link Layer Network Fundamentals Chapter 7 1
2 Objectives Explain the role of Data Link layer protocols in data transmission. Describe how the Data Link layer prepares data for transmission on network media. Describe the different types of media access control methods. Identify several common logical network topologies and describe how the logical topology determines the media access control method for that network. Explain the purpose of encapsulating packets into frames to facilitate media access. Describe the Layer 2 frame structure and identify generic fields. Explain the role of key frame header and trailer fields including addressing, QoS, type of protocol and Frame Check Sequence. 2
3 Data Link Layer Accessing the Media Describe the service the Data Link Layer provides as it prepares communication for transmission on specific media 3
4 Data Link Layer Accessing the Media Describe why Data Link layer protocols are required to control media access 4
5 Data Link Layer Accessing the Media Describe the role of framing in preparing a packet for transmission on a given media 5
6 Data Link Layer Accessing the Media Describe the role the Data Link layer plays in linking the software and hardware layers 6
7 Data Link Layer Accessing the Media Identify several sources for the protocols and standards used by the Data Link layer 7
8 Media Access Control Techniques Explain the necessity for controlling access to the media 8
9 Media Access Control Techniques Identify two media access control methods for shared media and the basic characteristics of each 9
10 Media Access Control Techniques Define Full Duplex and Half Duplex as it relates to Media Access Control for non-shared media 10
11 Media Access Control Techniques Describe the purpose of a logical topology and identify several common logical topologies 11
12 Media Access Control Techniques Contrast logical and physical topologies 12
13 Media Access Control Techniques Identify the characteristics of point-to-point topology and describe the implications for media access when using this topology 13
14 Media Access Control Techniques Identify the characteristics of multi-access topology and describe the implications for media access when using this topology 14
15 Media Access Control Techniques Identify the characteristics of ring topology and describe the implications for media access when using this topology 15
16 Media Access Control Addressing and Framing Data Describe the purpose of encapsulating packets into frames to facilitate the entry and exit of data on media 16
17 Media access control addressing and framing data Describe the role of the frame header in the Data Link layer and identify the fields commonly found in protocols specifying the header structure 17
18 Media access control addressing and framing data Describe the role of addressing in the Data Link layer and identify cases where addresses are needed and cases where addresses are not needed 18
19 Media access control addressing and framing data Describe the importance of the trailer in the Data Link layer and its implications for use on Ethernet, a "nonreliable" media 19
20 Summary 20
21 21
OSI Data Link Layer. Network Fundamentals Chapter 7. Version Cisco Systems, Inc. All rights reserved. Cisco Public 1
OSI Data Link Layer Network Fundamentals Chapter 7 Version 4.0 1 Objectives Explain the role of Data Link layer protocols in data transmission. Describe how the Data Link layer prepares data for transmission
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