Chapter 4: Network Access Introduction to Networks v5.1
4.0 Introduction 4.1 Physical Layer Protocols 4.2 Network Media 4.3 Data Link Layer Protocols 4.4 Media Access Control 4.5 Summary 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 2
Upon completion of this section, you should be able to: Identify device connectivity options. Describe the purpose and functions of the physical layer in the network. Describe basic principles of the physical layer standards. 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 3
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Home Router Connecting to the Wired LAN 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 5
Wired Connection Using an Ethernet NIC Connecting to the Wireless LAN with Range Extender 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 6
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Manchester Encoding Modulation 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 12
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Upon completion of this section, you should be able to: Identify the basic characteristics of copper cabling. Build a UTP cable used in Ethernet networks (scope does not include cabling area discussion). Describe fiber-optic cabling and its main advantages over other media. Connect devices using wired and wireless media. 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 16
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RJ-45 UTP Plugs RJ-45 UTP Socket 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 27
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UTP Testing Parameters: Wire map Cable length Signal loss due to attenuation Crosstalk 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 29
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Single Mode 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 33
Multimode 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 34
Fiber Optic Connectors 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 35
Common Fiber Patch Cords 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 36
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Upon completion of this section, you should be able to: Describe the purpose and function of the data link layer in preparing communication for transmission on specific media. 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 43
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Layer 2 Data Link Address 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 46
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Upon completion of this section, you should be able to: Compare the functions of logical topologies and physical topologies. Describe the basic characteristics of media access control methods on WAN topologies. Describe the basic characteristics of media access control methods on LAN topologies. Describe the characteristics and functions of the data link frame. 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 51
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Physical Topology 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 54
Logical Topology 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 55
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Half-Duplex Communication Full-Duplex Communication 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 63
Contention-Based Access 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 64
Controlled Access 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 65
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Frames have three basic parts: Header Data Trailer 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 70
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Examples of Layer 2 protocols: 802.11 Wireless Frame PPP Frame HDLC Frame Relay Ethernet Frame 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 75
Chapter Objectives: Explain how physical layer protocols and services support communications across data networks. Build a simple network using the appropriate media. Explain how the Data Link layer supports communications across data networks. Compare media access control techniques and logical topologies used in networks. 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 76
Thank you.