1. Introduction to Networks v5.1 Chapter 4: Network Access

2. © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 2 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

3. © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 3 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.

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5. Cisco Public 5 Home Router Connecting to the Wired LAN

6. © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 6 Connecting to the Wireless LAN with Range Extender Wired Connection Using an Ethernet NIC

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12. © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 12 Manchester Encoding Modulation

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16. © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 16 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.

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27. © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 27 RJ-45 UTP Plugs RJ-45 UTP Socket

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29. © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 29 UTP Testing Parameters: Wire map Cable length Signal loss due to attenuation Crosstalk

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33. © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 33 Single Mode

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43. © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 43 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.

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46. © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 46 Layer 2 Data Link Address

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51. © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 51 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.

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54. © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 54 Physical Topology

55. © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 55 Logical Topology

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63. © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 63 Half-Duplex Communication Full-Duplex Communication

64. © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 64 Contention-Based Access

65. © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 65 Controlled Access

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70. © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 70 Frames have three basic parts: Header Data Trailer

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75. © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 75 Examples of Layer 2 protocols: 802.11 Wireless Frame PPP Frame HDLC Frame Relay Ethernet Frame

76. © 2013 Cisco and/or its affiliates. All rights reserved. Cisco Public 76 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.

77. Thank you.