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© 2007 Cisco Systems, Inc. All rights reserved.Cisco Public 1 DATA LINK LAYER AND PHYSICAL LAYER Derived From CCNA Network Fundamentals – Chapter 7 and.

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Presentation on theme: "© 2007 Cisco Systems, Inc. All rights reserved.Cisco Public 1 DATA LINK LAYER AND PHYSICAL LAYER Derived From CCNA Network Fundamentals – Chapter 7 and."— Presentation transcript:

1 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public 1 DATA LINK LAYER AND PHYSICAL LAYER Derived From CCNA Network Fundamentals – Chapter 7 and 8 EN0129 PC AND NETWORK TECHNOLOGY I

2 2 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Data Link Layer – Accessing the Media  The service the Data Link Layer provides as it prepares communication for transmission on specific media

3 3 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Data Link Layer – Accessing the Media  Why Data Link layer protocols are required to control media access

4 4 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Data Link Layer – Accessing the Media  The role of framing in preparing a packet for transmission on a given media

5 5 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Data Link Layer – Accessing the Media  The role the Data Link layer plays in linking the software and hardware layers

6 6 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Data Link Layer – Accessing the Media  Sources for the protocols and standards used by the Data Link layer

7 7 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Media Access Control Techniques  The necessity for controlling access to the media

8 8 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Media Access Control Techniques  Two media access control methods for shared media and the basic characteristics of each

9 9 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Media Access Control Techniques  Full Duplex and Half Duplex as it relates to Media Access Control for non-shared media

10 10 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Media Access Control Techniques  The purpose of a logical topology and identify several common logical topologies

11 11 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Media Access Control Techniques  Logical and physical topologies

12 12 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Media Access Control Techniques  The characteristics of point-to-point topology and the implications for media access when using this topology

13 13 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Media Access Control Techniques  The characteristics of multi-access topology and the implications for media access when using this topology

14 14 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Media Access Control Techniques  The characteristics of ring topology and the implications for media access when using this topology

15 15 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Media Access Control Addressing and Framing Data  The purpose of encapsulating packets into frames to facilitate the entry and exit of data on media

16 16 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Media access control addressing and framing data  The role of the frame header in the Data Link layer and the fields commonly found in protocols specifying the header structure

17 17 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Media access control addressing and framing data  The role of addressing in the Data Link layer and cases where addresses are needed and cases where addresses are not needed

18 18 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Media access control addressing and framing data  The importance of the trailer in the Data Link layer and its implications for use on Ethernet, a "non-reliable" media

19 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public 19 OSI Physical Layer

20 20 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Physical Layer Protocols & Services  The purpose of the Physical layer in the network and the basic elements that enable this layer to fulfill its function

21 21 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Physical Layer Protocols & Services  The role of bits in representing a frame as it is transported across the local media.

22 22 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Physical Layer Protocols & Services  The role of signaling in the physical media.

23 23 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Physical Layer Protocols & Services  Who establishes and maintains standards for the Physical layers compared to those for the other layers of the network

24 24 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Physical Layer Protocols & Services  Hardware components associated with the Physical layer that are governed by standards

25 25 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Physical Layer Signaling and Encoding  Network communication at this layer consists of individual bits encoded onto the Physical layer;  and the basic encoding techniques.

26 26 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Physical Layer Signaling and Encoding  The role of encoding as it applies to the transmission of bits and the value of treating a collection of bits as a code.

27 27 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Physical Layer Signaling and Encoding  The terms bandwidth, throughput, and goodput

28 28 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Characteristics & Uses of Network Media  Media characteristics defined by Physical layer standards.

29 29 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Characteristics & Uses of Network Media  The impact interference has on throughput and the role of proper cabling in reducing interference

30 30 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Characteristics & Uses of Network Media  The basic characteristics of UTP cable

31 31 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Characteristics & Uses of Network Media  The basic characteristics of STP and Coaxial cable

32 32 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Characteristics & Uses of Network Media  Types of safety issues when working with copper cabling

33 33 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Characteristics & Uses of Network Media  Primary characteristics of fiber cabling and its main advantages over other media

34 34 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Characteristics & Uses of Network Media  The role of radio waves when using air as the media and the increased need for security in wireless communications

35 35 © 2007 Cisco Systems, Inc. All rights reserved.Cisco Public Characteristics & Uses of Network Media  The characteristics used to categorize connectors, some common uses for the same connectors, and the consequences for misapplying a connector in a given situation


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