Exploration Chapter 7 Slides

Exploration Chapter 7 Slides - OSI data link layer CCNA...

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12 May 2009 S Ward Abingdon and Witney College CCNA Exploration Semester 1 1 OSI data link layer CCNA Exploration Semester 1 Chapter 7
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12 May 2009 S Ward Abingdon and Witney College CCNA Exploration Semester 1 2 OSI data link layer OSI model layer 2 TCP/IP model part of Network Access layer Application Presentation Session Transport Network Data link Physical Application Transport Internet Network Access TCP, UDP IP Ethernet, WAN technologies HTTP, FTP, TFTP, SMTP etc Segment Packet Frame Bits Data stream
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12 May 2009 S Ward Abingdon and Witney College CCNA Exploration Semester 1 3 Data link layer topics Data Link layer protocols Preparing data for transmission Media access control methods Logical network topologies Encapsulating packets into frames Layer 2 frame structure and header and trailer fields
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12 May 2009 S Ward Abingdon and Witney College CCNA Exploration Semester 1 4 Functions of data link layer Encapsulates packets by adding a frame header and trailer including appropriate addressing. Controls access to the transmission medium.
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12 May 2009 S Ward Abingdon and Witney College CCNA Exploration Semester 1 5 Hops There may be a different layer 2 protocol in use on each hop of a journey. Different media, different types of link, different bandwidths, LAN/WAN affect the choice of protocol.
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