CS3510Lecture2

CS3510Lecture2 - CS 3510 Computer and Networking Architecture Dr Clincy Dr Garrido not able to do 2nd half Why Resigning due to personal business

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Dr. Clincy Lecture Slide 1 CS 3510 Computer and Networking Architecture Dr. Clincy Dr. Garrido not able to do 2 nd half Why ? Resigning due to personal business demand
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Dr. Clincy Lecture Slide 2 Final Office-Hours and Dissemination Determined
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Dr. Clincy Lecture Slide 3 Online (17%) In-class (87%)
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Dr. Clincy Lecture Slide 4 OSI Open Systems Interconnection Developed by ISO (International Organization for Standardization) Contains seven layers Application Presentation Session Transport Network Data Link Physical
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Dr. Clincy Lecture Slide 5 OSI Reference Model ? Bottom 3 layers Bottom 3 layers responsible for getting letter to destination (Bottom 3 layers): at the lower levels of the model protocols define the electrical and physical standards (Bottom 3 layers) at the lower levels, the bit ordering, the transmission of the bits, and error detecting and correcting are defined Top 4 layers at the higher levels of the model, the protocols define the data formatting, message syntax, dialogue management, message sequences and info presentation
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Dr. Clincy Lecture Slide 6 OSI Physical Layer Responsible for transmission of bits Always implemented through hardware Encompasses mechanical, electrical, and functional interfaces Encoding and Decoding issues: how 0’s and 1’s are converted to signals Signal translation (ie. electrical to optical) Signal Multiplexing and Demultiplexing Signal Modulation and Demodulation Transport medium: Coaxial, Twisted Pair, Optical, etc. . Transmission Rate/Data Rate – how fast to send bits Transmission mode: transmission direction (simplex, duplex) Physical Topology: network layout
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Dr. Clincy Lecture Slide 7 OSI Data Link Layer Responsible for error-free, reliable transmission of data Framing, Flow control, Error control (detection/correction), Access Methods Makes use of physical address because with in the same network Network Layer Data Link Layer Physical Layer Actually sends the packets (groups of frames) from node to node using a routing algorithm Takes raw data (bits) and transform them into frames, error control, etc. Transmit and receive the raw data (bits)
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Dr. Clincy Lecture Slide 8 OSI Network Layer Responsible for routing of messages through networks Concerned with type of switching used (circuit v. packet) Handles routing among different networks NOTE: with in the same network, only the DATA LINK layer is needed – amongst multiple networks, the NETWORK LAYER is needed No need for routing with in the same network (LAN) Routing across “internetworks Makes use of logical address vs physical address because not with in same network
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Dr. Clincy Lecture Slide 9 OSI Network Layer High Level View of Network Layer’s Functions: 1. Transmitting data packets through a network in a timely manner 2. There are more than one route between
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This note was uploaded on 06/17/2011 for the course COMP 2302 taught by Professor Staff during the Spring '11 term at Kennesaw.

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CS3510Lecture2 - CS 3510 Computer and Networking Architecture Dr Clincy Dr Garrido not able to do 2nd half Why Resigning due to personal business

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