# 1 6/8/2016 CS 147- Computer Architecture Network Communication and YOU By Ali Farsio

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CS 147- Computer Architecture# 3 6/8/2016 What Is A Network Communication ? Process Of Transferring Information from destination to destination To Be able to Transfer data to almost any place in the world, there are many different methods used There are different protocols for different necessities needed

# 4 6/8/2016 Why Do We Care? We Care because most of use the internet several times a day We care because all of us want to be able to receive and send information quickly and efficiently Although most of us are not 100% sure what really goes on…

# 5 6/8/2016 Important Quote “That's how it is with people - nobody cares how it works as long as it works”

CS 147- Computer Architecture# 6 6/8/2016 Types Of Networks LAN WAN GAN

CS 147- Computer Architecture# 7 6/8/2016 Local Area Network This is a network covering a small geographic area, like a home, office, or building. Current LANs are most likely to be based on Ethernet technology

CS 147- Computer Architecture# 8 6/8/2016 Wide Area Network WANs are used to connect LANs and other types of networks together, so that users and computers in one location can communicate with users and computers in other locations. One Common Example is the Internet

CS 147- Computer Architecture# 9 6/8/2016 Global Area Network System Will Soon cover All parts of the world by Satellites Although only at speeds of 492kb/s The “New” type of network

CS 147- Computer Architecture# 10 6/8/2016 ISO International Standards Organization (ISO) was first developed in 1984 and is recognized by over 130 countries Some style of the OSI Model Is Used in Practically All Networks

CS 147- Computer Architecture# 11 6/8/2016 ISO and OSI International Standards Organization (ISO) have made a model, Open system Interconnection (OSI) model to standardize communications This Model Is Divided into 7 layers : Application, Presentation, Session, Transport, Network, Data-Link, and Physical Layers

CS 147- Computer Architecture# 12 6/8/2016 The Model

CS 147- Computer Architecture# 13 6/8/2016 The Model

CS 147- Computer Architecture# 14 6/8/2016 Layer 7 - Application This layer supports application and end- user processes Application Specific Some Examples are , Telnet, File Transfers

CS 147- Computer Architecture# 15 6/8/2016 Layer 6 - Presentation This layer encrypts data to be able to be read by different networks This layer formats and encrypts data to be sent across a network, providing freedom from compatibility problems

CS 147- Computer Architecture# 16 6/8/2016 Layer 5 -Session This layer establishes, manages and terminates connections between applications It deals with session and connection coordination

CS 147- Computer Architecture# 17 6/8/2016 Layer 4 -Transport This layer provides transparent transfer of data between end systems, or hosts It ensures complete data transfer.

CS 147- Computer Architecture# 18 6/8/2016 Layer 3 - Network This layer provides switching and routing technologies Routing and forwarding are functions of this layer, as well as addressing, internetworking, error handling, congestion control and packet sequencing

CS 147- Computer Architecture# 19 6/8/2016 Layer 2 - Data Link This is the level of the actual hardware. It defines the physical characteristics of the network such as connections, voltage levels and timing. Where To Send As Radio Wave, Light etc…

CS 147- Computer Architecture# 20 6/8/2016 Layer 1 -Physical Data packets are encoded and decoded into bits (Why We Studied Hamming Code!!!) Routing and forwarding are functions of this layer, as well as addressing, internetworking, error handling, congestion control and packet sequencing

CS 147- Computer Architecture# 21 6/8/2016 Please Do Not Throw Sausage Pizza Away

CS 147- Computer Architecture# 22 6/8/2016 Thank You For Watching…