Introduction to Computer Networking

Introduction to Computer Networking

1. 1.Defining a Network with User Applications

   • 1.1.An Informal General Definition of a Computer Network
     • 1.1.1. A Computer Network is the stuff that works together (and so on), and Computer networking is the process of the stuff working together (and so on).
   • 1.2.Email
     • 1.2.2. Sending Email: Sender's Computer Perspective
       • 1.2.2.1. First, Applications store and process data (bits and bytes).
       • 1.2.2.2 Second, Email apps use some kind of character set to represent the text.
       • 1.2.2.3. Third, Email apps use email addresses.
       • 1.2.2.4. Finally, email apps work with other parts of the computing device to send the email.
     • 1.2.3. Sending Email: Networks Perspective
       • 1.2.3.1. To make the email process work, the network must include email servers
     • 1.2.1. Email (Electronic Mail), acts like sending letters through the postal service.
   • 1.3.Voice Telephone Calls
     • 1.3.1. A Voice call is a Telephone Call
     • 1.3.2. Early Analog Voice Calls
       • 1.3.2.1. Electrical Circuit
       • 1.3.2.2. Sound Waves
       • 1.3.2.3. Analogous Electrical Waves
     • 1.3.3.Digital Voice Calls
       • 1.3.3.1. Sound Waves
       • 1.3.3.2. Analog
       • 1.3.3.3. Digital
       • 1.3.3.4. Analog
       • 1.3.3.5. Sound Waves
     • 1.3.4. End-to-End Digital Voice with Business and Mobile Phones
   • 1.4. Recorded Video
     • 1.4.1 Digital Video Recordings
     • 1.4.2. Video Files
       • 1.4.2.1. A Video file is filled with video frames or a picture.
     • 1.4.3. Video Compression
       • 1.4.3.1. Video Compression is taking a video and storing it as a smaller video file.
   • 1.5. Refining the Definition of a Network
     • 1.5.1 The devices that the user uses work with other devices together to send bits.

2. 2.A Deeper Look at One Application: World Wide Web

   • 2.1. The World Wide Web (WWW or simply the Web ) particularly web browser software with which users access the web.
   • 2.2. Web Browsers (Web Clients)
     • 2.2.2. Using Web Addesses (URLs)
       • 2.2.2.1. Web addresses identify the specific web page that the user wants to display.
     • 2.2.1. Components on the Client Computer
   • 2.3. Web Servers
     • 2.3.1. Web servers store information and data that the user wants to see, hear, collecting that information into web pages.
     • 2.3.2. Web Server Hardware and Software
     • 2.3.3. Web Sites, Pages, and Objects
       • 2.3.3.1. web page refers to a collection of content that web browsers display in a single browser window at one point in time.
   • 2.4. The Process to Get One Web Page
     • 2.4.1. A Protocol Primer
       • 2.4.1.1. A Protocol is a set of rules.
     • 2.4.3.Getting All the Files for a Web Page
     • 2.4.2. Using HTTP to Get the First File for a Web Page
       • 2.4.2.1. HTTP or Hypertext Transfer Protocol defines the rules by which a web browser can ask for a web server, and the rules a web server uses to send the web page back to the web browser.
   • 2.4.4. Refining the Definition of a Network

3. 3.Uncovering the Network Between the Application Endpoints

   • 3.1. Comparing Computer Networks to Road Systmes
     • 3.1.1. Creating a Road (Link) Between Two Places ( Devices)
     • 3.1.2. Sharing Roads (Links) Between Towns (Sites)
     • 3.1.3. Networking Topologies with Links and Nodes
       • 3.1.3.1. Link refers to any cable between two devices.
       • 3.1.3.2. Node refers to any device.
   • 3.2. Small Lab Networks
   • 3.3. Home Networks
   • 3.4. SMB and Enterprise Networks
   • 3.5. The Internet. The internet is simply interconnected networks.
   • 3.6. Refining the Definition of a Network One More Time.
     • 3.6.1. Computer networking is a world with many components, both small and large, and the challenge and joy of working with networking is to discover how all the peices fit and worlk together.