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Introduction to Networking

Overview CCNA 1 - Module 1 (3.1)

  • Understand the physical connections needed for a computer to connect to the Internet
  • Recognize the components of a computer
  • Install and troubleshoot NICs and modems
  • Configure the set of Networking protocols needed for Internet connection
  • Use basic procedures to test an Internet connection
  • Demonstrate a basic ability to use Web browsers and plug-ins

In this module one only needs cursory knowledge. In-depth knowledge is saved for later.

Introduction to Networking

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Requirements for Internet connection

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  • Physical connection
  • Logical connection
  • Applications.

"A protocol is a formal description of a set of rules and conventions that govern how devices on a network communicate."

PC Basics

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Backplane components:

"The NIC uses an interrupt request (IRQ), an input/output (I/O) address, and upper memory space to work with the operating system."

Considerations:

  1. Protocols – Speed of Ethernet ( Token Ring, or FDDI )
  2. Types of media – Twisted-pair, coaxial, wireless, or fiber-optic
  3. Type of system bus – PCI, PCI Express (or ISA, EISA or MCA)

NIC and modem installation

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Overview of high-speed and dial-up connectivity

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Broadband Internet access

TCP/IP description and configuration

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"TCP/IP is a set of protocols or rules that have been developed to allow computers to share resources across a network."

Testing connectivity with ping

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Popular plug-ins

Troubleshooting Internet connection problems

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(Lab)

Network Math

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Binary presentation of data

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In Swedish: Teckenkodning på webben (screencast)

Prefixes

Units

  • Byte or octet
  • Nibble, 4 bits, can be represented by one hexadecimal character
  • Bit
  • Character (may be one or more bytes depending upon the Character encoding)

Base 10 number system

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Base 2 number system

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Converting decimal numbers to 8-bit binary numbers

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Converting 8-bit binary numbers to decimal numbers

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Four-octet dotted decimal representation of 32-bit binary numbers

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Boolean or binary logic

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IP addresses and network masks

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Network address vz. host address

Extra topics (in addition to CCNA)

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Additional resorces (besides Wikipedia)

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