User:Itpastorn/dko/ccna1-3.1-1

Introduction to Networking

Overview CCNA 1 - Module 1 (3.1) In this module one only needs cursory knowledge. In-depth knowledge is saved for later.
 * 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

Requirements for Internet connection
"A protocol is a formal description of a set of rules and conventions that govern how devices on a network communicate."
 * Physical connection
 * Logical connection
 * Applications.

PC Basics

 * Transistor
 * Integrated circuit
 * Resistor
 * Capacitor
 * Connector (Swedish: "kontakt")
 * Light emitting diode (LED)
 * Printed circuit board (PCB) (Swedish: "Kretskort"
 * CD-ROM, DVD, Blueray, (HD-DVD)
 * Central processing unit (CPU)
 * Floppy disk drive
 * Hard disk drive
 * Microprocessor – "purpose-designed silicon chip" - "Very Large-Scale Integration (VLSI)" - "A microprocessor contains a CPU"
 * Motherboard
 * Bus (computing)
 * Random-access memory (RAM)
 * Read-only memory (ROM)
 * System unit
 * Expansion slot
 * Power supply

Backplane components:


 * Backplane
 * Network interface card (NIC)
 * Video card
 * Audio card
 * Parallel port
 * Serial port
 * Mouse port
 * USB
 * Firewire

Network interface card
"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

 * Built-in
 * Expansion slot
 * PC Card, PCMCIA
 * USB

Overview of high-speed and dial-up connectivity
Broadband Internet access
 * The 1969s: 300 bps modems to connect dumb terminals to mainframe computers
 * The 1970s: Bulletin Board Systems appear
 * The 1980s: BBS's become popular. 9600 bps. Fax-modems are introduced. Fidonet.
 * The 1990s: Modems reach 56 kbps. ISDN and DSL, Cable modems are introduced.

TCP/IP description and configuration
"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

 * Ping 127.0.0.1
 * Ping IP address of host computer
 * Ping default-gateway IP address
 * Ping remote destination IP address
 * Broadcast ping
 * tracert/traceroute

Web browser and plug-ins
Popular plug-ins
 * Netscape Navigator
 * Internet Explorer
 * Opera
 * Firefox and SeaMonkey, from Mozilla Foundation, based on the Gecko layout engine
 * Konqueror, based on KHTML (might switch in the future to Webkit)
 * Safari (web browser), based on Webkit (a fork of KHTML)
 * Adobe Flash (Adobe has bought Macromedia)
 * Quicktime
 * Real Player
 * Java (programming language)

Troubleshooting Internet connection problems
(Lab)

Binary presentation of data
In Swedish: Teckenkodning på webben (screencast)
 * ASCII

Bits and bytes
Prefixes Units
 * kilo-, kibi-
 * mega-, mebi-
 * giga-, gibi-
 * tera-, tebi-
 * 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)

Boolean or binary logic

 * Logic gates
 * Not
 * And
 * Or

IP addresses and network masks
Network address vz. host address

Additional resorces (besides Wikipedia)

 * What is a Network Interface Card at Learn Networking
 * What is a modem at Learn Networking
 * A Guide To Network Math at Learn Networking
 * Module 1 exam solutions at Learn Networking

Navigation

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