Basic Networking

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Basic Networking

• Nicholas Fugett

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What is networking?

• Networking is connecting devices together to
  commutate with each other, so they can share
  data, files, and computing resources
• Networking happens all around us to our PCs, to
  ATMs, cell phones, and much more
• We will focus on computer networking in this
  presentation

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Types of Networks

• LAN Local Area Network
• WAN- Wide Area Network

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Type of Network Topologies

• Star
• Mesh

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Most Common Protocols

• IP Internet Protocol
• TCP Transfer Control Protocol

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What is an IP Address?

• Its a logical address
• It can be either static or dynamic
• Can always be changed
• IPv4 127.0.0.1
• IPv6 20010db885a3000000008a2e03707334

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What is a MAC address?

• MAC Media Access Control
• Its a physical address
• It cant be changed
• Its physically part of the hardware
• Example of MAC 00ABFF2F934A

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First Three Layers of OSI Model
LAYER 3
LAYER 2
LAYER 1
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Most Common Network Devices

• Hub (Layer 1)
• Switch (Layer 2)
• Router (Layer 3)
• Wireless Access Point (Layer 2 or 3)

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Hub

• Layer 1 Device
• Just broadcast the same data to all ports

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Switch

• Layer 2 Device
• Sends data based off MAC address to the correct
  device

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Router

• Layer 3 Device
• Sends data based off IP address to the correct
  device

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Wireless Access Point

• Layer 2 or 3 device
• Sends wireless signals for network connection
• Can function either as a router or a switch

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Types of Network Cable

• Most common used today is UTP Ethernet
• Straight Through - Used to connect different
  layer devices
• Crossover - Used to connect different layer
  devices

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Wireless Protocols

• Protocol A speeds up to 54 Mbps, almost
  obsolete now.
• Protocol B Speeds up to 11 Mbps, still used
  today.
• Protocol G 54 Mbps, backwards compatible with
  B, most common used today.
• Protocol N 248 Mbps, Backwards compatible with
  A ,B , and G, Newest and available.

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Wireless Security

• WEP Wired Equivalent Privacy
• WPA- Wi-Fi Protected Access
• WPA2- Wi-Fi Protected Access 2

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Any Questions?