Wireless Networks Devices

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Description
Virtual Practice Lab
Practice Test
Wireless Networks Devices

Wireless Access Point (WAP)

  • Networking hardware device
  • Connects mobile devices to the wired infrastructure
  • Has ethernet interfaces RJ45 and antennae
  • Layer 2 device works in physical and data-link layers
  • Coverage area depends on the antennae
  • Many known vendors manufactures WAP
  • May contain a DSL and a router in the same box for wireless home connections
  • Supports multiple standards a,b,g, and n
  • Divided into several radio channels to avoid interference
  • Connects multiple SSIDs broadcasted and hidden
  • Speed and coverage depends on brand and model
  • Obstructed by walls and long distances
  • Configured through firmware directly or web based
  • May work with Power over Ethernet PoE

 

Wireless Access Point (WAP) Security

  • Hidden SSIDs
  • Filtering based on
    • MAC addresses
    • IP addresses
    • Port numbers (Services)
    • Domain Names
  • Encryption
    • WEP
    • WPA
    • AES

 

USB Modem

  • Connects PCs/Laptops to the GSM network via mobile operator
  • Depends on the network generation 3G/4G
  • Needs no wired infrastructure
  • Charging fees according to subscription
  • Less network speed than WiFi
  • Allows more flexibility and mobility

 

Smart Phones

  • Spreading fast over the world
  • WiFi
  • GSM
  • Bluetooth
  • Can act as Hot Spot
  • WiFi is less battery consuming than GSM
  • Charges for GSM depends on subscription
    • Monthly subscription
    • Pay as you go

 

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