Computer Networks/Wireless
Appearance
This lesson introduces wireless networking concepts.
Objectives and Skills
[edit | edit source]Objectives and skills for the wireless networking portion of Network+ certification include:[1]
- Given a scenario, deploy the appropriate wireless standard
- 802.11a
- 802.11b
- 802.11g
- 802.11n
- 802.11ac
- Install and configure wireless LAN infrastructure and implement the appropriate technologies in support of wireless capable devices
- Small office/home office wireless router
- Wireless access points
- Device density
- Roaming
- Wireless controllers
- VLAN pooling
- LWAPP
- Wireless bridge
- Site surveys
- Heat maps
- Frequencies
- 2.4 Ghz
- 5.0 Ghz
- Channels
- Goodput
- Connection types
- 802.11a-ht
- 802.11g-ht
- Antenna placement
- Antenna types
- Omnidirectional
- Unidirectional
- MIMO/MUMIMO
- Signal strength
- Coverage
- Differences between device antennas
- SSID broadcast
- Topologies
- Adhoc
- Mesh
- Infrastructure
- Mobile devices
- Cell phones
- Laptops
- Tablets
- Gaming devices
- Media devices
- Given a scenario, troubleshoot and resolve common wireless issues
- Signal loss
- Interference
- Overlapping channels
- Mismatched channels
- Signal-to-noise ratio
- Device saturation
- Bandwidth saturation
- Untested updates
- Wrong SSID
- Power levels
- Open networks
- Rogue access point
- Wrong antenna type
- Incompatibilities
- Wrong encryption
- Bounce
- MIMO
- AP placement
- AP configurations
- LWAPP
- Thin vs thick
- Environmental factors
- Concrete walls
- Window film
- Metal studs
- Wireless standard related issues
- Throughput
- Frequency
- Distance
- Channels
Readings
[edit | edit source]- Wikipedia: Wireless network
- Wikipedia: Wi-Fi
- Wikipedia: Wireless router
- Wikipedia: Wireless access point
- Wikipedia: Wireless LAN controller
Multimedia
[edit | edit source]- YouTube: 802.11 Wireless Standards - CompTIA Network+ N10-006 - 5.3
- YouTube: Wireless Network Devices - CompTIA Network+ N10-006 - 2.7
- YouTube: Wireless LAN Controllers - CompTIA Network+ N10-006 - 1.2
- YouTube: Wireless Connections - CompTIA Network+ N10-006 - 2.7
- YouTube: Wireless Antenna Technologies - CompTIA Network+ N10-006 - 2.7
- YouTube: Using Wireless Networks - CompTIA Network+ N10-006 - 2.7
- YouTube: Troubleshooting Wireless Signals - CompTIA Network+ N10-006 - 4.3
- YouTube: Troubleshooting Wireless Configurations - CompTIA Network+ N10-006 - 4.3
Activities
[edit | edit source]- Set up and configure a basic wireless router using either a router emulator or your home router:
- Use a SOHO router emulator to set up and configure a basic wireless router:
- Change the default administrator password for the device.
- Configure wireless security by setting a new SSID name and setting the security mode to WPA2 with a strong password.
- Research current firmware releases for the device. Locate the router's firmware upgrade page and review instructions from the router's Help page on how to update the firmware.
- Review settings for your home router:
- Verify that the administrator password has been changed from the default.
- Verify that the SSID security mode is set to WPA2 with a strong password.
- Research current firmware releases for the device and determine whether a firmware update is required.
- Use a SOHO router emulator to set up and configure a basic wireless router:
- Set up and configure a wireless access point using either an access point emulator or an available access point:
- Use an Cisco: Wireless Access Point Emulator or your own device to set up and configure a wireless access point.
- Change the default administrator password for the device.
- Configure wireless security by setting a new SSID name and setting the security mode to WPA2 with a strong password.
- Research current firmware releases for the device. Locate the router's firmware upgrade page and review instructions from the router's Help page on how to update the firmware.
- Compare options and interface settings with the wireless router configuration above.
- Use an Cisco: Wireless Access Point Emulator or your own device to set up and configure a wireless access point.
- Review Wikipedia: Wardriving. Use a free wireless scanner and scan your environment for wireless networks:
- Windows:
- Review Archive: BitDreamers: Improve WLAN Signal Without Additional Tools on Windows.and Wikipedia: NetSpot.
- Use the
netsh wlan show networks mode=bssid
command or download and install NetSpot and scan for wireless networks.
- macOS:
- Review AppStorm: How to Discover Any Network with iStumbler and Wikipedia: NetSpot.
- Download and install iStumbler or NetSpot and scan for wireless networks.
- Linux:
- Review TuxMobil.org: Linux Wireless Sniffer.
- Download and install a wireless scanner and scan for wireless networks.
- Android:
- Review Google: farproc Wifi Analyzer.
- Download and install Wifi Analyzer and scan for wireless networks.
- iOS:
- Review WLANBook: Free WiFi Scanner for iPhone and iPad Without Jailbreak.
- Download and install the Apple AirPort Utility and scan for wireless networks.
- Windows:
- Review Wikipedia: Wireless ad hoc network. Set up a wireless ad hoc network.
- Windows:
- Review Microsoft: Set up a Computer-to-Computer Ad Hoc Network.
- Set up an ad hoc network.
- macOS:
- Review MacObserver: How to Create and Use an Ad Hoc Network on Your Mac.
- Set up an ad hoc network.
- Linux:
- Review ArchLinux: Ad Hoc Networking.
- Search the Internet for specific ad hoc networking instructions for your Linux distribution.
- Set up an ad hoc network.
- Windows: