wireless networks 2015 ctsp course ctsp clsss wireless - february 20151
TRANSCRIPT
CTSP Clsss Wireless - February 2015 1
Wireless Networks2015 CTSP Course
CTSP Clsss Wireless - February 2015 2
Wireless Bridge Wireless Router Access Point LAN Switch Wireless Client
Equipment
3
OSI Model (Stack)
CTSP Clsss Wireless - February 2015or
4
WAN port Gateway to Internet Service Provider (ISP) DSL modem provided by ISP Limited LAN ports (4 ports is common) Can service as a wireless access point with
limited clients (16 is common) Limited firewall capability
Wireless Router
CTSP Clsss Wireless - February 2015
CTSP Clsss Wireless - February 2015 5
One LAN port connection No WAN port (can not directly connect to ISP
as a router) Extends your wired LAN through the use of
radio frequency (RF) and by definition it’s simply a bridge
AP is an one to many clients implementation of a bridge (client bridge)
IEEE 802.11(a, b, g, n, ac) standard
Access Point (AP)
CTSP Clsss Wireless - February 2015 6
Point to Point implementation that extends one physical LAN to another physical LAN within the same collision domain
Instead of using cable, Radio waves are used as a medium (conduit)
Layer 2 of the OSI model using MAC addresses (nodes)
Does not see IP addresses, therefore not routable Ex: Connects two adjacent building in a campus
shared across same broadcast domain
Wireless Bridge
CTSP Clsss Wireless - February 2015 7
Bridge Pair
Site A Site B
CTSP Clsss Wireless - February 2015 8
McClellan Campus Dorms APs
CTSP Clsss Wireless - February 2015 9
McClellan Dorms Bridges
CTSP Clsss Wireless - February 2015 10
Wireless Standard
802.11 a b g n & ac
CTSP Clsss Wireless - February 2015 11
Operates in the 5.15GHz to 5.35GHz radio spectrum. Speed: Up to 54Mbps (actual throughput is closer to
22Mbps) Range: 115 feet indoor Less prone to interference. More expensive and use in enterprise implementation Because 802.11b and 802.11a use different radio
technologies and portions of the spectrum, they are incompatible with one another.
802.11a
CTSP Clsss Wireless - February 2015 12
Operates in the 2.4GHz radio spectrum Speed: Up to 11Mbps Range: 115 feet indoor Prone to interference (it shares airspace with
cell phones, Bluetooth, security radios, and other devices).
Least expensive wireless LAN specification
802.11b
CTSP Clsss Wireless - February 2015 13
Operates in the 2.4GHz radio spectrum. Speed: Up to 54Mbps Range: 125 feet indoor Prone to interference (it shares airspace with
cell phones, Bluetooth, security radios, and other devices).
802.11g
CTSP Clsss Wireless - February 2015 14
Operates in the 2.4 or 5GHz radio spectrum (dual band)
Speed: Up to 700Mbs Range: 230 feet indoor Because 802.11b and 802.11g use the same
radio technologies and portions of the spectrum, they are compatible with one another.
802.11n
15
Bandwidth: Up to 1000 Mb/s (multi-station) or 500 Mb/s (single-station)
Range: 115 feet indoor Beamforming (targets clients) Frequency range: 5.0 GHz Multi-user MIMO Spatial Streams 3 Waves of implementation Currently in wave 1 -- wave 2 devices in 2015
802.11ac (new)
CTSP Clsss Wireless - February 2015
CTSP Clsss Wireless - February 2015 16
802.11ac
CTSP Clsss Wireless - February 2015 17
PicoStation2 setup in bridge mode Extend your Cat5 LAN with WLAN IP addresses of your WLAN is in the same
broadcast domain as your wired LAN ISP router will provide DHCP and DNS
services Try using open network first and then WEP
key for encryption Test all your clients for connectivity
Exercise 1AP Bridge
CTSP Clsss Wireless - February 2015 18
PicoStation2 setup in router mode Extend your Cat5 LAN with WLAN but this time
create another LAN just for WiFi WLAN IP addresses of your WLAN is in a different
broadcast domain than your wired LAN (IP addresses is not the same as wired)
Your AP will provide DHCP and DNS services inherited ISP’s router
Use WPA2 / AES Test all your clients for connectivity
Exercise 2AP as Router