wireless networks 2015 ctsp course ctsp clsss wireless - february 20151

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Wireless Networks 2015 CTSP Course CTSP Clsss Wireless - February 2015 1

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Page 1: Wireless Networks 2015 CTSP Course CTSP Clsss Wireless - February 20151

CTSP Clsss Wireless - February 2015 1

Wireless Networks2015 CTSP Course

Page 2: Wireless Networks 2015 CTSP Course CTSP Clsss Wireless - February 20151

CTSP Clsss Wireless - February 2015 2

Wireless Bridge Wireless Router Access Point LAN Switch Wireless Client

Equipment

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OSI Model (Stack)

CTSP Clsss Wireless - February 2015or

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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

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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)

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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

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Bridge Pair

Site A Site B

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McClellan Campus Dorms APs

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McClellan Dorms Bridges

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Wireless Standard

802.11 a b g n & ac

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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

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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

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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

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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

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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

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802.11ac

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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

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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