1. 802.11b/g/a Wireless Technology Devices
Using x Gear in HSMM
802.11b/g/a
Wireless Technology Devices
Jeff Fant, N5OLF, CWNA, CCAI, CCNA

2. Types of Wireless Networks
Ad Hoc
PC to PC with no Access Point
IBSS
Infrastructure
All PCs communicate with each other through a common Access Point(s)
BSS
EBSS

3. Infrastructure Networks
Basic Service Set
Only on Access Point
Usually connects network to the Internet
Extended Service Set
More than one Access Point
Wired connectivity between Access Points
Usually connectivity to the Internet is through the wired network

4. Types of Wireless Devices
Wireless Gateways
Wireless Routers
Wireless Access Points
Wireless Bridges
Wireless Workgroup Bridges
Wireless Clients
Usually found in the same device
Bridges are an upgrade to an Access Point
Clients

5. Wireless Gateways & Routers
Wireless Gateway (Default)
Runs PPPoE out to an ISP
Router is the edge router
Wireless Router
Runs RIP1 or RIP2
Router is within the network, but not the boundary router

6. Wireless Gateways
ISP
Internet
Network #2
Network #1

7. Wireless Router Internet ISP Wired Gateway Router Network #5
Wireless Routers
Network #1
Network #3

8. Wireless Clients PCI Interface Card USB Cards PCMCIA Insertion Cards
Desktops
USB Cards
Desktops, Laptops & Notebooks
PCMCIA Insertion Cards
Laptops & Notebooks
Build-in Chipset
Notebooks

9. PCI, PCMCIA & USB

10. Wireless Access Points
Access Point does not route traffic between networks
It only performs the function of a portal
Ethernet uses frames
Maximum size 1518 is bytes
Wireless uses frames
Maximum size 2346 is bytes

11. Access Points All wireless clients can be on the same IP network.
Wired Router
All wireless clients can be
on the same IP network.
Network #2
Ethernet 802.3
Client Roaming is Possible
SSID: RED
SSID: RED
SSID: RED
AP #1
AP #2
AP #3
Channel #1
Channel #6
Channel #11
Wireless
Network #1
About 20% to 30% of Cell overlap required for roaming