Title: Class Outline 20
Course: KVCC CPT128 > Section: Class Outlines

a.      Wireless Lans

a.      Architecture

i.           Infrastructure

ii.           Ad hoc

b.      The physical layer

i.           Frequency

1.      2.4

2.      5

ii.           Rate adaption

iii.           802.11 b - 11Mbps 2.4 Ghz

iv.           802.11 a- 54Mbps 5 Ghz

1.      OFDM

v.           802.11 g - 54Mbps 2.4 Ghz

1.      FCC Drops Rule about Spread Spectrum in 2002

vi.           802.11 n - 600Mbps Both

1.      MIMO

vii.           802.11 ac - 1.3Gbps+ 5 Ghz

1.      If dual band then is using N at the 2.4 Level

c.      Mac sublayer

i.           CSMA/CA

ii.           Ack

iii.           Transmission Range Problem

iv.           Physical and Virtual Sensing

v.           NAV Network Allocation Vector

vi.           RTS

vii.           CTS

viii.           Problems with reliability

Slow rate

Reduce Size

1.      Fragments

ix.           Power Saving

1.           Beacon Frames - every 100msec

2.           Power Save modeAutomatic power save delivery APSD

x.           DIFS - DCF Interframe Spacing

xi.           Rate anomaly

d.      Frame Structure

i.     Pg 310

e.      Services

i.     Association

ii.     Reassociation

iii.     Disassociate

iv.     Authenticate

1. WEP
2. WPA2
3. Distribution
4. Integration
5. Data Delivery
6. AES
7. QOS
8. Transmit power control
9. Dynamic frequency selection

Attached Files: | - KVCC CPT128_FundNetworkAdmin_Outline 20.pdf