Wireless II

Frames

Frames – Notes 3 Frame type ▫Management  Beacons  Probes  Request  Response  Associations  Request  Response  Disassociate  Authentication  Auth  Deauth ▫Control  RTS  2 way handshake  CTS  Time to send  ACK ▫Data

Frames – Questions What are the 3 types of WiFi frames ▫Management ▫Control ▫Data What are the 4 management frames ▫Beacon * ▫Probe * ▫Association ▫Auth

Beacon Frames and Injection

Beacon Frames and Injection – Notes Beacon: announces presence wireless device Beacon types ▫Ad-hoc ▫Ssid  32 character identifier ▫Timestamp ▫Capability  Channel  Data Rate MDK3

Beacon Frames and Injection – Questions ▫What is the name of the 32 bit string identifier  SSID ▫What is the typical default broadcast interval for the SSID?  10 sec

Frame Analyzing

Frame Analyzing – Notes ID ▫SSID  32 character text ▫BSSID  6 hex octets  Typically the MAC address ▫ESSID  All the BSSs in the network  Basically the SSID Wireshark Aircrack ▫Airbase-ng MDK3

Frame Analyzing – Questions Which xSSID is by default the MAC address ▫BSSID How many octets is the BSSID ▫6

Probe Requests and Responses

Probe Requests and Responses – Notes Probes: active Beacons: passive Probe ▫Client ▫Request ▫Respond Info ▫Data rates ▫Ssid ▫Timestamp ▫Type of security Who can you probe ▫A specific AP ▫All

Probe Requests and Responses – Questions Which frame type is active vs. passive ▫Probe What is sent as a probe response ▫SSID ▫Data rates ▫Timestamp ▫Type of security