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7 Written questions

6 Multiple choice questions

  1. - available in a range of mobile devices.
    - operates in both ad-hoc mode and infrastructure mode.
    - by default security is disabled but does have three security modes, ranging from full data encryption to integrity control.
    - only authenticates devices, not users.
    - vulnerable to buffer over flow.
  2. - needs to establish an end to end path before transmission.
    - analogue networks.
    - ISDN
    - PPP
  3. - based on EAP framework; negotiate authentication method at startup.
    - 802.1X standard.
    - uses AES
  4. transmission of frames to a subset of the machines on the broadcast network.
  5. - Similar to bridge in that it routes frames.
    - most commonly used to connect individual computers.
  6. - used for router-to-router traffic, and home user to ISP traffic.
    - handle error detection.
    - allows IP addresses to be negotiated.
    - so used in dial up it will set-up the connection with ISP and negotiate an IP address.
    - replaced SLIP in many uses.

6 True/False questions

  1. Main task of the data link layertransform raw transmission facility into a line that appears free of undetected errors to the network layer.
    Accomplishes this by having the sender break up the input into frames, and transmit them sequentially. If the service is reliable, the receiver confirms the correct receipt of each frame.


  2. 802.11g- operates in different frequency range - 5 GHZ.
    - less prone to interference.
    - greater speeds.
    - not as widely used.


  3. Blue jacking (bluetooth)Attacker can use AT commands on victims cell to initiate calls, send messages etc.


  4. ARPdata link layer protocol described by the 802.11 standard.
    - uses RC4 often reuses IV.
    - many installations use the same shared key for all users, so each user can read each others traffic.
    - vulnerable to a number of known attacks.


  5. bridgestransmission of frames to all machines on the broadcast network.


  6. SSID- straight out of the box, no security configured at all.
    - WAPs are usually configured to broadcast their presence.
    - each wireless network node and access point needs the same SSID.
    - could choose not to broadcast SSID.
    - Also could implement MAC filtering.