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7 Written questions

6 Multiple choice questions

  1. transmission of frames to a subset of the machines on the broadcast network.
  2. - associated with point-to-point networks.
    - point to point transmission with one sender and one receiver.
  3. - needs to establish an end to end path before transmission.
    - analogue networks.
    - ISDN
    - PPP
  4. - 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.
  5. - backwards compatible with 802.11b so same WAP can service 802.11g and 802.11b.
  6. - 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.

6 True/False questions

  1. 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.

          

  2. Blue bug attack (bluetooth)allows an anonymous message to be displayed on victims device.

          

  3. switchesconnects two or more LANs.
    When a frame arrives, software in the bridge extracts the frame header and looks it up in a table to see where to send the frame.
    - different line cards for different technologies, Ethernet, FDDI etc.
    - each line has its own collision domain.

          

  4. Packet-switching- chatty.
    - no dedicated path required.

          

  5. bridgesconnects two or more LANs.
    When a frame arrives, software in the bridge extracts the frame header and looks it up in a table to see where to send the frame.
    - different line cards for different technologies, Ethernet, FDDI etc.
    - each line has its own collision domain.

          

  6. Main task of the data link layer- 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.

          

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