7 Written Questions
6 Multiple Choice Questions
- - backwards compatible with 802.11b so same WAP can service 802.11g and 802.11b.
- - operates in different frequency range - 5 GHZ.
- less prone to interference.
- greater speeds.
- not as widely used.
- Attacker can use AT commands on victims cell to initiate calls, send messages etc.
- - developed before 802.11a.
- data throughput of up to 11Mbps.
- most widely used standard; as a result the frequency is crowded; might run into interference from other wireless devices.
- networks secured through use of WPA and WEP.
- 2.4 ghz
- - Similar to bridge in that it routes frames.
- most commonly used to connect individual computers.
- transmission of frames to a subset of the machines on the broadcast network.
6 True/False Questions
bridges → transmission of frames to all machines on the broadcast network.
Blue tooth → transmission of frames to all machines on the broadcast network.
SSID → data 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.
Point to point protocol (PPP) → - 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.
Unicast → transmission of frames to a subset of the machines on the broadcast network.
Main task of the data link layer → transform 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.