ISM 4220 EXAM 2 – FRANKS QUESTIONS AND
ANSWERS
In one sentence, what does Wi-Fi mean? - Answers - Alliance of vendors claiming
interoperability.
Can a single access point handle the needs of a 100 employee company? - Answers -
No (only the smallest of companies can)
What set of standards does Wi-Fi follow? - Answers - 802.11
Which is more reliable; wired or wireless? - Answers - Wired
Why is wired more reliable? - Answers - Propagation issues (and interference)
What is the number one issue with Wi-Fi networks? - Answers - Propagation issues
Access points connect wireless devices to ____. - Answers - Ethernet LAN
Radio frequency is measured in ___. - Answers - Hertz
Which antenna type wastes more signal: Dish or Omni Directional? - Answers - Omni
Wi-Fi and Cellular mostly use which type of antenna: Dish or Omni Directional? -
Answers - Omni
With a signal strength of 30 mW from 5 meters, what is the expected strength at 15
meters from the source? - Answers - 3.33 mW
INVERSE Square law
s1 = (r1/r2)^2
Does a higher humidity level impact Wi-Fi signal? - Answers - Yes, makes it worse
What creates the largest amount of interference in Wi-Fi signals? - Answers - Mulitpath
Interference
Do higher frequency signals attenuate faster than lower frequency signals? - Answers -
Yes
Defined radio signal ranges used for a specific purpose, such as FM, are known as? -
Answers - Service Bands
What 3 Wi-Fi channels do not overlap in frequencies? - Answers - 1,6 and 11
, Wi-Fi operating at 5GHz has a maximum channel size of ______. - Answers - 160 MHz
What does Media Access Control methods help with on a Wi-Fi network? - Answers -
Coordinating times when device transmit
19) What technology is used to help with Multipath Interference? - Answers - Spread
Spectrum
20) What is the device needed to convert radio waves to 802.3 ethernet? - Answers - Wi
Fi Access Points
Name the set of services that handle the primary communication tasks on 802.11 based
networks? - Answers - BSS (basic service set)
Are Wi-Fi frames fragmented during transmission?
If yes: what technology is used... If no: Why not? - Answers - Yes
Orthogonal Frequency Division
Which is not part of the Extended Service Set for Access Points?(Handoffs, Roaming,
Signal Strength, Connectivity) - Answers - Connectivity
What is the maximum transmission speed of 802.11ac with MIMO? - Answers -
1.3Gbps
For mesh networking what wireless standard is used? - Answers - 802.11s
Can your network get hacked from the parking lot? - Answers - Yes
What Wi-Fi security technology was TJX using before they were hacked? - Answers -
WEP (wired equivalent protection)
What was the result of TJX not being forthcoming with the breach information? -
Answers - Higher Fines & penalties
What is the action of driving around cataloging Wi-Fi access points, security and
locations? - Answers - War Driving
What makes drive by hacking illegal? - Answers - reading wireless messages and
sending attacks bypassing the firewall
The common name for 802.11i security is _____. - Answers - WPA2
Are all messages encrypted if 802.11i security is used? - Answers - Yes
ANSWERS
In one sentence, what does Wi-Fi mean? - Answers - Alliance of vendors claiming
interoperability.
Can a single access point handle the needs of a 100 employee company? - Answers -
No (only the smallest of companies can)
What set of standards does Wi-Fi follow? - Answers - 802.11
Which is more reliable; wired or wireless? - Answers - Wired
Why is wired more reliable? - Answers - Propagation issues (and interference)
What is the number one issue with Wi-Fi networks? - Answers - Propagation issues
Access points connect wireless devices to ____. - Answers - Ethernet LAN
Radio frequency is measured in ___. - Answers - Hertz
Which antenna type wastes more signal: Dish or Omni Directional? - Answers - Omni
Wi-Fi and Cellular mostly use which type of antenna: Dish or Omni Directional? -
Answers - Omni
With a signal strength of 30 mW from 5 meters, what is the expected strength at 15
meters from the source? - Answers - 3.33 mW
INVERSE Square law
s1 = (r1/r2)^2
Does a higher humidity level impact Wi-Fi signal? - Answers - Yes, makes it worse
What creates the largest amount of interference in Wi-Fi signals? - Answers - Mulitpath
Interference
Do higher frequency signals attenuate faster than lower frequency signals? - Answers -
Yes
Defined radio signal ranges used for a specific purpose, such as FM, are known as? -
Answers - Service Bands
What 3 Wi-Fi channels do not overlap in frequencies? - Answers - 1,6 and 11
, Wi-Fi operating at 5GHz has a maximum channel size of ______. - Answers - 160 MHz
What does Media Access Control methods help with on a Wi-Fi network? - Answers -
Coordinating times when device transmit
19) What technology is used to help with Multipath Interference? - Answers - Spread
Spectrum
20) What is the device needed to convert radio waves to 802.3 ethernet? - Answers - Wi
Fi Access Points
Name the set of services that handle the primary communication tasks on 802.11 based
networks? - Answers - BSS (basic service set)
Are Wi-Fi frames fragmented during transmission?
If yes: what technology is used... If no: Why not? - Answers - Yes
Orthogonal Frequency Division
Which is not part of the Extended Service Set for Access Points?(Handoffs, Roaming,
Signal Strength, Connectivity) - Answers - Connectivity
What is the maximum transmission speed of 802.11ac with MIMO? - Answers -
1.3Gbps
For mesh networking what wireless standard is used? - Answers - 802.11s
Can your network get hacked from the parking lot? - Answers - Yes
What Wi-Fi security technology was TJX using before they were hacked? - Answers -
WEP (wired equivalent protection)
What was the result of TJX not being forthcoming with the breach information? -
Answers - Higher Fines & penalties
What is the action of driving around cataloging Wi-Fi access points, security and
locations? - Answers - War Driving
What makes drive by hacking illegal? - Answers - reading wireless messages and
sending attacks bypassing the firewall
The common name for 802.11i security is _____. - Answers - WPA2
Are all messages encrypted if 802.11i security is used? - Answers - Yes
