OS Hardening – SEC340 Chapter 6, 7 – Flashcards
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In which frequency range are you likely to find WLANs? Select one: a. 2.9-30 GHz b. 3-30 MHz c. 30-300 GHz d. 174-328 MHz
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a. 2.9-30 GHz
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In which type of attack do attackers intercept the transmissions of two communicating nodes without the user's knowledge? Select one: a. man-in-the-middle b. rogue device c. brute force d. wardriver
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a. man-in-the-middle
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In which type of wireless attack does the attacker cause valid users to lose their connections by sending a forged deauthentication frame to their stations? Select one: a. jamming b. association flood c. MAC address spoofing d. session hijacking
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d. session hijacking
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What does a measurement of +3 dB equal in power measured in mW? Select one: a. one half the power b. 3 times the power c. one third the power d. double the power
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d. double the power
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What function does a RADIUS server provide to a wireless network? Select one: a. association b. encryption c. decryption d. authentication
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d. authentication
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What is a Basic Service Set? Select one: a. wireless devices set up as a basic ad-hoc network b. a wireless network that does not use an AP c. a group of wireless devices served by a single AP d. multiple APs are set up to provide some overlap
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c. a group of wireless devices served by a single AP
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What is a potential problem with having too many APs in a given area? Select one: a. refraction b. fading c. multipath d. co-channel interference
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d. co-channel interference
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What is a WNIC's equivalent of a NIC's promiscuous mode? Select one: a. passive attack mode b. RF monitor mode c. active scan mode d. auto-capture mode
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b. RF monitor mode
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What is considered to be one of the biggest weaknesses of WEP? Select one: a. 128-bit key b. RC4 encryption c. Kerberos authentication d. 24-bit initialization vector
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d. 24-bit initialization vector
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What is used to convert an analog RF signal into digital format? Select one: a. EIRP b. carrier c. modulator Correct d. spectrum
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c. modulator
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What term is given to a device that is designed to generate radio signals, not including those from the antenna? Select one: a. intentional radiator b. oscillator c. EIRP d. conductive medium
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a. intentional radiator
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Which binary signaling technique uses a scheme in which zero voltage represents a 0 bit and the voltage for a 1 bit does not drop back to zero before the end of the bit period? Select one: a. RTZ b. NRZ c. polar NRZ d. polar RTZ
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b. NRZ
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Which digital signal modulation method is a binary modulation technique in which the carrier signal's frequency is changed to represent a 1 or 0 bit? Select one: a. ASK b. PSK c. FDM d. FSK
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d. FSK
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Which EAP protocol requires digital certificates to validate supplicants? Select one: a. EAP-TLS b. EAP-TTLS c. FAST d. LEAP
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a. EAP-TLS
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Which layer does wireless communication rely heavily upon? Select one: a. MAC sublayer of the Network layer b. LLC sublayer of the Transport layer c. LLC sublayer of the Data Link layer d. MAC sublayer of the Data Link layer
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d. MAC sublayer of the Data Link layer
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Which management frame type is sent by a station wanting to terminate the connection? Select one: a. Reassociation request b. Disassociation c. Probe response d. Deauthentication
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b. Disassociation
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Which of the following causes of signal loss is defined as differences in density between air masses over distance? Select one: a. absorption b. reflection c. refraction d. scattering
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c. refraction
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Which of the following is defined as the maximum departure of a wave from the undisturbed state? Select one: a. amplitude b. spectrum c. wavelength d. frequency
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a. amplitude
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Which of the following is defined as the positive difference in amplitude between two signals? Select one: a. fading b. attenuation c. reflection d. gain
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d. gain
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Which of the following is NOT a field in a control frame? Select one: a. Frame control b. Sequence control c. Frame check sequence d. Duration
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b. Sequence control
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Which of the following is NOT a suggested practice before using a newly configured wireless network? Select one: a. alter the default channel b. change the administrator password c. change the manufacturer's default key d. use the default encryption method
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d. use the default encryption method
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Which of the following is NOT part of a wireless MAC frame? Select one: a. 802.11 protocol version b. FCS c. source MAC address d. TTL
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d. TTL
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Which of the following is performed by the MAC sublayer? Select one: a. joining the wireless network b. resolving IP address to MAC address c. determining best path d. resolving names to IP addresses
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a. joining the wireless network
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Which of the following is true about IEEE 802.11i? Select one: a. temporal key integrity protocol is used for encryption b. it uses WEP2 for authentication and encryption c. it uses PMK to generate data encryption keys d. it uses a symmetric block cipher for encryption
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d. it uses a symmetric block cipher for encryption
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Which of the following is true about infrared transmissions? Select one: a. diffused IR transmission requires emitter and detector to be aligned b. IR transmissions have speeds up to 25 Mbps. c. the intensity of the light pulse indicates the on or off status of each bit d. directed IR transmission relies on reflected light
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c. the intensity of the light pulse indicates the on or off status of each bit
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Which of the following is true about MAC addresses in a wireless network? Select one: a. MAC addresses are Network layer identities b. MAC address filtering will stop a determined attacker c. you can change a WNICs MAC address with software d. you need to configure the MAC address before you use the WNIC
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c. you can change a WNICs MAC address with software
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Which of the following is true about RF transmissions? Select one: a. cooler objects produce higher-frequency radiation than hotter objects Incorrect b. frequency is the distance between waves c. frequency has an inverse relationship with wavelength d. EM radiation is measured in volts
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c. frequency has an inverse relationship with wavelength
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Which of the following is true about the association process? Select one: a. a station first send an association request b. the AP transmits an invitation to associate c. it is a three-step process d. a station first listens for beacons
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d. a station first listens for beacons
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Which of the following is true about the SSID? Select one: a. they are found in control frames b. they are not found in beacon frames c. they are registered d. they can be Null
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d. they can be Null
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Which of the following is true about wardriving? Select one: a. attackers use RF monitor mode b. the hardware is very expensive c. the software is very expensive d. their goal is simply to hijack a connection
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a. attackers use RF monitor mode
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Which of the following pairs represents a medium frequency band and its common use? Select one: a. 3-30 MHz, CB and shortwave radio b. 300 KHz-3MHz, AM radio c. 144-174 MHz, TV channels d. 30-300 KHz, cordless phones
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b. 300 KHz-3MHz, AM radio
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Which of the following tasks does an AP typically perform? Select one: a. bridges between the wired and wireless network b. routes packets from subnet to subnet c. acts as a hub for a wired network d. divides data into packets
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a. bridges between the wired and wireless network
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Which popular wireless sniffer is an IDS that is passive and undetectable in operation? Select one: a. AirSnort b. NetStumbler c. Kismet d. Aircrack-ng
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c. Kismet
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Which RF transmission method uses an expanded redundant chipping code to transmit each bit? Select one: a. CDMA b. FHSS c. DSSS d. OFDM
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c. DSSS
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Which term is the measurement of the difference between two signals? Select one: a. watt b. volt c. decibel d. amp
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c. decibel
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Which type of analog modulation changes the number of waves representing one cycle? Select one: a. amplitude modulation b. frequency modulation c. relative modulation d. phase modulation
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b. frequency modulation
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Which type of control frame does a station send to let the AP know is can transmit buffered frames? Select one: a. ACK b. CTS c. PS-Poll d. RTS
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c. PS-Poll
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Which type of frame advertises services or information on a wireless network? Select one: a. Probe request b. Probe response c. Association response d. Beacon
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d. Beacon
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Which wireless networking standard uses the 2.4 GHz band and has a maximum bandwidth of 54 MBps? Select one: a. 802.11ac b. 802.11g c. 802.11b d. 802.11a
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b. 802.11g
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Which wireless transmission method uses a hopping code? Select one: a. FHSS b. infrared c. OFDM d. narrowband
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a. FHSS
