Questions of the Day Flashcards
(4 cards)
Which of the following protocols operates on 2.4GHz and has a bandwidth of 1Mbps or 2Mbps?
A. 802.11g
B. 802.11a
C. 802.11b
D. 802.11
Answer - D - 802.11 operates at 2.4GHz and allows for bandwidths of 1Mbps or 2Mbps.
Key Takeaway: 802.11 is the original version of the standard IEEE 802.11. Released in 1997, it specified two net bit rates of 1 or 2 Mbit/s, in addition to a forward error correction code. It specified three alternative physical layer technologies: diffuse infrared operating at 1 Mbit/s, frequency-hopping spread spectrum operating at 1 Mbit/s or 2 Mbit/s, and direct-sequence spread spectrum operating at 1 Mbit/s or 2 Mbit/s. It is almost obsolete now.
Which of the following products verifies that files received by an SMTP server do not contain any suspicious code?
A. IDS
B. Web virus filter
C. Packet filter firewall
D. E-mail virus filter
Which of these biometric methods is considered the most accurate of the different biometric authentication types?
Iris scan
Retina scan
Facial geometry
Fingerprint scan
A retina scan is the most accurate and dependable of all the biometric authentication types.
Key Takeaway: The retina scan uses the blood vessel pattern at the back of the eye to verify the identity of an individual. This method is more accurate than virtually any other biometric technology. The iris scan method uses the iris pattern of the eyeball to identify an individual. Iris scans can be done regardless of whether the subject is wearing contact lenses or glasses. However, it is necessary for the system to take eye lids and eye lashes into account; both can obscure the necessary parts of the eye and cause false information to be added into automated systems.This biometric method is both easy to use and noninvasive.
John is complaining that the contacts in his mailbox are receiving continuous e-mails from his ID, without him actually sending anything. Which of the following could have caused this?
DoS
Sniffing
TCP/IP hijacking
Worm
Worm
