Question 40 4 pts

Which core diameter is used in multimode fiber.

8 microns

8 mm

50 mm

50 microns

Flag this Question

Question 41 4 pts

Wi-Fi is a term used by the ________.

Wi-Fi Alliance

neither A nor B

IEEE

both A and B

Flag this Question

Question 42 4 pts

Compared to wired transmission, propagation problems in radio transmissions are ________.

about as bad

better

worse

Flag this Question

Question 43 4 pts

Wireless radio transmission speed is usually measured in terms of ________.

amplitude

wavelength

frequency

dollars

Flag this Question

Question 44 4 pts

Wi-Fi normally uses a(n) ________.

dish antenna

omnidirectional antenna

neither A nor B

both A and B

Flag this Question

Question 45 4 pts

What propagation problem is especially bad in moist air?

electromagnetic interference

inverse square law attenuation

absorptive attenuation

multipath interference

Flag this Question

Question 46 4 pts

The most serious problem with wireless transmission in WLANs is ________.

multipath interference

absorptive attenuation

inverse square law attenuation

shadow zones

Flag this Question

Question 47 4 pts

To handle multiple conversations in 802.11 transmission, you normally use multiple ________.

channels

service bands

frequencies

wires

Flag this Question

Question 48 4 pts

To transmit very rapidly in radio, you need ________.

wide bandwidth

narrow bandwidth

single-mode transmission

single-frequency transmission

Flag this Question

Question 49 4 pts

Channels with wide bandwidths are called ________ channels

full-duplex

broadband

parallel

multimode

Flag this Question

Question 50 4 pts

Companies prefer the 5 GHz band because there is ________ than in the 2.5 GHz band.

less absorptive attenuation

both A and B

neither A nor B

more bandwidth

Flag this Question

Question 51 4 pts

If a drive-by hacker succeeds in connecting to an internal access point, the network traffic is ________.

still protected by a firewall

still protected by encryption

neither A nor B

both A and B

Flag this Question

Question 52 4 pts

In 802.11i, protection is provided between the client and the ________.

router

server

switch

access point

Flag this Question

Question 53 4 pts

The Wi-Fi Alliance calls 802.11i ________.

WEP

WPA

none of the above

WPA2

Flag this Question

Question 54 4 pts

What is the strongest security protocol for 802.11 today?

802.11i

802.11s

WPA

802.11X

Flag this Question

Question 55 4 pts

802.11i 802.1X initial authentication mode was created for ________.

corporations with less than eight access points

residences with a single access point

corporations with multiple access points

residences with less than eight access points

Flag this Question

Question 56 4 pts

In what initial authentication mode of 802.11i is a central authentication server used?

PSK

both A and B

802.1X

neither A nor B

Flag this Question

Question 57 4 pts

A rogue access point is usually created by ________.

an evil twin

the IT security department

an employee

an external attacker

Flag this Question

Question 58 4 pts

If a company uses 802.11i for its core security protocol, an evil twin access point will set up ________ 802.11i connection(s).

two

one

four

none of the above

Flag this Question

Question 59 4 pts

Which of the following is usually set up by a hacker outside the building?

both A and B

a rogue access point

an evil twin access point

neither A nor B

Flag this Question

Question 60 4 pts

You should use a VPN ________.

always

if you know that an evil twin access point is in use.

if you know that your device has been compromised by an evil twin attack.

never