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1. It is possible to have a wireless network that does not connect to a wired network.
a.
True
b.
False
ANSWER:
True
2. CSMA/CD is implemented at the data link layer on wireless networks.
a.
True
b.
False
ANSWER:
False
3. Routers are the bridge between wired and wireless networks.
a.
True
b.
False
ANSWER:
False
4. The 802.11b standard introduced Wired Equivalent Privacy (WEP), which gave many users a false sense of
security that data traversing the WLAN was protected.
a.
True
b.
False
ANSWER:
True
5. There are measures for preventing radio waves from leaving or entering a building so that wireless
technology can be used only by people located in the facility.
a.
True
b.
False
ANSWER:
True
6. Which of the following is a transceiver that connects to a network via an Ethernet cable and bridges a
wireless LAN with a wired network?
a.
wireless network interface card (WNIC)
b.
switch
c.
router
d.
access point (AP)
ANSWER:
d
7. Which of the following terms is the rate at which a sound wave repeat?
a.
frequency
b.
amplitude
c.
channel
d.
link
ANSWER:
a
8. When hackers drive around or investigate an area with an antenna, they are usually looking for which
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component of a wireless network?
a.
router
b.
switch
c.
access point
d.
firewall
ANSWER:
c
9. What is the 1 to 32 character configurable name used to identify a WLAN?
a.
WEP
b.
WiFi
c.
LAN
d.
SSID
ANSWER:
d
10. Which of the following IEEE projects was developed to create LAN and WAN standards?
a.
802
b.
EIA/TIA
c.
ISO
d.
801
ANSWER:
a
11. The 802.11 standard applies to the Physical layer of the OSI model, which deals with wireless connectivity
issues of fixed, portable, and moving stations in a local area, and the Media Access Control (MAC) sublayer of
which OSI model layer?
a.
Network Link layer
b.
Data Link layer
c.
transport layer
d.
session layer
ANSWER:
b
12. In 802.11, which of the following is an addressable unit?
a.
host
b.
Data Terminal Equipment (DTE)
c.
station (STA)
d.
wireless NIC (WNIC)
ANSWER:
c
13. Which of the following is contained in a wireless frequency band and breaks up the band into smaller
frequency ranges?
a.
SSIDs
b.
guard bands
c.
cycles
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d.
channels
ANSWER:
d
14. Which frequency band is used by commercial AM radio stations?
a.
extremely low frequency (ELF)
b.
very low frequency (VLF)
c.
medium frequency (MF)
d.
high frequency (HF)
ANSWER:
c
15. Which of the following defines how data is placed on a carrier signal?
a.
Modulation
b.
Multiplexing
c.
Digitization
d.
Adaptation
ANSWER:
a
16. What type of modulation spreads data across a large-frequency bandwidth instead of traveling across just
one frequency band?
a.
Infrared (IR)
b.
Narrowband
c.
Spread spectrum
d.
Microwave
ANSWER:
c
17. Which type of wireless technology uses microwave radio waves to transmit data?
a.
Wideband
b.
Narrowband
c.
Infrared
d.
Mediumband
ANSWER:
b
18. What specific type of spread spectrum modulation allows data to hop to other frequencies to avoid
interference that might occur over a frequency band?
a.
HSSS
b.
DSSS
c.
FHSS
d.
OFSS
ANSWER:
c
19. Which IEEE standard can achieve a throughput of 54 Mbps?
a.
802.11b
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b.
802.11e
c.
802.11g
d.
802.11a
ANSWER:
c
20. What is the IEEE 802 standards name for a wireless network that is limited to one person’s workspace?
a.
WAN
b.
WPAN
c.
WSAN
d.
PAN
ANSWER:
b
21. Which of the following protocols is an enhancement to PPP, and was designed to allow a company to select
its authentication method?
a.
EAP
b.
WEP
c.
WPA
d.
802.1X
ANSWER:
a
22. Which of the following EAP methods uses TLS to authenticate the server to the client, but not the client to
the server?
a.
PPP
b.
EAP
c.
EAP-TLS
d.
PEAP
ANSWER:
d
23. In 802.1X, what component refers specifically to the wireless user attempting access to a WLAN?
a.
host
b.
supplicant
c.
authenticator
d.
authentication server
ANSWER:
b
24. What protocol improves WPA encryption by adding Message Integrity Checks, Extended Initialization
Vectors, Per-packet key mixing, and a Re-keying mechanism to improve encryption?
a.
WEP
b.
TKIP
c.
802.1X
d.
RADIUS
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ANSWER:
b
25. What type of encryption is currently used to secure WPA2?
a.
Radius
b.
TKIP
c.
WEP
d.
AES
ANSWER:
d
26. What standard specifically defines the process of authenticating and authorizing users on a network?
a.
802.11
b.
802.1
c.
802.1X
d.
WEP
ANSWER:
c
27. Which of the following is a flawed wireless authentication standard created to allow users to easily add
devices to a wireless network securely?
a.
WPS
b.
WSS
c.
WEP
d.
AES
ANSWER:
a
28. Which of the following is a utility that is a wireless network detector, sniffer, and an intrusion detection
system?
a.
Kismet
b.
Clonezilla
c.
Vistumbler
d.
Firefox
ANSWER:
a
29. What wireless hacking tool can perform scans for wireless access points and can set up fake APs to social-
engineer users or confuse attackers using airbase-ng?
a.
WiFi Scan
b.
WiFi Pineapple
c.
Fake AP
d.
AP Pineapple
ANSWER:
b
30. If an organization does not want to rely on a wireless device to authenticate users, which of the following is
a secure alternative?
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a.
RADIUS server
b.
Certificate server
c.
WPA2
d.
Proxy server
ANSWER:
a
31. In 802.1X, what is an authentication server?
ANSWER:
This server, which might be a Remote Access Dial-In User Service (RADIUS) server, is used as a centralized
component that authenticates the user and performs accounting functions. For example, an ISP using RADIUS
can verify who logged on to the ISP service and how long the user was connected. Most RADIUS servers are
*nix based, but the Microsoft implementation of RADIUS is called Internet Authentication Service (IAS) in
Windows Server 2000 and Windows Server 2003. It is called Network Policy Server after Windows Server
2008.
32. What is WEP, and is it an acceptable way to secure wireless networks?
ANSWER:
Wired Equivalent Privacy (WEP), part of the 802.11b standard, was developed to encrypt data traversing a
wireless network. For some time, it gave many security professionals a false sense of security that wireless
technology could be just as safe as wired networks. Unfortunately, WEP has been torn to shreds by security
professionals, professors from major universities, and hackers who post ways to crack WEP encryption. Some
argue that WEP is still better than no security at all, and when it’s combined with the security of a virtual
private network (VPN), they claim that WEP works well for home users or small businesses. Still, many saw a
need for a better way to protect WLANs.
33. What are the basic components of a wireless network?
ANSWER:
The basic components of a wireless network are:
– Wireless network interface card (WNIC)
– Access point (AP)
– Wireless networking protocols
– A portion of the RF spectrum
34. What is the role of a wireless NIC?
ANSWER:
For wireless technology to work, each node or computer must have a WNIC, which converts the radio waves
it receives into digital signals the computer understands. There are many wireless NICs on the market, but be
careful deciding which ones to purchase if you’re considering using specific tools for detecting APs and
decrypting WEP keys, or using antennas that can cover a large distance.
35. What is the function of a “working group” within the IEEE?
ANSWER:
Working groups (WGs) of the IEEE are formed to develop new standards. After a WG has reached consensus
on a proposal for a standard, the Sponsor Executive Committee must approve the proposal. Finally, after the
proposal is recommended by the Standards Review Committee and approved by the IEEE Standards Board,
you have a new standard.
36. What is a basic service set (BSS)?
ANSWER:
802.11 uses a basic service set (BSS) as its building block. A BSS is the collection of devices (AP and stations
or just stations) that make up a WLAN. A basic service area (BSA) is the coverage area an AP provides.
37. What is frequency-hopping spread spectrum (FHSS)?
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ANSWER:
Data hops to other frequencies to avoid any interference that might occur over a frequency band. This hopping
from one frequency to another occurs at split-second intervals and makes it difficult for an intruder or attacker
to jam the communication channel.
38. What is the IEEE 802.15 standard?
ANSWER:
The 802.15 standard addresses networking devices within one person’s workspace, which is called the wireless
personal area network (WPAN). The maximum distance between devices is usually no more than 10 meters.
39. What is the Point-to-Point Protocol and how is it utilized?
ANSWER:
PPP stands for Point-to-Point Protocol. Many ISPs use PPP to connect dial-up or DSL users. PPP handles
authentication by requiring a user to enter a valid username and password. PPP verifies that users attempting
to use the link are indeed who they say they are.
40. What is a digital certificate?
ANSWER:
A certificate is a record that authenticates network entities, such as a server or client. It contains X.509
information that identifies the owner, the certificate authority (CA), and the owner’s public key.
Match each item with a statement below.
a.
modulation
b.
spread spectrum
c.
FHSS
d.
narrowband
e.
DSSS
f.
Infrared (IR)
g.
802.1x
h.
EAP
i.
SSID
j.
ad–hoc network
41. Defines how data is placed on a carrier signal
ANSWER:
a
42. Data is spread across a large-frequency bandwidth instead of traveling across just one frequency band
ANSWER:
b
43. Data hops to other frequencies to avoid interference that might occur over a frequency band
ANSWER:
c
44. A technology that uses microwave radio band frequencies to transmit data
ANSWER:
d
45. Data packets are spread simultaneously over multiple frequencies instead of hopping to other frequencies
ANSWER:
e
46. Technology is restricted to a single room or line of sight because this light spectrum cannot penetrate walls
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ANSWER:
f
47. A standard that addresses the issue of authentication
ANSWER:
g
48. An enhancement to PPP, that was designed to allow a company to select its authentication method
ANSWER:
h
49. The name used to identify a WLAN
ANSWER:
i
50. An independent WLAN without an AP
ANSWER:
j