Wireless Communications Exam Questions
Course Introduction
Wireless Communications explores the principles, technologies, and applications that enable the transmission of information without physical connections. This course covers fundamental concepts such as radio wave propagation, modulation techniques, channel coding, and multiple access methods. Students will examine the design and performance of modern wireless systems, including cellular networks, Wi-Fi, Bluetooth, and emerging standards like 5G. Emphasis is placed on practical challenges such as interference, fading, security, and spectrum management. Through a combination of theoretical analysis and case studies, learners gain a comprehensive understanding of the key components and innovations driving wireless communication in todays connected world.
Recommended Textbook
CWSP Guide to Wireless Security 1st Edition by Mark Ciampa
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Page 2
Chapter 1: Foundations of Wireless Security
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Sample Questions
Q1) Just as a WLAN gives users mobility for accessing data, ____ provides that same freedom for voice communication.
A) 802.11n
B) WiMAX
C) VoWLAN
D) 802.11i
Answer: C
Q2) Wireless LAN applications can be found in every industry whose employees need or want to conduct business without being confined to a specific location.
A)True
B)False
Answer: True
Q3) A ____ site provides office space but the customer must provide and install all the equipment needed to continue operations.
A) cold
B) hot
C) warm
D) red
Answer: A
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Page 3
Chapter 2: Wireless LAN Vulnerabilities
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Sample Questions
Q1) Briefly explain how turning off the beaconing of the SSID affects roaming in a wireless network environment.
Answer: Turning off SSID beaconing prevents wireless devices from freely roaming from one wireless network to another. To increase the area of coverage of a wireless LAN, multiple access points are installed with areas of overlap, much like cells in a cellular telephone system. The APs can be positioned so that the cells overlap to facilitate movement between cells, known as roaming. When a mobile wireless user (perhaps carrying a wireless laptop computer) enters into the range of more than one AP, the wireless device will choose an AP based on signal strength (some also look at packet error rates). Mobile devices constantly survey the radio frequencies at regular intervals to determine if a different AP can provide better service. If it finds one (perhaps because the user has moved closer to it), then the device automatically attempts to associate with the new AP (this process is called a handoff).
Q2) Deploying dynamic WEP is a very expensive solution that involves a lot of effort.
A)True
B)False
Answer: False
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Page 4
Chapter 3: Passive Wireless Discovery
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Sample Questions
Q1) NetStumbler can capture and decode wireless packets, monitor utilization, or make automatic connections to networks it discovers.
A)True
B)False
Answer: False
Q2) Briefly describe a packet sniffer.
Answer: One means of monitoring the network is to use a packet sniffer, which captures TCP/IP packets as they are being transmitted.Wired packet sniffers can be either separate devices or software that is installed on a computer and operates in promiscuous mode. There are three categories of packet sniffers based on their functions:
* Counts the number of packets that are being transmitted
* Shows general characteristics of traffic
* Provides a detailed analysis of all protocols
Q3) ____ antennas send a narrowly focused signal beam.
A) Cyclic directional
B) Omni-directional
C) Semi-directional
D) Highly directional
Answer: D
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Chapter 4: Active Wireless Attacks
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Sample Questions
Q1) DoS attacks are rare against wired network servers.
A)True
B)False
Q2) Briefly explain the password paradox.
Q3) One of the spyware tools often used is ____.
A) DoS
B) spam
C) adware
D) rogue APs
Q4) What are the problems with using default passwords?
Q5) A ____ program creates fake packets and flood the wireless network.
A) MAC
B) packet sniffer
C) packet generator
D) CSMA/CA
Q6) What are the security problems related to adware?
Q7) What are some of the characteristics of weak passwords?
Q8) A(n) ____________________ may be defined as a weakness or flaw in an information system that could be exploited to cause harm.
Q9) What are the problems of using community strings in SNMP? Page 6
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Page 7
Chapter 5: Wireless Security Models
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Sample Questions
Q1) PSK requires that a key (also called a(n) ____) be entered in both the access point and the wireless devices.
A) shared secret
B) MIC key
C) mixed key
D) interval key
Q2) The block cipher used in 802.11i is the ____________________.
Q3) What are the steps involved in the 802.1x authentication procedure?
Q4) When using the transitional security model, open system authentication should be used instead of shared key authentication.
A)True
B)False
Q5) In the WPA personal security model, the wireless device has two keys, a 128-bit encryption key called the ____ key and a 64-bit MIC.
A) per-packet
B) temporal
C) CRC
D) TKIP
Q6) What are some of the limitations of MAC address filtering?
Page 8
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Chapter 6: Enterprise Wireless Hardware Security
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Sample Questions
Q1) A(n) ____ switch provides no management capabilities in the operation of the switch.
A) audited
B) managed
C) unmanaged
D) controlled
Q2) What is the problem solved by the Inter-Access Point Protocol (IAPP)?
Q3) In EDCA, the four different streams, called ____, are differentiated in terms of priority.
A) port categories
B) access ports
C) access categories (AC)
D) port filters
Q4) Describe the main characteristics of transmit power control (TPC).
Q5) The 802.11 MAC layer ____________________ mode is based upon polling and serves as a centralized scheduling mechanism.
Q6) What are the three basic types of filtering?
Q7) What are some of the advantages and disadvantages of ad hoc wireless mesh networks?
Q8) What are some of the advantages of a wireless router?
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Chapter 7: Designing a Secure Wireless Network
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Sample Questions
Q1) In a standard wired Ethernet network, all devices share the same media and a device can send a packet at any time rather than in a fixed or predictable fashion (known as ____ networking).
A) deterministic
B) sequential
C) polling
D) non-deterministic
Q2) ____ is used to create smaller segments for security purposes.
A) CSMA/CA
B) CSMA/CD
C) Ethernet
D) Segmentation
Q3) What is security by obscurity?
Q4) ____ is the practice of dividing the network into smaller units.
A) Switching
B) Segmentation
C) VLANs
D) Filtering
Q5) What are the benefits of layering security?
Q6) Briefly describe how to create wireless VLANs using switches.
Page 10
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Chapter 8: Secure Wireless Authentication
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Sample Questions
Q1) What are the advantages and disadvantages of distributed autonomous site deployment?
Q2) What are the steps for creating a pairwise master key (PMK)?
Q3) The ____ is the value that the wireless devices use to decrypt broadcast messages from APs.
A) GTK
B) MK
C) PTK
D) PMK
Q4) What are the primary differences between LDAP and DAP?
Q5) The system of using digital certificates,CAs,and other registration authorities that verify and authenticate the validity of each party involved in a transaction over a public network is known as ____.
A) AAA server
B) AAA infrastructure
C) public cryptography
D) public key infrastructure (PKI)
Q6) Certificates are issued by a trusted third party called a(n)
Q7) Briefly describe the functions of a RADIUS client and a RADIUS server.
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Chapter 9: Secure Wireless Transmissions
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Sample Questions
Q1) SSH can even be used as a tool for secure network backups.
A)True
B)False
Q2) How does SSH port forwarding work?
Q3) What are the areas of protection provided by IPsec?
Q4) In IPsec, confidentiality is achieved through the ____ protocol.
A) Encapsulating Security Payload (ESP)
B) ISAKMP/Oakley
C) Authentication Header (AH)
D) L2TP
Q5) ____ key cryptography uses a single key to both encrypt and decrypt the document.
A) User
B) Private
C) Public
D) Known
Q6) Cisco is probably the best-known hardware-based VPN and many of their routers are designed specifically for VPNs.
A)True
B)False
Page 12
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Chapter 10: Managing the Wireless Network
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Sample Questions
Q1) The ____________________ governs the privacy of personal health information.
Q2) An SNMP ____________________ acknowledges the message with an SNMP response.
Q3) The ____ is a signal that tells the strength of the incoming (received) signal.
A) RSSI
B) HTTP
C) MIB
D) RFAP
Q4) What are the disadvantages of using a WIDS?
Q5) A(n) ____ probe uses dedicated probes for scanning the RF for attacks.
A) integrated
B) embedded
C) internal
D) overlay
Q6) A(n) ____________________ is a security management system that compiles information from a computer network or individual computer and then analyzes it to identify security vulnerabilities and attacks.
Q7) Wireless network bandwidth is less than that of a wired network.
A)True
B)False
Q8) Why was important to monitor a wired network? Page 13
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Page 14
Chapter 11: Wireless Security Policy
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Sample Questions
Q1) The risks for the least important assets should be reduced first.
A)True
B)False
Q2) What are the types of assets available at any organization?
Q3) Briefly describe the areas that should be considered when creating an incident response team (IRT).
Q4) A ____ can help to clarify some of the ethical obligations and responsibilities undertaken by users.
A) guideline
B) security policy
C) code of ethics
D) standard
Q5) A(n) ____ outlines the actions to be performed when a security breach occurs.
A) risk identification
B) threat modeling
C) risk management
D) incident response
Q6) Identifying assets is a fairly simple and quick process.
A)True
B)False
Page 15
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Chapter 12: Operational Support and Wireless Convergence
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Sample Questions
Q1) Why is operational support important for a WLAN?
Q2) WPA2 is based on the final IEEE 802.11F standard ratified in June 2004.
A)True
B)False
Q3) ____, or controlling changes made to the WLAN after installation, is another key element of operational support.
A) Controlling and Evaluation
B) Configuration management
C) Monitoring
D) Education
Q4) In a wireless LAN access control is often performed by enterprise ____.
A) wireless gateways
B) wireless probes
C) router probes
D) AP gateways
Q5) How does WPA Enterprise and WPA2 Enterprise models port-based authentication work?
Q7) What elements can be identified using WLAN monitoring tools? Page 16
Q6) The current 802.16 standard, known as ____________________, is officially IEEE 802.16-2004.
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Page 17