Network Infrastructure
Question Bank
Course Introduction
Network Infrastructure explores the foundational components and design principles that enable data communication within and between organizations. This course covers the architecture, implementation, and management of network hardware and software, including switches, routers, cabling, wireless access points, and network services such as DNS and DHCP. Students will learn about network topologies, protocols, and security measures, as well as troubleshooting and best practices for maintaining reliable, scalable, and secure network environments in both local and wide area networks.
Recommended Textbook
CWNA Guide to Wireless LANs Networking 2nd Edition by Mark Ciampa
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12 Chapters
504 Verified Questions
504 Flashcards
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Page 2
Chapter 1: Its a Wireless World
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41 Verified Questions
41 Flashcards
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Sample Questions
Q1) What are two of the unique challenges posed by wireless networks?
Answer: Unauthorized users might access the network-Because a wireless signal is not confined to the four walls of the building in which the access point (AP) is located, an unauthorized user can often pick up the signal outside the building's security perimeter. It is possible for an intruder to be lurking in the parking lot with a laptop computer and wireless NIC to intercept the signals and access the network. Individuals who actively search for wireless signals to pick up, often by just driving down the street, are participating in an activity known as war driving. Attackers might view transmitted data-In a wired network an attacker would have to gain access to the cabling infrastructure in order to attempt to look at the data that is being transmitted across the network or to gain access to a file server. With a wireless network, an attacker only has to pick up the wireless signal in order to see what is being transmitted or gain access to the network.
Q2) With ____________________ broadband, also known as WiMax, the signal is transmitted between the antennas of the buildings at speeds up to 75 Mbps and at distances up to 53 kilometers (35 miles).
Answer: Fixed
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Chapter 2: Wireless LAN Devices and Standards
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Sample Questions
Q1) If a remote wireless bridge is set to ____, it can only transmit to another bridge in root mode.
A) access point mode
B) root mode
C) non-root mode
D) repeater mode
Answer: C
Q2) Which IEEE committee establishes standards for wireless wide area networks?
A) 802.3
B) 802.11
C) 802.13
D) 802.16
Answer: D
Q3) The goal of a(n) ____________________ is to develop standard that promote their specific technology in a short period of time.
Answer: consortium
Q4) A(n) ____________________ is a small card that is functionally equivalent to a standard PCI expansion card. Answer: Mini PCI
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Chapter 3: How Wireless Works
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Sample Questions
Q1) What is polarization?
Answer: The orientation of the radio waves as they leave the antenna is known as polarization. Waves follow the plane of their electrical fields, and the electric field is parallel to the radiating elements (the antenna element is the metal part of the antenna that is doing the radiating). If the antenna is in a vertical position (perpendicular to the ground), then the polarization is said to be vertical; if it is in a horizontal position (parallel to the ground) the polarization is horizontal. Vertical polarization is typically used in wireless LANs with the dual antennas of access points pointing upward. Devices with antennas that are not polarized in the same way are not able to communicate with each other effectively. Receiving a horizontally polarized signal with a vertically polarized antenna (or vice versa) will reduce the amount of signal received.
Q2) Which of the following types of wave is imperceptible?
A) light
B) radio
C) heat
D) ether
Answer: B
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Chapter 4: IEEE 80211 Physical Layer Standards
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Sample Questions
Q1) In FHSS, the amount of time needed to move from one frequency to another is the ____ time.
A) dwell
B) switch
C) lift
D) hop
Q2) DSSS uses a bit pattern called a ____ code.
A) hopping
B) setting
C) dwelling
D) chipping
Q3) What is the Open Systems Interconnection (OSI) reference model?
Q4) When using the Shared Wireless Access Protocol, devices can be as far as 45 meters (150 feet) apart and can send and receive data at rates up to ____ Mbps.
A) 2
B) 5
C) 10
D) 14
Q5) What are the advantages to using DSSS with a chipping code?
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Chapter 5: IEEE 80211 Media Access Control and Network
Layer Standards
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Sample Questions
Q1) All frames contain the MAC address of the source and destination device, a frame sequence number, and a frame ____ used for error detection.
A) unit
B) flag
C) sum
D) check sequence
Q2) The ____ field appears first in a management frame.
A) Frame control
B) Duration
C) Destination address
D) BSSID
Q3) Which of the following describes a wireless device switching from one AP to another?
A) roaming
B) handoff
C) routing
D) redirecting
Q4) CSMA/CA reduces collisions is by using explicit frame acknowledgment. Describe how frame acknowledgment works.
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Chapter 6: Planning and Deploying a Wireless LAN
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Sample Questions
Q1) Which of the following should be included when documenting current network setup?
A) benefits of wireless technology
B) hours spent using the network by each employee
C) types of clients
D) competitors to the organization
Q2) A(n) ____ provides wireless LAN service, for free or for a fee, from a variety of public areas, including coffee shops, public libraries, and airport lounges.
A) wireless gateway
B) infrastructure network
C) hotspot
D) ad hoc network
Q3) List the seven different deployment scenarios for WLANs.
Q4) The basic steps in planning include assessing needs, weighing the benefits, and calculating the ____________________.
Q5) What are some suggestions for preparing the help desk to deal with a wireless LAN deployment?
Q6) Wireless ____________________ provide a single mechanism for managing and monitoring the wireless network.
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Chapter 7: Conducting a Site Survey
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Sample Questions
Q1) Which site survey analyzer setting sets the number of times a transmission will be repeated if an acknowledgment (ACK) frame is not returned by the destination device?
A) data rate
B) packet size
C) number of packets
D) data retries
Q2) How is RF information actually (physically) collected?
Q3) What are some of the design goals of a site survey?
Q4) What are the parts of a site survey report?
A) introduction section, graphical section
B) narrative section, graphical section
C) data section, conclusion section
D) data section, recommendation section
Q5) What is a site survey analyzer?
Q6) What should be included in a site survey report?
Q7) The process of planning a wireless LAN to meet the design goals is known as a(n)
Q8) What are some of the times at which a site survey should be conducted?
Q9) What special considerations exist for outdoor site surveys?
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Chapter 8: Wireless LAN Security and Vulnerabilities
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Sample Questions
Q1) A standard personal computer can easily create over ____ possible password combinations per second.
A) 100
B) 1,000
C) 1,000,000
D) 1,000,000,000
Q2) A ____ is not malicious but often seeks to expose security flaws.
A) cracker
B) script kiddie
C) spy
D) hacker
Q3) On wireless networks, ____ attacks are commonly done by attackers setting up a "fake" access point.
A) spoof
B) weak key
C) DoS
D) man-in-the-middle
Q4) The term _________________________ is frequently used to describe the tasks of guarding information that is in a digital format.
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Chapter 9: Implementing Wireless Lan Security
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Sample Questions
Q1) The ____________________ security model is designed for single users or small office home office (SOHO) settings of generally 10 or fewer wireless devices.
Q2) What are the ways in which captive portals are used?
Q3) The block cipher used in 802.11i is the Data Encryption Standard (DES).
A)True
B)False
Q4) Describe pre-shared key authentication.
Q5) Describe Advanced Encryption Standard (AES).
Q6) WEP2 attempted to overcome the limitations of WEP by adding two new security enhancements.
A)True
B)False
Q7) When implementing an interim security model, most vendors have the option of a 128-bit WEP key, which can be created by entering 16 ____ characters. This provides the most secure option.
A) ASCII
B) ciphered
C) hexadecimal
D) plaintext
11
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Chapter 10: Managing a Wireless LAN
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Sample Questions
Q1) A wireless network is a static system.
A)True
B)False
Q2) Which type of RF loss is caused by the equipment itself, not external objects?
A) Refraction
B) Scattering
C) Voltage Standing Wave Ratio
D) Absorption
Q3) List and describe three RF tuning settings.
Q4) Describe a sectorized antenna.
Q5) Although data from the access point and devices can be beneficial, there are drawbacks to relying solely on these sources of information. What are the drawbacks?
Q6) What tool(s) are used most often as "standard" network monitoring tools?
A) AP Monitor and Simple Network Management Protocol
B) WLAN Logger and Remote Monitoring
C) Simple Network Management Protocol and Remote Monitoring
D) All of the above
Q7) In order to use SNMP, a software ____________________ is loaded onto each network device that will be managed using SNMP.
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Chapter 11: Network Settings and Wireless LAN
Troubleshooting
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Sample Questions
Q1) Some computer viruses are known to cause ____.
A) duplicate SSID
B) incorrect MAC addresses
C) WLAN interference
D) intermittent connectivity problems for wireless connections
Q2) What is the purpose of the Ethernet Timeout setting on an access point?
Q3) What are the three different frame formats?
Q4) If the wireless device is configured for DHCP yet no DHCP server is active, then Windows assigns a(n) ____________________ IP Addressing address that begins with the IP range 169.254.x.x.
Q5) Describe the LED indicator lights that appear on an AP.
Q6) In Mobile IP what are the home and foreign agents?
Q7) The default protocol of older Novell Net-Ware LANs is ____.
A) TCP
B) UDP
C) IPX
D) SPM
Q8) How would you delete the current access point configuration and return all of the settings to the factory default settings on a Cisco Aironet AP? Page 13
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Page 14
Chapter 12: Personal, Metropolitan, and Wide Area Wireless
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Sample Questions
Q1) Mode ____ of IEEE 802.15.3 provides protection using digital certificates.
A) 0
B) 1
C) 2
D) 3
Q2) What is a piconet?
Q3) The advantage of ____________________ networking systems is that devices configure themselves and are intelligent.
Q4) The transmission speed of wireless personal area networks is higher than the other types of networks.
A)True
B)False
Q5) A group of piconets in which connections exist between different piconets is called a(n) ____________________.
Q6) If multiple piconets cover the same area, a Bluetooth device can be a member in two or more overlaying piconets.
A)True
B)False
Q7) What are the two different types of RFID tags?
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