IT Infrastructure
Question Bank
Course Introduction
IT Infrastructure provides a comprehensive overview of the foundational technologies and frameworks that support modern information systems within organizations. The course explores the design, implementation, and management of core components including hardware, software, networks, data centers, and cloud services. Students learn about infrastructure scalability, security, virtualization, and disaster recovery strategies, gaining insights into both on-premises and cloud-based solutions. Emphasis is placed on aligning IT infrastructure with business goals, industry best practices, and emerging trends, preparing students to assess, manage, and optimize IT environments in a variety of settings.
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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Chapter 1: Its a Wireless World
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41 Verified Questions
41 Flashcards
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Sample Questions
Q1) What is the maximum transmission distance for FSO?
A) 4 miles
B) 6.4 miles
C) 10 miles
D) 100 miles
Answer: A
Q2) What is the range of transmission for a WPAN?
A) 3 feet
B) 10 feet
C) 14 feet
D) 22 feet
Answer: B
Q3) A cold site is a fully functional office space generally run by a commercial disaster recovery service that allows a business to continue computer and network operations to maintain business continuity.
A)True
B)False
Answer: False
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Chapter 2: Wireless LAN Devices and Standards
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41 Verified Questions
41 Flashcards
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Sample Questions
Q1) Most bridges have what is known as ____ that minimizes the spread of the signal so that it can reach farther distances.
A) delay spread
B) interspersed communications
C) scheduled delays
D) multipoint scheduling
Answer: A
Q2) What is a disadvantage of standards?
A) reduced competition
B) devices produced by different vendors may not interoperate
C) higher prices
D) they can open domestic markets in larger countries to overseas competition
Answer: D
Q3) The IEEE 802.11 standard outlines the use of ____ transmissions for WLANs.
A) diffused infrared
B) directed infrared
C) radio wave
D) gallium arsenide
Answer: A
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Page 4
Chapter 3: How Wireless Works
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41 Flashcards
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Sample Questions
Q1) A(n) ____________________ signal has numerous starts and stops throughout the signal stream.
Answer: digital
Q2) What is the most common type of antenna for a WLAN?
Answer: The most common type of antenna for a WLAN is an omni-directional antenna, also known as a dipole antenna. An omni-directional antenna radiates its signal out in all directions equally. If a standard dipole antenna is placed in the center of Floor 2 of a three-story building, most of its signal will be radiated along the floor of Floor 2. Some of the signal will reach Floor 1 and Floor 3 rooms below and above the AP. If a high-gain dipole antenna is placed in the same position, however, the signal is "flatter"(more horizontal) and less vertical. That is ,more of the rooms on Floor 2 will receive the signal but less of it radiates to Floor 1 or Floor 3.
Q3) RF power gain and loss on a relative scale are measured in ____________________ instead of mW.
Answer: decibels
dB
Q4) ____________________ is defined as the positive difference in amplitude between two signals.
Answer: Gain
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Chapter 4: IEEE 80211 Physical Layer Standards
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41 Flashcards
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Sample Questions
Q1) 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
Q2) There are two disadvantages to using U-NII. What are they?
Q3) What is the Open Systems Interconnection (OSI) reference model?
Q4) ____ is not part of a frame.
A) Length
B) Parity
C) Channel
D) Data
Q5) The ____ field of an 802.11a frame consists of 10 repetitions of a short training sequence signal and two repetitions of a long training sequence signal.
A) Rate
B) Service
C) Synchronization
D) Parity
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Chapter 5: IEEE 80211 Media Access Control and Network
Layer Standards
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41 Verified Questions
41 Flashcards
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Sample Questions
Q1) ____________________ involves dividing the data to be transmitted from one large frame into several smaller ones.
Q2) A BSS is ____.
A) a group of wireless devices that is served by a single access point
B) a unique identifier
C) a geographical area where wireless devices reside
D) two or more networks that are connected through a common distribution system
Q3) What is a Basic Service Set?
Q4) When an AP accepts or rejects a wireless device it sends a(n) ____ frame.
A) association request
B) association response
C) disassociation
D) reassociation
Q5) Describe power management for an ad hoc configuration.
Q6) A home agent is a forwarding mechanism that keeps track of where the mobile computer is located.
A)True
B)False
Q7) A(n) ____________________ Service Set is a wireless network that does not use an access point. Page 7
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Page 8
Chapter 6: Planning and Deploying a Wireless LAN
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41 Verified Questions
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Sample Questions
Q1) What is the single most important tool in any business?
A) mainframe
B) database
C) information
D) personal networked computer
Q2) What are thin access points? Describe some of the benefits of using them.
Q3) 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
Q4) What information should be included in the current network document?
Q5) Channel ____________________ calls for adjacent access points to use nonoverlapping channels so that the access point using one channel will not interfere with its neighbor.
Q6) List the seven different deployment scenarios for WLANs.
Q7) List and describe two soft benefits of WLANs.
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Q8) What is the final step in the wireless LAN model developed by Intel Corporation?
Chapter 7: Conducting a Site Survey
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Sample Questions
Q1) What is the most basic tool or component involved in a site survey?
A) access point
B) notebook computer
C) PDA
D) site survey analyzer
Q2) 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
Q3) The coverage ____________________ is the area in which the signal can be received from the AP.
Q4) What is packet throughput? How can this information be collected if the site survey software does not calculate throughput?
Q5) What are the steps involved in gathering data for a site survey?
Q6) In addition to access points, what wireless tool(s) are required for a site survey?
Q7) How is RF information actually (physically) collected?
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Chapter 8: Wireless LAN Security and Vulnerabilities
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Sample Questions
Q1) Which aspect of information security does WEP protect?
A) availability
B) integrity
C) confidentiality
D) All of the above
Q2) The term _________________________ is frequently used to describe the tasks of guarding information that is in a digital format.
Q3) ____ was initially founded by the U.S. Department of Defense and is now part of the Software Engineering Institute at Carnegie Mellon University.
A) Computer Emergency Response Team Coordination Center (CERT/CC)
B) InfraGard
C) National Security Institute (NSI)
D) SysAdmin, Audit, Network, Security (SANS) Institute
Q4) What is a dictionary attack?
Q5) In a brute force attack, what key combination would follow 00001?
A) 00000
B) 00002
C) 00010
D) 10000
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Chapter 9: Implementing Wireless Lan Security
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Sample Questions
Q1) What feature of IEEE 802.11i allows a device to become authenticated to an AP before moving to it?
A) key caching
B) port security
C) pre-authentication
D) message passing
Q2) ____________________ was developed by the Massachusetts Institute of Technology (MIT) and used to verify the identity of network users.
Q3) Describe Advanced Encryption Standard (AES).
Q4) The ____ wireless security standard provides a low level of security.
A) Dynamic WEP
B) WEP
C) WEP2
D) All of the above
Q5) A network supporting the 802.1x standard consists of three elements. Identify and describe each one.
Q6) The block cipher used in 802.11i is the Data Encryption Standard (DES).
A)True
B)False
Page 12
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Chapter 10: Managing a Wireless LAN
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Sample Questions
Q1) It is important for wireless system administrators to maintain a(n) ____ log that contains a record of all problems, solutions, and configuration changes.
A) manual
B) event
C) network
D) AP
Q2) What is another name for propagation loss?
A) transmission loss
B) effective loss
C) free space loss
D) signal loss
Q3) For a proper WLAN performance, the link budget must be ____ dB.
A) greater than zero
B) greater than five
C) greater than ten
D) less than ten
Q4) Describe a sectorized antenna.
Q5) A wireless network is a static system.
A)True
B)False
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Chapter 11: Network Settings and Wireless LAN
Troubleshooting
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Sample Questions
Q1) When scanning, the wireless network adapter sends a series of ____________________ frames and the APs within range respond with a Beacon frame that contains the capabilities of the wireless AP, such as the supported speeds, SSID, and security options.
Q2) Dividing a wired network into ____ makes network management easier and decreases the spread of broadcast packets throughout the network.
A) segments
B) subnets
C) systems
D) routes
Q3) The ____ layer is an attractive place to focus attention on improving the coexistence between Bluetooth and WLANs because it is where such techniques as Carrier Sense Multiple Access/Collision Avoidance (CSMA/ CA) and data rates are determined.
A) RF
B) software
C) PHY
D) MAC
Q4) List some strategies for making IEEE 802.11b/g and Bluetooth devices work together.
Page 14
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Chapter 12: Personal, Metropolitan, and Wide Area Wireless
Networks
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Sample Questions
Q1) What is the main drawback of 802.15.1 technology?
A) cost
B) speed
C) reliability
D) All of the above
Q2) ____________________ RFID tags do not have their own power supply. Instead, the tiny electrical current induced in the antenna by the incoming signal from the transceiver provides enough power for the tag to send a response.
Q3) Describe IrDA.
Q4) Describe wireless personal area networks.
Q5) There are several advantages of free space optics (FSO) compared to fiber optic and RF systems. List and describe them.
Q6) Mode ____ of IEEE 802.15.3 provides protection using digital certificates.
A) 0
B) 1
C) 2
D) 3
15
Q7) There are several significant differences between 802.15.3 and 802.15.1 (Bluetooth). What are they?
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