Post Assessment ITSP 216

What is the data rate of the 802.11ac standard?

1.73 gbps

Which of the following frequency bands provides the best wall penetration?

2.4

Which Wi-Fi frequency band can interfere by high-powered radar devices near an airport or military installation?

5 GHz

Which of these is the standard throughput limit of the 802.11n standard?

600 Mbps

Which of these channels is not recommended for avoiding co-channel and adjacent channel interference (ACI) in the 2.4 gigahertz (GHz) band?

8

Which of the following represents the entire range of access point (AP) data rates?

802.11 to 802.11ac

Which of the following Institute of Electrical and Electronics Engineers (IEEE) standards governs power over ethernet (PoE) devices that require more than 12.95 W?

802.11at

Which of the following amendments to the Institute of Electrical and Electronics Engineers (IEEE) Wi-Fi standard deprecated the use of Wired Equivalent Privacy (WEP) technology?

802.11i

Which of the following Institute of Electrical and Electronics Engineers (IEEE) standards governs band selection of wireless devices?

802.11k

Which of the following 802.11 amendments provides the option for the access point (AP) to not respond to Internet Control Message Protocol (ICMP) requests that would allow the discovery of the device from outside the wireless local area network (WLAN)?

802.11w

Which of the following standards do Internet of Things (IoT) devices use as Open Systems Interconnection (OSI) Layer 1 and Layer 2 to specify encryption associated with Layer 2 Media Access Control (MAC) frames for enabling the secure transmission of broadcasts?

802.15.4

Which of the following statements is not true?

A splitter PoE takes the 48 VDC from the PSE and converts it into an AC voltage compatible with the AP.

Which of the following is most similar to an access point (AP)?

ASIC

Which of the following operating systems (OSs) is the most widely used OS for non-Apple mobile devices?

Android

Which of the following is a major difference between Android and Apple's iPhone Operating System (iOS)?

Android is an open-source OS whereas iOS is not.

Which of the following phenomena is the decrease in amplitude or oscillation of a transmitted signal?

Attenuation

Which of these is the process of validating a user who presents a credential proving their identity?

Authentication

What do the initials of the AAA framework stand for?

Authentication, Authorization, and Accounting

Why is co-channel interference (CCI) rare in the 5 gigahertz (GHz) frequency band?

Because of its reduced signal range

What cipher mechanisms does Advanced Encryption Standard (AES) use that differentiates it from those of Wired Equivalent Privacy (WEP) and Wi-Fi Protected Access (WPA)?

Block-cipher

Which of these is not a graphical user interface (GUI) version of Linux?

Bodleian

Which of the following devices connects points between two physical networks?

Bridge

Which is the following is the most important default setting that access point (AP) vendors recommend to change?

Change the admin password.

What do the initials of CPE stand in the context of the Internet of Things (IoT)?

Customer-provided equipment

Which of the following is the default Internet Protocol (IP) configuration of access points (APs)?

DHCP is enabled

Which of the following antenna types increases gain in one direction while having the added benefit of rejecting signals in the opposite direction?

Directional antenna

In most cases, the increasing power output of an access point (AP) beyond the Federal Communications Commission (FCC) specification can create more radio frequency (RF) interference issues than it might resolve. What would be a better way to resolve the problem?

Employ additional APs and decrease the output power of each device.

Which of the following terms characterizes a typical Internet of Things (IoT) gateway?

FFD

Which of these is a type of point-to-point communication that allows simultaneous two-way communication?

Full-duplex

Which of the following operating systems (OSs) contains configuration and setup tools in System Preferences?

MacOS

Which of the following procedures is recommended for selecting channels in an 802.11 2.4 gigahertz (GHz) multi-access point (AP) environment?

Manually select non-overlapping channels with the least RF activity.

Which of the following devices are examples of non-Wi-Fi devices that can cause interference and affect Wi-Fi connectivity?

Manufacturing or industrial equipment Bluetooth device Microwave oven Cordless telephone Radar system

What enables an access point (AP) to convert a private Class C address into a public one?

NAT

What does the abbreviation PoE stand for?

Power over Ethernet

Which of the following contains the service set identifier (SSID) of the access point (AP) it is trying to locate?

Probe request frame

Which of the following is of primary importance in determining how well a given access point (AP) might handle multiple services for multiple devices?

Processor

Which of these has an impact on Wi-Fi performance apart from configuration and interference?

RSSI

What is the full form of RFID?

Radio Frequency Identification

Which of these is the generic term for the first step in identifying connectivity problems?

Reachability

What is the net effect on the throughput of using an extender or repeater in a wireless local area network (WLAN)?

Reduced throughput by a factor of two

Which of the following terms states the difference between a signal measured at the transmitter and the same signal measured at the receiver?

Relative power

Which of these is the most common factor in signal attenuation and loss?

Scattering

What is SSID an abbreviation of?

Service set identifier

What does the figure below represent?

Six deployed APs with a non-overlapping channel plan

What does the following figure depict?

Smart home

Which of the following unique authentication identifiers includes smartcard as an example?

Something you have

What type of tool is depicted in the figure below?

Spectrum analyzer

Which of the following tools is a good tool for identifying connectivity and performance problems, and is widely available on the web and as a downloadable app for all types of devices and operating systems (OSs)?

Speedtest by Ookla

What does the figure below represent?

Splitter PoE

How wavelength is measured?

The distance from peak to peak of contiguous waves

Which of the following features differentiates Android and iPhone Operating System (iOS) from each other?

They allow multitasking.

Which of the following components is essential to radio communications, regardless of frequency band?

Transmission and reception of electromagnetic energy

What is the primary concern with the implementation of numerous IoT devices in smart homes?

Vulnerability to security breaches

Which of the following security protocols are currently deprecated and therefore not recommended to use?

WEP MAC filtering SSID

What is the basic unit used to measure the amplitude of a wave?

Watt

Which of the following is not addressed by accounting in the authentication, authorization, and accounting (AAA) security model?

Why

Which of the following operating systems (OSs) is not ultimately derived from Unix?

Windows

Which command is being run in the figure below?

arp

What is the name of the entry point for the service provider's network connection?

demarc

Which of the following commands is a good first step in identifying the source of a global connectivity issue on the local wireless local area network (WLAN)?

ipconfig