101 - Week 7

When using RFID, what is an ARPT (Active Reader Passive Tag)? - It is a battery-powered tag actively transmits its credentials at regular time intervals, which can be read remotely. -It is a tag that requires an active reader, but still contains a battery in the tag. -It is a tag that is activated by an active reader, and uses power from the reader's radio to power its transmission. - It is a tag that can be read remotely up to a distance of 50 m, but requires a powerful active reader.

It is a tag that is activated by an active reader, and uses power from the reader's radio to power its transmission.

In an 802.11 data frame, what is the maximum amount of data that can be sent? 1500 bytes 2312 bytes 4582 bytes 9000 bytes

2312 bytes

802.11ac Wave 2 devices can theoretically support how much maximum throughput? 600 Mbps 1.3 Gbps 3.47 Gbps 6.93 Gbps

3.47 Gbps

In an 802.11 data frame, what is the size of the frame check sequence field? 2 bytes 4 bytes 6 bytes 8 bytes

6 bytes

The wireless spectrum, as defined by the FCC, spans between which two frequencies? 9 kHz and 300 GHz 125 kHz and 150 GHz 3 kHz and 500 GHz 3 MHz and 300 GHz

9 kHz and 300 GHz

Which Bluetooth power class allows for a maximum power output of 100 mW and a range of up to 100 m? Class 1 Class 2 Class A Class X

Class 1

Due to many vulnerabilities and a short key length, the WPA security standard was replaced with WEP. True False

False

Infrared technology utilizes an LED that emits light with shorter wavelengths than red light. True False

False

The LLC sublayer is primarily concerned with managing MAC addresses in message frames. True False

False

Z-Wave transmissions have a range of up to 50m per hop, and can tolerate up to 8 hops through repeaters. True False

False

If you need to evaluate Wi-Fi network availability as well as optimize Wi-Fi signal settings and identify security threats, what tool should you use? spectrum analyzer protocol analyzer Wi-Fi analyzer air scanner

Wi-Fi analyzer

What 802.11 frame type is involved in association and reassociation, including probe and beacon frames? management frames control frames data frames extended frames

management frames

What type of device can be used to assess the quality of a wireless signal? Wi-Fi analyzer spectrum analyzer channel scanner frequency hopper

spectrum analyzer

What is the purpose of the Layer 2 LLC sublayer? -It is used to handle multiplexing, flow and error control, and reliability. -It is used to manage MAC addresses in message frames. -It performs management of the physical layer's modulation techniques. -It is used to manage low-level encryption on a network.

It is used to handle multiplexing, flow and error control, and reliability.

All wireless signals are carried through the air by electromagnetic waves. True False

True

You are troubleshooting a client's wireless networking issue. Which of the following will prevent the client from connecting to the network? - The client has a wireless profile configured for the "campus" SSID, but the access point is broadcasting the "CAMPUS" SSID. - The client is using an 802.11n wireless adapter, but the access point only supports up to 802.11g. - The client is using a network adapter with outdated firmware. - The client is only able to get line of sight with an omnidirectional antenna.

The client has a wireless profile configured for the "campus" SSID, but the access point is broadcasting the "CAMPUS" SSID.

How does the 802.11 data frame indicate how a large packet should be fragmented? - It uses the preamble header to estimate the ideal packet size. -The frame check sequence dictates the calculated packet size. - The sequence control field indicates how packets will be subdivided. - The duration field determines how long the station can transmit a packet, which then determines how it is divided.

The sequence control field indicates how packets will be subdivided.

Diffraction has what affect on a wireless signal's propagation? -The signal is redirected into multiple directions. - The signal is split into secondary waves that continue in the direction in which they split. -The signal is returned back towards the source of the original signal. -The signal is completely absorbed by the diffracting material.

The signal is split into secondary waves that continue in the direction in which they split.

What special signal is issued periodically from an AP and contains the network transmission rate and service set identifier (SSID), as well as other information needed for a computer to associate with the AP? broadcast frame beacon frame announcement packet alert message

beacon frame

In Linux, what command can be used for viewing and setting wireless interface parameters? ifconfig iwconfig wlanconf wifid

iwconfig