Chapter 7 A+

Pataasin ang iyong marka sa homework at exams ngayon gamit ang Quizwiz!

Which of the following are characteristics of Bluetooth? (Select TWO.)

-2.4 Ghz radio wireless -Ad hoc connections

Which IEEE wireless standards specify transmission speeds up to 54 Mbps? (select two)

-802.11a -802.11g

A portable computer connected to a printer with an infrared interface works fine inside your office. However, when you go outside, it works sporadically. Which of the following would best resolve this issue? (Select TWO).

-Block direct and reflected sunlight from the pathway between the PC and the printer -Move the printer closer to the computer

Drag the wireless networking technology on the left to its associated transmission distance limitation on the right. Each technology can be used more than once. -Up to 100 meters for Class 1 devices -Up to 30 meters in areas without interference -Up to 10 meters for Class 2 devices

-Bluetooth -Infrared -Bluetooth

Which of the following are atenna types that are commonly used in wireless networks? (Select two).

-Directional antenna -Omnidirectional antenna

The 802.11ac wireless networking standard provides increased bandwidth and communication speeds by using which of the following technologies? (Select TWO).

-MU-MIMO to allow multiple users to use the same channel. -Channel bonding to combine more channels in the 5 Ghz band to allow for up to 160-MHz channels.

Which of the following locations will contribute the greatest amount of interference for a wireless access point? (Select TWO.)

-Near backup generators -Near cordless phones

Which of the following are characteristics of the 802.11g wireless standard?

-Operates in the 2.4 ghz range -Backwards compatible with 802.11b devices -Maximum bandwidth of 54 mbps

What are two major concerns regarding IoT devices? (Select TWO.)

-Privacy -Hacking

Match each smart device with its description. -Learns from your habits and schedule, allows you to control the climate in your home remotely, shows you energy consumption in real-time, and adjusts itself depending on ambient conditions. -Can change colors, track motion, stream audio over blue-tooth, and double as a connected camera, but its only smart when turned on. It doesn't work when turned off. -Allows you to control hardwired lights, ceiling fans, fireplaces, small appliances, and garbage disposals. -Easy solution for making small appliances, such as lamps, coffee makers, and toasters, smart. -Uses a wireless protocol and a cryptographic key to execute the authorization process. It can also monitor access and send alerts related to the status of the device. -Uses an RF transmitter. May include such features as motion detection, scheduled recording, remote viewing, and automatic cloud storage. -Uses voice recognition software and activates through a wake word or hot word.

-Thermostat -Bulb -Switch -Plug -Door lock -Speaker/digital assistant

(7.4) What are the two protocols used most often with IoT devices? (Select TWO.)

-Z-Wave -Zigbee

What is the maximum range of the Bluetooth 2.0 specification for class 1 devices?

100 M

Which data transmission rate is defined by the IEEE 802.11b wireless standard?

11 Mbps

Which frequencies does Zigbee operate on?

2.4 Ghz, 900 MHz, and 868 MHz

What is the maximum number of nodes Z-Wave allows on its mesh network?

232

Which of the following is the maximum transmission speed for Bluetooth v3 and v4 devices?

24 Mbps

(7.1) Which wireless standard can stream data at a rate of up to 54 Mbps using a frequency of 5 Ghz?

802.11a

A customer is experiencing a sporadic interruption of their wi-fi network in one area of their building. A technician investigates and discovers signal interference caused by a microwave oven. THe computer approves replacing the wireless access point that covers the area, but asks that the wireless speed also be increased. Which of the following WI-fi standards should the replacement device support to best fulfill the customers needs?

802.11ac

Which of the following wireless networking standards uses a frequency of 5 Ghz and supports transmission speeds up to 1.3 Gbps?

802.11ac

You are designing a wireless network for a client. Your client needs the network to support a data rate of at least 150 Mbps. In addition, the client already has a wireless telephone system installed that operates 2.4 GHz. Which 802.11 standard will work best in this situation?

802.11n

You have been contacted by OsCorp to recommended a wireless internet solution. The wireless strategy must support a transmission range of 150 feet, use a frequency range of 2.4 Ghz, and provide the highest possible transmission speeds. Which of the following solutions would you recommenced?

802.11n

A technician is tasked with preparing a conference room so that at least 20 guests will be able to wirelessly connect laptop computers to the company network. Which of the following network devices would be the best choice for this connectivity?

Access point

Which type of configuration would you use if you wanted to deploy 802.11n technology to communicate directly between two computers using a wireless connection?

Ad hoc

(7.5) Portable devices have a software-controlled switch that disables all wireless functionality. What is the name of this software controlled switch?

Airplane mode

You need a type of wireless connection that can transfer data between your phone, PDA, and laptop. You are transferring sensitive information. Which would be the best choice?

Bluetooth

You want to use a wireless keyboard and mouse with your laptop computer. Which method should you choose?

Bluetooth

A SOHO customer finds that their VoIP conversations frequently break up and become unintelligible. This happens most often when one person in the office streams video from the internet. Which of the following configuration changes on the SOHO router is most likely to improve VoIP performance?

Change QoS settings to give VoIP traffic more priority.

A technician is installing a new SOHO wireless router. Which of the following is the FIRST thing the technician should do to secure the router?

Change the router's default password.

A technician receives notification from a SOHO router manufacturer of a specific vulnerability that allows attackers to exploit SNMP traps to take over the router. The technician verifies the settings outlined in the notification. Which of the following actions should the technician take next?

Check for and apply firmware updates.

One of your customers wants to configure a small network in his home. The home has three floors, and there are computers on each floor. This customer needs to share files between computers, print to a centrally located printer, and have access to the internet. Which of the following print solutions would best meet this client's needs?

Configure a Wi-fi infrastructure network.

A technician is replacing a SOHO router and has configured DHCP to assign private IP addresses to hosts on the local network. These hosts can communicate with each other, but users can't browse the internet. Which of the following changes to the SOHO router is most likely to restore internet connectivity?

Configure the SOHO router for NAT.

Which of the following is not an example of wireless networking technologies?

DSL

You are troubleshooting a client connectivity problem on an Ethernet network. The client system has intermittent connectivity to the network. You discover that the UTP patch cable is run 75 feet from the wall outlet, passes through the ceiling and over several florescent light fixtures before reaching the client system. Which of the following is the most likely cause of the connectivity problem?

EMI interference

A technician is installing a new SOHO wireless router in a home office. The customer wants to secure the wireless network so only a smartphone, tablet, and laptop can connect. Which of the following router settings should the technician change?

Enable MAC filtering

A technician is installing a SOHO router at an after-school community center. The customer would like to keep children from accessing inappropriate while browsing the web/ Which of the following actions would help accomplish this goal?

Enable content filtering

A user has purchased an external speaker to play music from a mobile device over a wireless connection. Which of the following actions is most likely needed for speaker connectivity?

Enable pairing

(7.3) You have been asked to help a small office with a limited budget set up and configure a windows network. There are only five computers in this office. In addition to the ability to share network resources, security is a top priority. Which of the following is the BEST course of action in this situation?

Install a workgroup to allow each device to control what is shared and with whom.

A user calls to report that she is experiencing intermittent problems while accessing the wireless network from her laptop computer. She can access the network from her usual office, but today, she is trying to access the wireless network from a conference room, which is across the hall and next to the elevator. Which of the following is the most likely cause of her connectivity problems?

Interference is affecting the wireless signal

You are an IT technician for your company. Your boss has asked you to set up and configure a wireless network to service all of the conference rooms. Which of the following features lets you allow or reject client connections by hardware address?

MAC address filtering

(7.2) A user pays for a retail purchase by placing a smart phone next to the merchant's reader. Which of the following mobile device connections is being used?

NFC

Which of the following wireless communication techniques can be described as follows? -Has a very limited transmission range of less than two miles -Used with credit cards and passports -Slower than other wireless technologies -Constantly emits a signal.

NFC

A technician is installing a network-enabled smart home control system in a SOHO. To access the system from the internet, which of the following configurations is most likely required on the SOHO router?

Port forwarding

Which of the following is used on a wireless network to identify the network name?

SSID

A user on your network has been moved to another office down the hall. after the move, she calls you complaining that she has only occasional network access through her wireless connection. Which of the following is most likely the cause of the problem?

The client system has moved too far away from the access point.

A user calls to report that she is experiencing intermittent problems while accessing the wireless network from her laptop computer. While talking to her, you discover that she is trying to work from the break room two floors above the floor where she normally works. Which of the following is the most likely cause of her connectivity problems?

The user is out of the effective range of the wireless access point on her floor

While configuring a wireless access point device, a technician is presented with several security mode options. Which of the following options will provide the most secure access?

WPA2 and AES

Which of the following is true when the DHCP setting is disabled in a wireless network?

Wireless clients must use a static IP address within the correct IP address range to connect to the network.


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