EMT Practice Test

1. Question Content...

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Question1: As part of a pre-deployment manual RF site survey, your manager has assigned to you the task of documenting security and interference details about existing WLANs in the building. What is the best tool for locating and collecting information about existing APs in the building?

Question2: Given: You are performing a site survey using software that simulates RF behavior in a defined environment. It uses a floor plan and materials information for its calculations.
What kind of site survey is performed using this method?

Question3: What wireless network access technology is used to cover a city with 802.11 or another wireless networking technology?

Question4: ABC Manufacturing currently has 35 access points throughout their main facility, and each Friday afternoon two administrators walk the premises with spectrum and protocol analyzers to detect unauthorized devices and network activity. You have noted several problems with this approach. To address the inefficiencies with this approach and to provide the most robust preventative security, you have set aside a portion of the department's budget to install a ________.

Question5: What type of protection does a lightning arrestor provide to a Wi-Fi system?

Question6: What two factors are used to calculate the wavelength of an RF wave? (Choose 2)

Question7: The Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) protocol is necessary in Wi-Fi networks because ___________.

Question8: Which Wi-Fi vertical market applications are regulated by a government or industry group for security compliance? (Choose 2)

Question9: Manufacturers design hardware used for wireless LANs based on a common set of criteria or rules known as standards. The name of the organization responsible for creating 802.11 WLAN standards is what?

Question10: What tool is best suited for locating and identifying sources of RF interference, such as microwave ovens?

Question11: Given: Several users are required to transfer files among themselves in a conference room. No APs are available for connections to the network infrastructure. All users have laptops with 802.11 wireless adapters installed and operational.
What can you implement to allow users to transfer files when 802.11 adapters are available, but no wireless LAN infrastructure is accessible?

Question12: Where is the use of a Wireless Internet Service Provider (WISP) most appropriate?

Question13: Wi-Fi certified network devices can operate in what frequency band(s)?

Question14: Your customer has asked you to recommend a Wi-Fi solution that includes the following features:
1. Role Based Access Control
2. Stateful Firewall
3. Quality of Service
What device type can perform all of these functions?

Question15: Identify the strongest passphrase-based security mechanism for 802.11 wireless networks.

Question16: As an RF signal propagates, it reflects off an object. The reflected signal and the signal following a direct path arrive at the receiver at different points in time. What is the term used to describe this RF behavior?

Question17: Given: In order to reduce travel-related expenses, your CFO has enacted a company policy that eliminates cellular data connectivity for traveling users. Many of your users must connect to the office network during travel, but you have security concerns about wireless hot-spot usage.
To address these concerns, what advice should you give to your traveling users with regard to wireless hot-spot usage? (Choose 2)

Question18: Given: To manage increasing enrollment and budget constraints, a school has temporarily parked classroom trailers near the main building on its campus. Students and teachers in the trailers are using desktop computers and have an occasional need to connect to the main building's network for web browsing. The main building has an existing 802.11g Wi-Fi network.
What would be the most cost-effective and easily-deployable solution to allow the desktop computers in the temporary classrooms to access the main building's network?

Question19: ABC Company has recently deployed a Wi-Fi network in their corporate facility. After deployment, they considered a solution for monitoring and enforcing their wireless security policy. What type of system can perform this task?

Question20: When implementing a wireless LAN, what is the area covered by an AP and usable by a client station called?

Question21: dBi is a(n) ___________ measurement of gain introduced by ___________?

Question22: What statement accurately describes an advantage of manual RF site surveys over predictive site surveys?

Question23: Which Wi-Fi technology simultaneously uses multiple radio chains to transmit or receive data?

Question24: A WLAN bridge is best-suited for which scenario?

Question25: After installing a wireless client adapter into a laptop computer, what software is required to use the adapter and to configure it to connect to a Wi-Fi network? (Choose 2)

Question26: ABC Corporation has decided to deploy their first Wi-Fi network in their corporate headquarters. ABC prepared for adding a Wi-Fi network by installing PoE-capable Ethernet switches in their wiring closets.
What type of PoE implementation is this?

Question27: Given: In Single-Channel Architecture (SCA) systems, multiple access points can use the same BSSID.
This feature allows for the creation of a network-wide virtual access point that can be applied across multiple physical access points operating on the same channel.
What benefit does this solution offer?

Question28: How do Wi-Fi routers differ from Wi-Fi access points?

Question29: What unit of measurement is used to measure the power difference between two RF signals?

Question30: Given: ABC Company has asked you to recommend a solution that will provide wireless connectivity for desktop computers at various locations in their warehouse. The locations of the desktop computers prevent the use of Cat5e cabling.
What type of client adapter would provide Wi-Fi connectivity to these desktop computers?

Question31: Which one of the following adjustments can most benefit a high density environment?

Question32: Given: Your branch office AP is configured with WPA2-Personal, and you have decided that CWTS4me is a good passphrase. You have also configured your laptop with the same passphrase, which is used by the access point to validate the laptop's identity when it attempts to connect to the WLAN.
What is this process of identity validation called?

Question33: 802.11a operates in the __________ GHz frequency range and uses the ___________ frequency bands.

Question34: After successfully connecting to the Wi-Fi network in your hotel room, you launch a web browser on your laptop. Instead of opening your homepage, it directs you to a hotel-branded page that asks for your name, room number, and a secret key. What has most likely happened?

Question35: What is a difference between an Infrastructure Basic Service Set (BSS) network and an Ad Hoc network?

Question36: Exhibit:

In what type of Wi-Fi deployment is an antenna mounted using a pole mounting kit, as shown in the exhibit?

Question37: As a general rule, where is the most appropriate location to install a dipole antenna?

Question38: Select the statement that correctly describes the Wi-Fi Alliance's primary role in the WLAN industry.

Question39: Which scenario represents an improper installation for an AP with low-gain omnidirectional antennas?

Question40: What symptom would indicate the presence of a hidden node in a Wi-Fi network?

Question41: Virtual Private Network (VPN) solutions are often used in conjunction with Wi-Fi networks for what purpose?

Question42: The two most common modes of WLAN discovery are passive scanning, where a client station listens for
_________ frames, and active scanning, where a client sends and receives _________ frames.

Question43: Given: You are recommending an AP for use in a warehouse environment. Some APs will require directional antennas and others will use dipole antennas.
What feature must be supported by the APs in this installation?

Question44: In what situation is an RF site survey LEAST needed?

Question45: What is one difference between autonomous access points and controller-based access points?

Question46: Given: In ABC Company's branch office, there are three 802.11n access points serving 20 Wi-Fi clients for email, web browsing, and occasional file sharing. Some users sit at a picnic table outside the building during lunchtime and have complained that the network is slow and connectivity is intermittent during this period of time.
What is the most likely cause of the slow and intermittent connectivity?

Question47: ABC Company is comprised of four departments: sales, marketing, engineering, and accounting. The company would like to separate the users on the WLAN so that users from different departments have access to different services on the network. To implement this strategy, you recommend a WLAN controller that supports _________.

Question48: In preparation for site surveys, your company is creating a questionnaire that will help you understand your customer's client connectivity requirements. What question is NOT appropriate for your company's pre- survey questionnaire?

Question49: As a new salesperson for ABC Company's Golden Gate division, you are tasked with selling Wi-Fi equipment. While evaluating the manufacturer's specifications for a specific Wi-Fi device, you read that this device supports 802.1X/EAP. What capability does this feature provide?

Question50: What is the most likely cause of low throughput on a hotel's guest network?

Question51: A software-based site survey tool sold by your company allows your customers to determine access point coverage and optimum placement within a facility without visiting the facility.
What is the term that most accurately describes this type of site survey?

Question52: You are hired by ABC Company to recommend an appropriate solution for their wireless network. They would like to operate in the 2.4 GHz ISM frequency band and will require data throughput in excess of 10 Mbps. To meet that need, you recommend equipment compliant with the ______ or ______ amendments to the 802.11 standard. (Choose 2)

Question53: Which explanations of antenna usage are the most accurate? (Choose 2)

Question54: As a salesperson, you have been contacted by an automobile dealership that currently manages each of their 5 SOHO-class access points individually. The owner of the dealership contracts his nephew for the dealership's network administration, but the nephew admits to a limited knowledge of WLAN technology.
The dealership owner and his nephew want you to advise them on how they can simplify the management of their wireless network. You tell them that they are currently managing __________ access points, and they could consider _____________ to ease the management burden.

Question55: As an alternative to using leased lines to connect two offices on the same campus, your customer wants to implement a Wi-Fi solution. When asked by your customer, what advantages do you cite regarding use of a Wi-Fi infrastructure instead of a leased line? (Choose 2)

Question56: What is used as a relative measurement of signal strength at the receiving client on an 802.11 wireless LAN?

Question57: Which statement best defines SNR?

Question58: After your city implemented a municipal Wi-Fi network using 802.11g on channels 1, 6, and 11 near your office, your users have been complaining about poor performance on their 802.11b VoWiFi phones. The best solution for optimizing your 802.11a/g network to support VoWiFi in this scenario is to
_____________.

Question59: Simple antenna diversity mitigates the adverse effects caused by which common Wi-Fi problem?

Question60: Given: A customer has recently purchased an 802.11g access point that accepts multiple external antennas. The customer wants to know if they need to purchase multiple antennas or a single antenna for the AP.
What do you tell them is a benefit of using multiple antennas?

Question61: ABC Company's wireless network is configured to hide the SSID in beacons, and allows connectivity only to approved MAC addresses. For encryption and authentication, ABC is using WEP security with a 128-bit key. You have been asked to provide feedback about the strength of their security. You tell ABC Company that _________.

Question62: ABC Company would like to provide Wi-Fi coverage to the area highlighted on the floorplan in the exhibit.

If mounted at location-A, what type of antenna would provide a coverage pattern similar to the highlighted area?

Question63: In a typical office building, Wi-Fi clients are likely to experience poor Wi-Fi coverage in what locations?
(Choose 2)

Question64: Exhibits:


View the figures and correctly identify the antenna types illustrated in the figures.

Question65: ABC Academy is currently using non-802.11 2.4 GHz wireless security cameras. What problem will ABC Academy experience if they deploy Wi-Fi client devices in the 2.4 GHz ISM band?

Question66: In order to assess your customer's Wi-Fi network needs, you have arranged an initial meeting with your customer's representatives and your systems engineer. So that you can request cooperation and input from all stakeholders, which individuals from your customer's company should you invite to this functional requirements meeting? (Choose 2)