Lesson 15: Deploying and Troubleshooting Wireless

An administrator is evaluating the wireless coverage in a conference hall. There are enough access points to provide for 25 clients per access point, but many users are finding the wireless network to be unresponsive and timing out requests. What could be causing this issue? (Select all that apply.) A. CCI B. ACI C. Overcapacity D. Bandwidth saturation

A. CCI B. ACI D. Bandwidth saturation

This is the sum of transmit power, antenna cable/connector loss, and antenna gain and can affect wireless coverage.

Effective Isotropic Radiated Power (EIRP)

This is the interference from a powerful radio or electromagnetic sources working in the same frequency band, such as a Bluetooth device, cordless phone, or microwave oven.

Electromagnetic interference (EMI)

This is a documentation about a location for the purposes of building an ideal wireless infrastructure; it often contains optimum locations for wireless antenna and access point placement.

Site Survey

This authentication method method implements IEEE 802.1X to use an Extensible Authentication Protocol (EAP) mechanism to authenticate against a network directory

enterprise authentication

Which of the following are reasons why a client would unexpectedly disassociate from an access point? (Select all that apply.) A. Access Point Proximity B. MAC spoofing C. BYOD D. Interference

A. Access Point Proximity B. MAC spoofing D. Interference

What standards are most wireless LANs based on?

802.11

A small organization is securing their wireless network with Wi-Fi Protected Access 3 (WPA3) personal. What are some of the issues with this method of authentication? (Select all that apply.) A. Group authentication B. No accountability C. SAE D. PAKE

A. Group authentication B. No accountability

The IEEE 802.11 standards use two frequency bands. Which of the following statements regarding the frequency bands are true? (Select all that apply.) A. The 2.4 GHz band is ideal for providing the longest signal range B. The 5 GHz band is ideal for providing the longest signal range C. The 2.4 GHz band supports a high number of individual channels D. The 5 GHz band supports a high number of individual channels

A. The 2.4 GHz band is ideal for providing the longest signal range D. The 5 GHz band supports a high number of individual channels

An administrator is investigating issues with intermittent connection to the wireless network. The administrator verified the access point configurations are correct. What are some other areas the administrator should investigate? (Select all that apply.) A.Signal strength B.Cabling C.Interference D.Power

A.Signal strength C.Interference

An administrator is testing the signal strength in a concrete building and measures a 12 dB loss between the office where the access point is located and the office next door. What is the cause of the decibel loss?

Absorption

This occurs when access points use different but overlapping channels and it raises noise levels.

Adjacent channel interference (ACI)

A wireless administrator is troubleshooting dead zones in a building. Although the administrator used a heat map to determine the optimum position for access points (APs), some areas that should have coverage have very low signal strength which is unusable to clients. What should the administrator check? (Select all that apply.) A.Throughput B.Antenna placement C.Antenna cable attenuation D.EIRP

Antenna placement Antenna cable attenuation EIRP

An administrator is configuring a wireless LAN (WLAN) extended service area. Which of the following will the administrator need to configure the same on each access point? (Select all that apply.) A. BSSID B. ESSID C. BSS D. Security information

B. ESSID D. Security information

This is the media access control (MAC) address of an access point supporting a basic service area.

Basic Service Set Identifier (BSSID)

An administrator responsible for implementing network coverage in a historical monument cannot install cabling in many areas of the building. What are some ways the administrator can take advantage of wireless distribution systems (WDS) to help? (Select all that apply.) A. To create a beacon B. To create a BSA C. To create an ESA D. To create a bridge

C. To create an ESA D. To create a bridge

A library user connected their tablet to the library's open access point. Which of the following items will NOT secure the open connection and protect the user's communications? A. Using a VPN B. Using HTTPS C. Using a screen protector D. Enabling SSL/TLS

C. Using a screen protector

802.11 relies on a shared physical bus running at half-duplex. How does this standard manage contention?

CSMA/CA

This occurs when multiple access points use the same channel, and it reduces the opportunities for devices to transmit.

Co-Channel interference (CCI)

Which of the following are formats for 2G cellular communications? (Select all that apply.)

GSM CDMA

An administrator wants the ability to centrally configure and manage access points (APs). What are some solutions the administrator could use for this? (Select all that apply.)

Hardware Software

A wireless administrator is receiving reports that users cannot connect to the wireless network in certain areas of the building. What can the administrator use to locate dead zones?

Heat map

What protocol can an administrator configure in a wireless mesh network (WMN) to allow the stations to perform path discovery and forwarding between peers?

Hybrid Wireless Mesh Protocol (HWMP)

This is a type of wireless network where connected devices communicate directly with each other instead of over an established medium such as an access point.

Independent Basic Service Set (IBSS)

An administrator is configuring wireless coverage for a public library. What type of authentication should the administrator implement?

Open Authentication

This is when mirrors or shiny surfaces cause signals to reflect and introduce a variable delay which causes packet loss and the data rate to drop.

Reflection/Bounce

This is when a glass of water can cause radio waves to bend and take a different path to the receiver. This can also cause the data rate to drop.

Refraction

Wi-Fi 6 uses complex modulation and signal encoding. Why did Wi-Fi 6 reinstate operation in the 2.4 GHz band?

To support IoT

These antennas receive and send signals in all directions more-or-less equally and the installer should mount them on the ceiling for the best coverage, unless the ceiling is particularly high.

Vertical Rod

A wireless installer is networking a conference room with 9' ceilings. What is the best type of antenna for wireless devices?

Vertical rod

An administrator is implementing encryption on the wireless network. What standard should the administrator implement?

WPA2

This antenna, which is a bar with fins, extends the wireless signal to a particular area. This antenna is focused in a single direction.

Yagi