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NEW QUESTION 1
You are reconfiguring an AP to use the short guard interval. How long will the new guard interval duration be after the change?

  • A. 400 ns
  • B. 10 ms
  • C. 800 ns
  • D. 104 ms

Answer: A

Explanation:
Reference https://www.sonicwall.com/en-us/support/knowledge-base/170504672960493

NEW QUESTION 2
You administer a WLAN that offers a guest SSID of GUESTNWORK. User connect to the GUESTNWORK SSID, but report that they cannot browse the internet. The devices simply report no internet connection. What common problem causes this scenario?

  • A. NTP issues
  • B. Hardware issues
  • C. IP routing issues
  • D. Captive portal issues

Answer: C

NEW QUESTION 3
Which one of the following 802.11 PHYs is more likely to be used in an industrial deployment but not likely to be used in standard office deployments?

  • A. SIG
  • B. VHT
  • C. OFDM
  • D. HT

Answer: B

NEW QUESTION 4
What statement describes the authorization component of a AAA implementation?

  • A. Validating client device credentials against a database.
  • B. Implementing a WIPS as a full-time monitoring solution to enforce policies.
  • C. Granting access to specific network services or resources according to a user profile.
  • D. Verifying that a user is who he says he is.

Answer: C

Explanation:
Reference
http://searchsecurity.techtarget.com/definition/authentication-authorization-and-accounting

NEW QUESTION 5
Return Loss is the decrease of forward energy in a system when some of the power is being reflected back toward the transmitter.
What will cause high return loss in an RF transmission system, including the radio, cables, connectors and antenna?

  • A. The use of cables longer than one meter in the RF system
  • B. High output power at the transmitter and use of a low-gain antenna
  • C. A Voltage Standing Wave Ratio (VSWR) of 1:1
  • D. An impedance mismatch between components in the RF system

Answer: D

NEW QUESTION 6
You support a WLAN using dual-band 802.11ac three stream access points. All access points have both the 2.4 GHz and 5 GHz radios enabled and use 40 MHz channels in 5 GHz and 20 MHz channels in 2.4 GHz. A manager is concerned about the fact that each access point is connected using a 1 Gbps Ethernet link. He is concerned that the Ethernet link will not be able to handle the load from the wireless radios. What do you tell him? 2.4

  • A. His concern is valid and the company should upgrade all Ethernet links to 10 Gbps immediately.
  • B. His concern is valid and the company should immediately plan to run a second 1 Gbps Ethernet link to each AP.
  • C. His concern is invalid because the AP will compress all data before transmitting it onto the Ethernet link.
  • D. Due to 802.11 network operations and the dynamic rates used by devices on the network, the two radios will likely not exceed the 1 Gpbs Ethernet link.

Answer: A

NEW QUESTION 7
A client complains of low data rates on his computer. When you evaluate the situation, you see that the signal strength is -84 dBm and the noise floor is -96 dBm. The client is an 802.11ac client and connects to an 802.11acAP. Both the client and AP are 2x2:2 devices. What is the likely cause of the low data rate issue?

  • A. Weak signal strength
  • B. Too few spatial streams
  • C. Lack of support 802.11n
  • D. CAT5e cabling run to the AP

Answer: A

NEW QUESTION 8
When using a spectrum analyzer to look for non-Wi-Fi interference sources, you notice significant interference across the entire 2.4 GHz band (not on a few select frequencies) within the desktop area of a user’s workspace, but the interference disappears quickly after just 2 meters. What is the most likely cause of this interference?

  • A. USB 3 device in the user’s work area
  • B. Bluetooth devices in the user’s work area
  • C. Excess RF energy from a nearby AP
  • D. Unintentional radiation from the PC power supply

Answer: D

Explanation:
Reference https://www.reddit.com/r/electronics/comments/2i2s76/is_the_emf_of_a_pc_without_a_case_much_higher/?st=

NEW QUESTION 9
When a STA has authenticated to an AP (AP-1), but still maintains a connection with another AP (AP-2), what is the state of the STA on AP-1?

  • A. Transitional
  • B. Unauthenticated and Unassociated
  • C. Authenticated and Unassociated
  • D. Authenticated and Associated

Answer: A

Explanation:
Reference
https://www.cisco.com/c/en/us/td/docs/wireless/controller/8-1/Enterprise-Mobility-8-1-Design-Guide/Enterprise

NEW QUESTION 10
You are troubleshooting an issue reported by several wireless users. The problem is contained to one cell (several users connected to the same AP). You manage the WLAN and no other network devices. After analysis it appears to be a switch problem. What action should be taken?

  • A. Create a plan of action and implement it
  • B. Escalate the problem to the network administration team
  • C. Document the results and close the case
  • D. Escalate the problem to the wireless vendor support staff

Answer: B

NEW QUESTION 11
In WLAN security, what authentication method always creates Layer 2 dynamic encryption keys?

  • A. Shared Key
  • B. WEP
  • C. HTTPS captive portal
  • D. EAP-TLS

Answer: B

Explanation:
Reference https://books.google.com.pk/books?id=0ZWLn57EdpsC&pg=PA142&lpg=PA142&dq=WLAN+security,+what

NEW QUESTION 12
What security solution is deprecated in the 802.11 standard and should never be used in any modern WLAN deployment?

  • A. AES
  • B. Shared Key Authentication
  • C. CCMP
  • D. Open System Authentication

Answer: B

NEW QUESTION 13
What is appended to the end of each 802.11 data frame after the payload?

  • A. FCS
  • B. Preamble
  • C. MAC header
  • D. PHY header

Answer: A

NEW QUESTION 14
You support a WLAN using dual- band 802.11ac three stream access points. All access points have both the 2.4 GHz and 5 GHz radios enabled and use 40 MHz channels in 2.4 GHz. A manager is concerned about the fact that each access point is connected using a 1 Gbps Ethernet link. He is concerned that the Ethernet link will not be able to handle the load from the wireless radios. What do you tell him?

  • A. His concern is valid and the company should upgrade all Ethernet link to 10 Gbps immediately.
  • B. His concern is valid and the company should immediately plan to run a second 1 Gbps Ethernet link to each AP.
  • C. Due to 802.11 network operations and dynamic rates used by devices on the network, the two radios will likely not exceed the 1 Gbps Ethernet link .
  • D. His concern is invalid because the AP will compress all data before transmitting it onto the Ethernet link.

Answer: D

NEW QUESTION 15
When antenna gain is reported in dBI, the gain of the antenna is compared to what theoretical antenna?

  • A. Yagi
  • B. Dipole
  • C. Rubber ducky
  • D. Isotropic radiator

Answer: D

Explanation:
Reference https://en.wikipedia.org/wiki/Antenna_gain

NEW QUESTION 16
You are evaluating a connection that states the data rate is 150 Mbps. What is the expected throughput of this connection?

  • A. Less than 150 Mbps because of 802.11 overhead and contention
  • B. 54 Mbps because that is the actual maximum throughput of an 802.11 connection
  • C. More than 150 Mbps because of compression
  • D. 150 Mbps because the data rate is equal to the throughput

Answer: A

NEW QUESTION 17
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