18. What is required for stations to use 256-QAM? 19. The period of time that exist between wireless frames is called __________.20. What are the two ways carrier sense is performed? (Choose two)21. What are the two frames used in active scanning? (Choose two)22. Which of the following devices are said to be parts of a Specialty WLAN Infrastructure (Choose all that apply)23. Many Law Enforcement agencies use frequency managers.24. When designing wireless networks, two concepts often conflict. What are they? (Choose two)25. The standard as amended defines which PoE device types?26. Which if the following is responsible for enrolling client devices? 27. What are the three main components of the 802.1X/EAP Framework? 28. A spectrum analyzer can be used to locate the source of which type of intentional attack?29. What is a primary concern when planning WLAN deployments within the government vertical market? 30. A facilities escort may be required when conducting a site survey.