Which statement best describes the Cisco 2700 Location Appliance collection of location information for wireless devices?（）
A. all Wi-Fi devices on the WLAN send directly received signal strength indication （RSSI） information to the Cisco Wireless Location Appliance through SNMP
B. an AP collects RSSI information which is forwarded to wireless controllers through LWAPWireless controllers forward aggregated RSSI to the location appliance through SNMP
C. the APs collect received signal strength indication （RSSI） information from all Wi-Fi devices and forward the information to the Cisco Wireless Location Appliance through the LWAPP
D. the Cisco WLAN controllers bypass the received signal strength indication （RSSI） information from all Wi-Fi devices to the Cisco Wireless Location Appliance through the LWAPP
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变造的货币是指在（）的基础上，利用（）、（）、涂改、拼凑、移位、重印等多种方法制作，改变（）原形态的假币。
What is the purpose using the traceroute command?（）
A. to map all the devices on a network.
B. to display the current TCP/IP configuration values.
C. to see how a device MAC address is mapped to its IP address.
D. to see the path a packet will take when traveling to a specified destination.
E. to display the MTU values for each router in a specified network path from source to a destination.
渗水暗沟和渗水隧洞的纵坡不宜小于（）。
A. 2%
B. 2‰
C. 5%
D. 5&permil
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