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802.11g wireless signals operating at 24GHz has a maximum line of sight range of which of thefollowing?（）
- A、460 feet (140 meters)
- B、540 feet (165 meters)
- C、560 feet (171 meters)
- D、840 feet (256 meters)
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11g wireless signals operating at 24GHz has a maximum line of sight range of which of thefollowing?()
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Which of the following wireless standards has the highest maximum data rate?（）A、802.11nB、802.11bC、802.11aD、802.11g
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The Company wireless network is using 802.11G access points. Which two statements are true about these access points？ （）A、 It supports eight different data rates.B、 It is fully backward compatible with 802.11bC、 It provides the same network throughput with 802.11b clients， 802.11g clients， or a mixed environment where both clients are present.D、 It is only compatibly with the 11 Mbps 802.11b transfer rate.E、 It has three non-overlapping channels in its channel options.
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An administrator receives reports from users in an office that their 802.11g wireless connectivity has been problematic since the installation of the new wireless phone system. At which of the following frequencies are both systems operating at to cause this issue?（）A、2.4GHzB、900MHzC、1.1GHzD、5GHz
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单选题Wireless components must work together for interoperability and performance. Which standard has specifications that are 2.4 GHz， 54 Mb/s， and a range of 150 feet？（）A
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多选题What are two ways in which the Cisco Security Monitoring， Analysis， and Response System provides superior network protection？ （）Areports financial losses from attacksBprovidessecutiy command and controlCprovides VPN connectivity to clientsDexpedites reporting of incidentsEmanage rogue wireless signals
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多选题The Company wireless network is using 802.11G access points. Which two statements are true about these access points？ （）AIt supports eight different data rates.BIt is fully backward compatible with 802.11bCIt provides the same network throughput with 802.11b clients， 802.11g clients， or a mixed environment where both clients are present.DIt is only compatibly with the 11 Mbps 802.11b transfer rate.EIt has three non-overlapping channels in its channel options.
考题
单选题802.11g wireless signals operating at 24GHz has a maximum line of sight range of which of thefollowing?（）A
460 feet (140 meters)B
540 feet (165 meters)C
560 feet (171 meters)D
840 feet (256 meters)
考题
多选题A single 802.11g access point has been configured and installed in the center of a square office. A few wireless users are experiencing slow performance and drops while most users are operating at peak efficiency. What are three likely causes of this problem? (Choose three.) （）Amismatched TKIP encryptionBnull SSIDCcordless phonesDmismatched SSIDEmetal file cabinetsFantenna type or direction
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问答题The study was means to examine how the brain reacts to electromagnetic fields caused by wireless phone signals.
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多选题A single 802.11g access point has been configured and installed in the center of a square officE.A few wireless users are experiencing slow performance and drops while most users are operating at peak efficiency. What are three likely causes of this problem? （）Amismatched TKIP encryptionBnull SSIDCcordless phonesDmismatched SSIDEmetal file cabinetsFantenna type or direction
考题
单选题If there is an existing 802.11g WLAN at a site， which service can be provided without conducting anew site survey？（）A
Add a new 802.11a WLANB
Increase the Layer 2 and Layer 3 security of the WLANC
Increase the throughput for the wireless clientsD
Add new services （such as voice） over the WLAN
考题
单选题You are designing the wireless networks for the three warehouses. Your design must support the inventory and shipping management solution， and it must meet security requirements. What should you do？（）A
Ensure that all wireless networking equipment fully supports the IEE 802.11a， IEEE 802.11b， and IEEE 802.11g wireless networking protocolsB
Assign a random service set identifier （SSID） to each wireless access point. Disable broadcasting of SSIDs on all wireless access pointsC
Create a firewall to block traffic to any IP address that did not originate from the company’s DHCP servers. Ensure that all wireless access points connect behind this new firewallD
Configure a server to use Internet Authentication Service （IAS）. Configure the wireless networking equipment to use the IEEE 802.1x protocol and the IAS server
考题
单选题Which statement concerning locating signals in the GMDSS is FALSE（）.A
Locating signals are transmitted by survival craft VHF transceiversB
Locating signals are transmitted by SARTsC
Locating signals are intended to facilitate the finding of a distressed vessel or its survivorsD
Locating signals are not transmitted by autoalarm generators
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