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单选题
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
2.4GHz
B
900MHz
C
1.1GHz
D
5GHz
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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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A company has a business application that provides its users with many different reports： receivables reports， payables reports， revenue projects， and so on.The company has just purchased some new， state-of-the-art，wireless printers， and a programmer has been assigned the task of enhancing all of the reports to use not only the company’s old printers， but the new wireless printers as well.When the programmer starts looking into the application， the programmer discovers that because of the design of the application， it is necessary to make changes to each report to support the new printers. Which two design concepts most likely explain the situation？（）A、InheritanceB、Low cohesionC、Tight couplingD、High cohesionE、Loose couplingF、Object immutablility
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单选题An administrator is concerned about users utilizing the company's wireless signal with their personal laptops. Which of the following is the BEST method to use to prevent unauthorized devices from using the company's wireless network?（）A
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MAC filteringC
IP filteringD
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单选题An administrator is troubleshooting wireless connectivity issues at a client’s office and discoversthat the machine loses connectivity when the wireless phone is being used. Which of the following WAPS should be installed to help resolve the issue?（）A
802.1 1gB
802.1XC
802.11nD
802.11b
考题
单选题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
考题
单选题When setting up a new small office home office (SOHO) wireless network, which of the following is MOST likely to be the default wireless channel?（）A
2B
5C
6D
9
考题
多选题A company has a business application that provides its users with many different reports： receivables reports， payables reports， revenue projects， and so on. The company has just purchased somenew， state-of-the-art， wireless printers， and a programmer has been assigned the task of enhancing all ofthe reports to use not only the company’s old printers， but the new wireless printers as well. When the programmer starts looking into the application， the programmer discovers that because of the design of theapplication， it is necessary to make changes to each report to support the new printers. Which two designconcepts most likely explain this situation？ （）AInheritanceBLow cohesionCTight couplingDHigh cohesionELoose couplingFObject immutability
考题
单选题All users within an office are wirelessly connected to a network, except one user that has a valid connection on a leased IP address in a different range. Which of the following is a possible cause of the user having a different IP address range?（）A
The wireless access point is using MAC address filteringB
The user has connected to a nearby wireless access point from another officeC
The user has configured the wireless settings with the wrong encryption typeD
The wireless access point has SSID broadcast disabled
考题
单选题A company has installed a new 802.11g point-to-point connection between two buildings and isexperiencing low throughput across the link. The current setup involves a wireless bridge on the roof with an omni-directional antenna. Which of the following would BEST improve the link performance?（）A
Replace the wireless bridges with wireless access points.B
Install bi-directional amplifiers at both sites.C
Configure channel hopping on both wireless bridges.D
Replace the omni-directional antennas with Yagi antennas
考题
单选题After a technician replaces a laptop display, the technician now notices that the wireless no longer works. Which of the following would be the MOST likely cause？（）A
The wireless switch was damaged during the display installation.B
The network card has failed.C
The new display is interfering with the wireless signal.D
The antenna connector was not reconnected.
考题
单选题A company has implemented a wireless network for its employees. Since implementing the new network, individuals have been receiving duplicate IP addresses causing network issues. Which of the following would resolve this issue?（）A
Add another wireless access point.B
Add another DHCP server.C
Disable the wireless DHCP server.D
Change the default gateway of the wireless router
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?（）Amismatched TKIP encryptionBnull SSIDCcordless phonesDmismatched SSIDEmetal file cabinetsFantenna type or direction
考题
单选题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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