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 caus

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第2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.)（）。

• A、mismatched TKIP encryption
• B、null SSID
• C、cordless phones
• D、mismatched SSID
• E、metal file cabinets
• F、antenna type or direction

第3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？ （）

• A、Inheritance
• B、Low cohesion
• C、Tight coupling
• D、High cohesion
• E、Loose coupling
• F、Object immutability

第4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 filtering
• B、The user has connected to a nearby wireless access point from another office
• C、The user has configured the wireless settings with the wrong encryption type
• D、The wireless access point has SSID broadcast disabled

第5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

第6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

第7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 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、Inheritance
• B、Low cohesion
• C、Tight coupling
• D、High cohesion
• E、Loose coupling
• F、Object immutablility

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第13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?（）

• A、mismatched TKIP encryption
• B、null SSID
• C、cordless phones
• D、mismatched SSID
• E、metal file cabinets
• F、antenna type or direction

第14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.

第15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 1g
• B、802.1X
• C、802.11n
• D、802.11b

第16题：

A user states that the wireless router keeps rebooting while the power to the other equipment stays on. Which of the following should the technician perform to prevent users from rebooting the router?（）

• A、Change the default administrator password
• B、Change the IP range of the wireless network
• C、Hide the SSID
• D、Disable WEP

第17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

第18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、2
• B、5
• C、6
• D、9

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