Which of the following wireless technologies is primarily setup for video/audio and the frequency is 5 GHz?（）A、CellularB、802.11aC、802.11bD、Satellite

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第4题：

A home user wants to setup a wireless network. Which of the following would be the MOST important consideration?（）

• A、Operating system type of the connected PCs
• B、Location of the wireless router
• C、Number of PCs that will access the network
• D、Number of available Ethernet ports on the router

正确答案:B

第5题：

Which of the following wireless technologies can operate at only 5GHz?（）

• A、802.11b/g
• B、802.11g
• C、802.11b
• D、802.11a

正确答案:D

第6题：

Which of the following wireless technologies is backward compatible to receive all bands ofwireless communications?（）

• A、802.11a
• B、802.11b
• C、802.11g
• D、802.11n

正确答案:D

第7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

正确答案:A

第8题：

An administrator is implementing a wireless network. Which of the following encryption technologies is the MOST secure method and will authenticate devices to the network?（）

• A、SSH
• B、WEP
• C、VPN
• D、WPA

正确答案:D

第9题：

Which of the following wireless standards can be used to avoid the 2.4GHz range?（） (Select TWO).

• A、802.11g
• B、802.1X
• C、802.11b
• D、802.1n
• E、802.11a

正确答案:D,E

第10题：

Which of the following wireless standards was the FIRST standard to be ratified and is used to support legacy wireless devices?（）

• A、802.11a
• B、802.11g
• C、802.11b
• D、802.11n

正确答案:C

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第15题：

A user reports that when the phone rings in their house the wireless on their laptops becomes disconnected. Which of the following BEST describes the issue?（）

• A、The cordless phones are plugged into same outlet as the router
• B、The cordless phones are 5.8Ghz which interferes with wireless
• C、The cordless phones are 2.4Ghz which interferes with wireless
• D、The cordless phones are plugged into the RJ-11 jack

正确答案:C

第16题：

Which of the following wireless standards uses the 5GHz frequency?（）

• A、802.11g
• B、802.2
• C、802.11a
• D、802.3

正确答案:C

第17题：

Which of the following are functions that are often provided by an ITSP but are not typically  provided by the PSTN？（）

• A、 QoS
• B、 call setup and teardown
• C、 call routing
• D、 call supervision
• E、 audio signal compression

正确答案:A,E

第18题：

Which of the following technologies is the MOST secure form of wireless encryption?（）

• A、SSL
• B、WPA
• C、WEP
• D、TLS

正确答案:B

第19题：

RG-6 coaxial cable is typically used in all of the following applications：（）

• A、multi-room audio， telephone， intercom and temperature control.
• B、thermostat， CCTV， smoke detectors and keypads.
• C、home theater， lighting control and multi-room audio.
• D、video， digital cable， and satellite applications.

正确答案:D

第20题：

Which of the following wireless standards has a MAXIMUM throughput, by default, of 11Mbps?（）

• A、802.11g
• B、802.11a
• C、802.1n
• D、802.11b

正确答案:D

第21题：

Which of the following wireless technologies can support the GREATEST distance on either 2.4GHz or 5GHz frequencies?（）

• A、802.11a
• B、802.11b
• C、802.11g
• D、802.11n

正确答案:D

第22题：

Which of the following interfaces are used to simultaneously transfer video and audio at highrates?（）

• A、HDMI
• B、DVI-D
• C、S-Video
• D、DVI-I

正确答案:A

第23题：