CompTIA Network+ Practice Tests. Craig Zacker

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      134 Which of the following IEEE standards calls for the use of the Carrier-Sense Multiple Access with Collision Avoidance (CSMA/CA) Media Access Control (MAC) mechanism?802.11ac802.1X802.3All of the above

      135 Which of the following topologies enables wireless devices to access resources on a wired network?Ad hocStarInfrastructureBus

      136 Which of the following components are required for two computers to communicate using an IEEE 802.11 wireless LAN in an ad hoc topology?A router connected to the InternetA Wireless Access Point (WAP)An external antennaNone of the above

      137 Which of the following wireless networking technologies will never experience interference from a 2.4 GHz wireless telephone? (Choose all that apply.)IEEE 802.11aIEEE 802.11bIEEE 802.11gIEEE 802.11nIEEE 802.11acIEEE 802.11ax

      138 Which of the following wireless networking standards is capable of supporting speeds of 54 Mbps and is also backward compatible with IEEE 802.11b?IEEE 802.11aIEEE 802.11gIEEE 802.11nBluetoothIEEE 802.11

      139 Which of the following wireless LAN standards include the ability to use Multiple Input, Multiple Output (MIMO) antennae? (Choose all that apply.)IEEE 802.11aIEEE 802.11b/gIEEE 802.11nIEEE 802.11acIEEE 802.11ax

      140 Which of the following is a cellular communication technology that is virtually obsolete in the United States?GSMCDMATDMALTE

      141 Which of the following IEEE wireless LAN standards uses the Direct Sequence Spread Spectrum (DSSS) signal modulation technique?802.11a802.11b802.11g802.11n802.11ac

      142 When designing a wireless LAN installation, which of the following are valid reasons to install a unidirectional antenna in an Access Point (AP), rather than an omnidirectional one? (Choose all that apply.)The AP will be located against an outside wall.There are many interior walls between the AP and the most distant workstation.A unidirectional antenna can be focused to a specific signal pattern width.All of the above

      143 How do wireless networking devices conforming to the IEEE 802.11n and 802.11ac standards achieve transmission speeds greater than 72.2 Mbps?By using direct sequence spread spectrum (DSSS) modulationBy using multiple antennae to transmit several data streams simultaneouslyBy using frequencies in the 5 GHz bandBy sacrificing transmission range for speed

      144 Which of the following are possible reasons why the 5 GHz frequency tends to perform better than the 2.4 GHz frequency on a wireless LAN? (Choose all that apply.)The 5 GHz frequency has more channels than the 2.4 GHz frequency.The 5 GHz frequency supports longer ranges than the 2.4 GHz frequency.The 5 GHz frequency conflicts with fewer common household devices than the 2.4 GHz frequency.The 5 GHz frequency transmits at faster speeds than the 2.4 GHz frequency.

      145 Alice is attempting to deploy an IEEE 802.11b/g wireless LAN on the fifth floor of a 10-story office building that is surrounded on all sides by other office buildings, all of which seem to be running many wireless LANs. Scanning the 2.4 GHz band, she sees literally dozens of networks, spread across all of the available channels. As a result, her wireless devices have trouble connecting to their Access Point (AP), and when they do, they achieve only low speeds. Which of the following tasks should Alice perform to enable the wireless clients to connect to the network more reliably? (Choose two.)Upgrade all of the wireless network devices to IEEE 802.11n.Configure all of the network devices to use WPA2 encryption with AES.Configure the wireless devices to use the 5 GHz band.Configure the AP to suppress SSID broadcasts.Upgrade all of the network devices to the latest firmware.

      146 Which of the following is the fastest speed achievable by a wireless LAN using the currently ratified IEEE 802.11 standards?54 Mbps600 Mbps1.3 Gbps2.6 Gbps

      147 What is the term for the technology implemented in the IEEE 802.11ac standard that enables a wireless device to transmit multiple frames to multiple clients simultaneously?MIMOChannel bondingCSMA/CAMU-MIMO

      148 On an IEEE 802.11b/g/n wireless network running at 2.4 GHz with multiple Access Points (APs), the traditional best practice is to use channels 1, 6, and 11, with no two adjacent APs configured to use the same channel. Which of the following is the real reason why this is a good plan?Channels 1, 6, and 11 are the only channels with frequencies that do not overlap.Channels 1, 6, and 11 have more bandwidth than the other channels.Channels 1, 6, and 11 have greater ranges than the other channels.Channels 1, 6, and 11 are the default settings on most wireless devices.

      149 Ralph is planning a wireless LAN installation for a warehouse with two offices at either end of the building, approximately 300 feet apart. If he installs a single Access Point (AP) in the center of the warehouse, equidistant from the two offices, which of the following standards should he look for when purchasing hardware so that workstations in both offices will be able to connect to the network at the best possible speed?IEEE 802.11aIEEE 802.11gIEEE 802.11nIEEE 802.11ac

      150 Which of the following terms defines a wireless LAN transmission technique in which devices use multiple antennae to increase transmission speeds?MIMOTDMAPANAnt+

      151 What is the maximum channel width possible using wireless networking equipment based on the ratified IEEE 802.11 regulatory standards?20 MHz40 MHz80 MHz160 MHz

      152 Which of the following wireless networking standards are capable of using only the 5 GHz frequency? (Choose all that apply.)IEEE 802.11aIEEE 802.11bIEEE 802.11gIEEE 802.11nIEEE 802.11ac

      153 Which of the following IEEE wireless LAN standards provides the greatest possible throughput?802.11a802.11ac802.11b802.11g802.11n

      154 Which of the following IEEE 802.11 wireless LAN standards are capable of supporting both the 2.4 GHz and 5 GHz frequencies?802.11a802.11b802.11g802.11n802.11ac

      155 What is the maximum number of transmit and receive antennae supported by the currently ratified IEEE 802.11 wireless LAN standards?24816

      156 Which of the following is the term for the network name that you use to connect a client device to an Access Point (AP) on a wireless LAN?BSSESSSSIDBSSID

      157 Which of the following IEEE wireless LAN standards define devices with a maximum aggregate channel width of 20 MHz? (Choose all that apply.)802.11a802.11g802.11n802.11ac

      158 At which layer of the Open Systems Interconnection (OSI) model do wireless range extenders operate?PhysicalData linkNetworkTransportSessionPresentationApplication

      159 Which of the following wireless security protocols provides the greatest degree of network device hardening?WEPWPAWPA2EAP

      160 Which of the following encryption protocols was introduced in the WiFi Protected Access (WPA) wireless security standard?CCMP-AESTKIP-RC4EAP-TLSTACACS+

      161 TKIP-RC4 is an encryption protocol used with which of the following wireless network security standards?WEPWPAWPA2EAP

      162 Which of the following protocols provides wireless networks with the strongest encryption?AESTKIPEAP802.1X

      163 When the WiFi Protected Access (WPA) wireless security protocol was released to replace Wired Equivalent Privacy (WEP), it included the Temporal Key Integrity Protocol (TKIP) for encryption. Which of the following is not one of the improvements that WPA and TKIP provide over WEP?TKIP enlarges the WEP encryption key.TKIP modifies the encryption key for every packet.WPA does not require a hardware upgrade for WEP devices.TKIP eliminates the use of Pre-Shared Keys (PSKs).

      164 To connect a wireless client to a Wireless Access Point (WAP) using the WiFi Protected Access II (WPA2) security protocol with a Pre-Shared Key (PSK), which of the following must you supply on both devices?Base keyPassphraseSerial numberMAC address

      165 Upgrading СКАЧАТЬ