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Ccna 1 7

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  • 1. 1) Why is IEEE 802.11 wireless technology able to transmit further distances than Bluetoothtechnology?transmits at much lower frequencies* has higher power outputtransmits at much higher frequenciesuses better encryption methods2) What are three advantages of wireless over wired technology? (Choose three.)more securelonger range* anytime, anywhere connectivity* easy and inexpensive to installease of using licensed air space* ease of adding additional devices3) What are two benefits of wireless networking over wired networking? (Choose two.)speedsecurity* mobility* reduced installation timeallows users to share more resourcesnot susceptible to interference from other devices4) A technician has been asked to provide wireless connectivity to the wired Ethernet network of abuilding. Which three factors affect the number of access points needed? (Choose three.)* the size of the building* the number of solid interior walls in the building* the presence of microwave ovens in several officesthe encryption method used on the wireless networkthe use of both Windows and Appletalk operating systemsthe use of shortwave or infrared on the AP5) Why is security so important in wireless networks?Wireless networks are typically slower than wired networks.Televisions and other devices can interfere with wireless signals.* Wireless networks broadcast data over a medium that allows easy access.Environmental factors such as thunderstorms can affect wireless networks.6) What does the Wi-Fi logo indicate about a wireless device?IEEE has approved the device.The device is interoperable with all other wireless standards.* The device is interoperable with other devices of the same standard that also display the Wi-Filogo.The device is backwards compatible with all previous wireless standards.7) Which statement is true concerning wireless bridges?* connects two networks with a wireless link
  • 2. stationary device that connects to a wireless LANallows wireless clients to connect to a wired networkincreases the strength of a wireless signal8) Which WLAN component is commonly referred to as an STA?cellantennaaccess pointwireless bridge* wireless client9) Which statement is true concerning an ad-hoc wireless network?* created by connecting wireless clients in a peer-to-peer networkcreated by connecting wireless clients to a single, centralized APcreated by connecting multiple wireless basic service sets through a distribution systemcreated by connecting wireless clients to a wired network using an ISR10)Refer to the graphic. In the Wireless menu option of a Linksys integrated router, what does theNetwork Mode option Mixed mean?The router supports encryption and authentication.The router supports both wired and wireless connections.* The router supports 802.11b, 802.11g, and 802.11n devices.The router supports connectivity through infrared and radio frequencies.
  • 3. 11)Refer to the graphic. In the Wireless menu of a Linksys integrated router, what configuration optionallows the presence of the access point to be known to nearby clients?Network ModeNetwork Name (SSID)Radio BandWide ChannelStandard Channel* SSID Broadcast12) Which two statements about a service set identifier (SSID) are true? (Choose two.)* tells a wireless device to which WLAN it belongsconsists of a 32-character string and is not case sensitiveresponsible for determining the signal strength* all wireless devices on the same WLAN must have the same SSIDused to encrypt data sent across the wireless network13) Which two statements characterize wireless network security? (Choose two.)Wireless networks offer the same security features as wired networks.Wardriving enhances security of wireless networks.* With SSID broadcast disabled, an attacker must know the SSID to connect.* Using the default IP address on an access point makes hacking easier.An attacker needs physical access to at least one network device to launch an attack.14) What type of authentication does an access point use by default?* OpenPSKWEPEAP
  • 4. 15) Which statement is true about open authentication when it is enabled on an access point?* requires no authenticationuses a 64-bit encryption algorithmrequires the use of an authentication serverrequires a mutually agreed upon password16) What are two authentication methods that an access point could use? (Choose two.)WEPWPA* EAPASCII* pre-shared keys17) What is the difference between using open authentication and pre-shared keys?Open authentication requires a password. Pre-shared keys do not require a password.Open authentication is used with wireless networks. Pre-shared keys are used with wired networks.* Pre-shared keys require an encrypted secret word. Open authentication does not require a secretword.Pre-shared keys require a MAC address programmed into the access point. Open authenticationdoes not require this programming.18) What term describes the encoding of wireless data to prevent intercepted data from being readby a hacker?address filteringauthenticationbroadcasting* encryptionpassphrase encoding19) What access-point feature allows a network administrator to define what type of data can enterthe wireless network?encryptionhacking block* traffic filteringMAC address filteringauthentication20) What are the two WEP key lengths? (Choose two.)8 bit16 bit32 bit* 64 bit* 128 bit21) Complete the following sentence: WEP is used to ______ , and EAP is used to _____ wirelessnetworks.* encrypt; authenticate users onfilter traffic; select the operating frequency foridentify the wireless network; compress data oncreate the smallest wireless network; limit the number of users on