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ICND CH11 WIRELESS

WIRELESS LANS

QuestionAnswer
Which of the following IEEE wireless LAN standards uses only the U-NII band of frequencies (around 5.4 GHz)? a. 802.11a b. 802.11b c. 802.11g d. 802.11i A. 802.11b uses only the ISM band (around 2.4 GHz), and 802.11g can use both ISM and U-NII. 802.11i is a security standard.
correct maximum speed at which two IEEE WLAN devices can send data with a particular standard? a. 802.11b, using OFDM, at 54 Mbps b. 802.11g, using OFDM, at 54 Mbps c. 802.11a, using DSSS, at 54 Mbps d. 802.11a, using DSSS, at 11 Mbps B. 802.11a uses only OFDM, and 802.11b uses only DSSS. 802.11g runs at a maximum of 54 Mbps using OFDM encoding.
Which of the following lists the nonoverlapping channels when using 802.1b DSSS in the U.S.? a. 1, 2, 3 b. 1, 5, 9 c. 1, 6, 11 d. a, b, g e. 22, 33, 44 C. 1,6, 11
Which of the following terms refers to a WLAN mode that allows a laptop to roam between different access points? a. ESS b. BSS c. IBSS d. None of the other answers are correct. A. The Extended Service Set (ESS) mode uses multiple access points, which then allows roaming between the APs. BSS uses a single AP, and IBSS (ad hoc mode) does not use an AP, so roaming between different APs cannot be done with BSS and IBSS
When configuring a wireless access point, which of the following are typical configuration choices? a. SSID b. The speed to use c. The wireless standard to use d. The size of the desired coverage area A and C. APs need to know the SSID for the WLAN the AP is supporting and, if an AP is capable of multiple standards, the wireless standard to use. The AP uses the best speed to each device based on the signal quality between the AP and that device; the
true about an ESS’s connections to the wired Ethernet LAN? a. The AP connects to the Ethernet switch using a crossover cable. b. The various APs in the same WLAN need to be assigned to the same VLAN by the Ethernet switches. c. The APs must have an I B. The AP connects to a LAN switch using a straight-through cable, just like an end-user device. All APs in the same ESS should connect to the same VLAN, because all clients connected to the same WLAN should be in the same subnet. Like LAN switches, AP
Which of the following are not common reasons why a newly installed WLAN does not allow a client to connect through the WLAN into the wired infrastructure? a. The AP is installed on top of a metal filing cabinet. b. The client is near a fast-food rest C&D. Ethernet cabling doNT typically give off any radio frequency interference, so cabling should not affect the WLAN communications. Clients discover APs by listening on all channels, so a configuration setting to a particular channel on an AP does no
SEE CH 11 QUESTION 6 & 7 SEE CH 11 QUESTION 6 & 7 PDF
Which of the following WLAN security standards refer to the IEEE standard? a. WPA b. WPA2 c. WEP d. 802.11i B and D. The standard is IEEE 802.11i. The Wi-Fi alliance defined the term WPA2 to refer to that same standard.
Which of the following security features were not in the original WEP security standard but are now in the WPA2 security standard? a. Dynamic key exchange b. Preshared Keys (PSK) c. 802.1x authentication d. AES encryption A,C,D
Created by: papid69
 

 



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