ActualTests.Cisco.640-802.Exam.Q.and.A.08.15.08-DDU (1130589), страница 64
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OpenUnauthorized access prohibited!User Access VerificationPassword:Which command can be used to configure this message?A. login banner x Unauthorized access prohibited! XB. banner exec y Unauthorized access prohibited! YC. banner motd x Unauthorized access prohibited! XD. vty motd "Unauthorized access prohibited!"E. None of the aboveAnswer: CExplanation:The message text that is displayed when users log into the router is called the "messageof the day" banner, and is it can be changed with the "banner motd" command as shownin answer choice C.QUESTION 562:A Certkiller router was configured as shown below:Actualtests.com - The Power of Knowing640-802A Certkiller .com technician is connected to the router console port.
Afterconfiguring the commands displayed in the exhibit, the technician log out and thenlogs back in at the console. Which password does the technician need to enter at therouter prompt get back into the privileged EXEC mode?A. Certkiller 1B. Certkiller 2C. Certkiller 3D.
A password would not be required.Answer: BExplanation:Certkiller 2 is the answer because the enable secret password is used to log back to therouter before the enable password is used. The enable secret password always overwritesthe enable password.Answer C is incorrect because this is for the vty and not the console, so it will berequired for the initial telnet login.QUESTION 563:Refer to the graphic. Although the console password was set to " Certkiller ", itdisplays in the router configuration as shown. What command caused the passwordto be stored like this?A. Certkiller 1(config)# encrypt passwordActualtests.com - The Power of Knowing640-802B. Certkiller 1(config)# password-encryption md 7C.
Certkiller 1(config-line)# exec-timeout 1 55D. Certkiller 1(config)# service password-encryptionE. None of the aboveAnswer: DExplanation:Certain types of passwords, such as Line passwords, by default appear in clear text in theconfiguration text file. You can use the service password-encryption command to makethem more secure. Once this command is entered, each password configured isautomatically encrypted and thus rendered illegible inside the configuration file (much asthe Enable/Enable Secret passwords are). Securing Line passwords is doubly important innetworks on which TFTP servers are used, because TFTP backup entails routinelymoving config files across networks-and config files, of course, contain Line passwords.QUESTION 564:The Certkiller 1 and Certkiller 2 routers are connected together as shown below:Users on the Certkiller 1 LAN are able to successfully access the resources on theCertkiller 2 network.
However, users on Certkiller 1 are unable to telnet to theCertkiller 2 router. What do you suspect are the likely causes of this problem? (Selecttwo answer choices)A. PPP authentication configuration problem.B. A misconfigured IP address or subnet maskC. An access control listD. A defective serial cable.E. No clock rate on interface s0 on Certkiller 2F. A missing vty password.Answer: C, FExplanation:Actualtests.com - The Power of Knowing640-802An ACL or a router configured without a VTY password will prevent users from beingable to telnet into a router.Incorrect Answers:A, B, D, E.
We know that the network is connected together and communicating backand forth because of the two way CHAP authentication happening. In addition, the LANusers are able to get to each other with no problems. Therefore A is incorrect, B isincorrect, D is incorrect, and E is incorrect.QUESTION 565:DRAG DROPYou work as a network administrator at Certkiller .com.Your boss, Mrs. Certkiller, is interested in password configuration commands.Match the commands below with the appropriate tasks. Note that one of thecommands will not be used.Actualtests.com - The Power of Knowing640-802Answer:QUESTION 566:A new Certkiller is using an IEEE 802.11b a wireless LAN. What is the maximumdata rate specified for this WLAN?A.
11 mbpsB. 100 mbpsC. 54 mbpsD. 10 mbpsE. 1000 mbpsF. 16 mbpsG. None of the aboveAnswer: AActualtests.com - The Power of Knowing640-802Explanation:The maximum speed for 802.11b is 11 Mbps.Incorrect Answers:A. This is the maximum speed for legacy Ethernet networks.C. This is the maximum speed supported by the other prevalent wireless standards,802.11a and 802.11g.D, E. This is the maximum speed of Ethernet and Gig E connections.F. This is the maximum data rate for token ring.QUESTION 567:Which IEEE standard is used to define Wi-Fi?A.
IEEE 802.3B. IEEE 802.5C. IEEE 802.11hD. IEEE 802.11cE. IEEE 802.11Answer: EExplanation:IEEE 802.11 was the original standard for wireless networks. However, the standard hada few ambiguities allowed for potential problems with compatibility between devices. Toensure compatibility, a group of companies formed the Wireless Ethernet CompatibilityAlliance (WECA), which has come to be known as the Wi-Fi Alliance, to ensure thattheir products would work together. The term Wi-Fi is now used to refer to any IEEE802.11 wireless network products that have passed the Wi-Fi Alliance certification tests.Incorrect Answers:A.
This is the standard used for Ethernet networks.B. This is the standard used in Token Ring networks.C, D: These standards are not currently used. The most prevalent types of wireless802.11 networks are 802.11a, 802.11b, and 802.11g.QUESTION 568:802.1b is being utilized in the Certkiller wireless network. Which spread spectrumtechnology does the 802.1b standard define for operation in this network?A. FHSSB. IRActualtests.com - The Power of Knowing640-802C.
DSSS and FHSSD. DSSSE. IR, FHSS and DSSSF. None of the aboveAnswer: DExplanation:In telecommunications, direct-sequence spread spectrum (DSSS) is a modulationtechnique. As with other spread spectrum technologies, the transmitted signal takes upmore bandwidth than the information signal that is being modulated. The name 'spreadspectrum' comes from the fact that the carrier signals occur over the full bandwidth(spectrum) of a device's transmitting frequency.QUESTION 569:Two Certkiller workers have established wireless communication directly betweentheir wireless laptops. What type of wireless topology has been created by theseCertkiller employees?A.
ESSB. IBSSC. SSIDD. BSSE. None of the aboveAnswer: BExplanation:An independent BSS (IBSS) is an ad-hoc network that contains no access points, whichmeans they can not connect to any other basic service set.QUESTION 570:Three access points have been installed and configured to cover a small office. Whatterm defines the wireless topology?A. ESSB. IBSSC. SSIDD. BSSAnswer: AActualtests.com - The Power of Knowing640-802Explanation:Extended service set:An extended service set (ESS) is a set of connected Basic Service Sets.
Access points inan ESS are connected by a distribution system. Each ESS has an ID called the SSIDwhich is a 32-byte (maximum) character string. For example, "linksys" is the defaultSSID for Linksys routers.QUESTION 571:A single 802.11g access point has been configured and installed in the center of asquare shaped Certkiller office.
A few wireless Certkiller users are experiencing slowperformance and drops while most users are operating at peak efficiency. From thelist below, what are three likely causes of this problem? (Choose three)A. Null SSIDB. Mismatched TKIP encryptionC. Cordless phonesD. Antenna type or directionE. Mismatched SSIDF. Metal file cabinetsG. Microwave ovens in the break roomAnswer: C, D, FExplanation:C: If you have cordless phones or other wireless electronics in your home or office, yourcomputer might not be able to "hear" your router over the noise from the other wirelessdevices.
To quiet the noise, avoid wireless electronics that use the 2.8GHz frequency.Instead, look for cordless phones that use the 5.8GHz or 900MHz frequencies.D: The antennas supplied with your router are designed to be omni-directional, meaningthey broadcast in all directions around the router. If your router is near an outside wall,half of the wireless signals will be sent outside your office, and much of your router'spower will be wasted.Since most users operate at peak efficiency in our example, it could be that a few of theusers are simply placed too far from the antenna, or the antenna is not placed in the centerof the office.F: Metal, walls, and floors will interfere with your router's wireless signals. The closerActualtests.com - The Power of Knowing640-802your router is to these obstructions, the more severe the interference, and the weaker yourconnection will be.QUESTION 572:Part of the Certkiller wireless LAN is shown below:What two facts can be determined from the diagram of the Certkiller WLAN shownabove? (Choose two)A.
Access points in each cell must be configured to use channel 1B. The network diagram represents an extended service set (ESS)C. The two AP's should be configured to operate on different channelsD. The area of overlap of the two cells represents a basic service set (BSS)E. The area of overlap must be less than 10% of the area to ensure connectivityF. There are too many hosts on this WLANAnswer: B, CQUESTION 573:You are responsible for securing the Certkiller Wireless LAN using WPA.
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