Cisco CCNA 640-822 exam free sample questions

Cheat-test 640-822 Certification Exam
Interconnecting Cisco Networking Devices Part 1 Topitexams pass4sure p4s testking guide actualtests pass guaranteed
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Cisco 640-822 Exam - Cheat-Test.com Free 640-822 Sample Questions: 1. Why would a network administrator configure port security on a switch? A. to prevent unauthorized Telnet access to a switch port B. to limit the number of Layer 2 broadcasts on a particular switch port C. to prevent unauthorized hosts from accessing the LAN D. to protect the IP and MAC address of the switch and associated ports E. to block unauthorized access to the switch management interfaces over common TCP ports Answer: C 2. Which two statements best describe the wireless security standard that is defined by WPA? (Choose two.) A. It specifies use of a static encryption key that must be changed frequently to enhance security. B. It requires use of an open authentication method. C. It specifies the use of dynamic encryption keys that change each time a client establishes a connection. D. It requires that all access points and wireless devices use the same encryption key. E. It includes authentication by PSK. Answer: C, E 3. Which two statements describe the operation of the CSMA/CD access method? (Choose two.) A. In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously. B. In a CSMA/CD collision domain, stations must wait until the media is not in use before transmitting. C. The use of hubs to enlarge the size of collision domains is one way to improve the operation of the CSMA/CD access method. D. After a collision, the station that detected the collision has first priority to resend the lost data. E. After a collision, all stations run a random backoff algorithm. When the backoff delay period has expired, all stations have equal priority to transmit data. F. After a collision, all stations involved run an identical backoff algorithm and then synchronize with each other prior to transmitting data. Answer: B, E 4. Assuming a subnet mask of 255.255.248.0, which three addresses are valid host addresses? (Choose three.) A. 172.16.8.0 B. 172.16.9.0 C. 172.16.16.0 D. 172.16.20.0 E. 172.16.24.0 F. 172.16.31.0 Answer: B, D, F 5. Which form of NAT maps multiple private IP addresses to a single registered IP address by using different ports? A. static NAT B. dynamic NAT C. overloading D. overlapping E. port loading Answer: C