CCNA 640-802 V14 题库（11-15）

11. What are two recommended ways of protecting network device configuration files from outside networksecurity threats? (Choose two.)

A. Allow unrestricted access to the console or VTY ports.

B. Use a firewall to restrict access from the outside to the network devices.

C. Always use Telnet to access the device command line because its data is automatically encrypted.

D. Use SSH or another encrypted and authenticated transport to access device configurations.

E. Prevent the loss of passwords by disabling password encryption.

Answer: BD

12. Refer to the exhibit. The access list has been configured on the S0/0 interface of router RTB in the outbounddirection. Which two packets, if routed to the interface, will be denied? (Choose two.)

access-list 101 deny tcp 192.168.15.32 0.0.0.15 any eq telnet

access-list 101 permit ip any any

A. source ip address: 192.168.15.5; destination port: 21

B. source ip address:, 192.168.15.37 destination port: 21

C. source ip address:, 192.168.15.41 destination port: 21

D. source ip address:, 192.168.15.36 destination port: 23

E. source ip address: 192.168.15.46; destination port: 23

F. source ip address:, 192.168.15.49 destination port: 23

Answer: DE

13. What are two security appliances that can be installed in a network? (Choose two.)

A. ATM

B. IDS

C. IOS

D. IOX

E. IPS

F. SDM

Answer: BE

14. Refer to the exhibit. Switch1 has just been restarted and has passed the POST routine. Host A sends its initial frame to Host C. What is the first thing the switch will do as regards populating the switching table?

A. Switch1 will add 192.168.23.4 to the switching table.

B. Switch1 will add 192.168.23.12 to the switching table.

C. Switch1 will add 000A.8A47.E612 to the switching table.

TestInside    640-802   http://bbs.edify.com.cn/

D. Switch1 will add 000B.DB95.2EE9 to the switching table.

Answer: C

15. The user of Host1 wants to ping the DSL modem/router at 192.168.1.254. Based on the Host1 ARP table thatis shown in the exhibit, what will Host1 do?

A. send a unicast ARP packet to the DSL modem/router

B. send unicast ICMP packets to the DSL modem/router

C. send Layer 3 broadcast packets to which the DSL modem/router responds

D. send a Layer 2 broadcast that is received by Host2, the switch, and the DSL modem/router

Answer: B