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1、Exam A QUESTION 1 When you are logged into a switch, which prompt indicates that you are in privileged mode? A. % B. C. D. $ E. # QUESTION 2 Which command shows system hardware and software version information? A. show configuration B. show environment C. show inventory D. show platform E. show vers
2、ion QUESTION 3 Cisco Catalyst switches CAT1 and CAT2 have a connection between them using ports FA0/13. An 802. 1Q trunk is configured between the two switches. On CAT1, VLAN 10 is chosen as native, but on CAT2 the native VLAN is not specified.What will happen in this scenario? A. 802.1Q giants fram
3、es could saturate the link. B. VLAN 10 on CAT1 and VLAN 1 on CAT2 will send untagged frames. C. A native VLAN mismatch error message will appear. D. VLAN 10 on CAT1 and VLAN 1 on CAT2 will send tagged frames. QUESTION 4 Which command would correctly configure a serial port on a router with the last
4、usable host address in the 192.216.32.32/29 subnet? A. Router(config-if)# ip address 192.216.32.38 255.255.255.240 B. Router(config-if)# ip address 192.216.32.39 255.255.255.224 C. Router(config-if)# ip address 192.216.32.63 255.255.255.248 D. Router(config-if)# ip address 192.216.32.39 255.255.255.
5、248 E. Router(config-if)# ip address 192.216.32.63 255.255.255.248 F. Router(config-if)# ip address 192.216.32.38 255.255.255.248 QUESTION 5 The network default gateway applying to a host by DHCP is 192.168.5.33/28. Which option is the valid IP address of this host? A. 192.168.5.55 B. 192.168.5.47 C
6、. 192.168.5.40 CCNA（640-802）题库）题库V104.4 鸿鹄论坛 1 D. 192.168.5.32 E. 192.168.5.14 QUESTION 6 Which two addresses can be assigned to a host with a subnet mask of 255.255.254.0? (Choose two.) A. 113.10.4.0 B. 186.54.3.0 C. 175.33.3.255 D. 26.35.2.255 E. 17.35.36.0 QUESTION 7 The network administrator has
7、 asked you to check the status of the workstations IP stack by pinging the loopback address. Which address would you ping to perform this task? A. 10.1.1.1 B. 127.0.0.1 C. 192.168.0.1 D. 239.1.1.1 QUESTION 8 Workstation A has been assigned an IP address of 192.0.2.24/28. Workstation B has been assig
8、ned an IP address of 192.0.2.100/28. The two workstations are connected with a straight-through cable. Attempts to ping between the hosts are unsuccessful. What two things can be done to allow communications between the hosts? (Choose two.) A. Replace the straight-through cable with a crossover cabl
9、e. B. Change the subnet mask of the hosts to /25. C. Change the subnet mask of the hosts to /26. D. Change the address of Workstation A to 192.0.2.15. E. Change the address of Workstation B to 192.0.2.111. QUESTION 9 Your ISP has given you the address 223.5.14.6/29 to assign to your routers interfac
10、e. They have also given you the default gateway address of 223.5.14.7. After you have configured the address, the router is unable to ping any remote devices. What is preventing the router from pinging remote devices? A. The default gateway is not an address on this subnet. B. The default gateway is
11、 the broadcast address for this subnet. C. The IP address is the broadcast address for this subnet. D. The IP address is an invalid class D multicast address. QUESTION 10 Which command is used to copy the configuration from RAM into NVRAM? A. copy running-config startup-config 鸿鹄论坛 2 B. copy startup
12、-config: running-config: C. copy running config startup config D. copy startup config running config E. write terminal QUESTION 11 Which command is used to load a configuration from a TFTP server and merge the configuration into RAM? A. copy running-config: TFTP: B. copy TFTP: running-config C. copy
13、 TFTP: startup-config D. copy startup-config: TFTP: QUESTION 12 A system administrator types the command to change the hostname of a router. Where on the Cisco IFS is that change stored? A. NVRAM B. RAM C. FLASH D. ROM E. PCMCIA QUESTION 13 Which command is used to configure a default route? A. ip r
14、oute 172.16.1.0 255.255.255.0 0.0.0.0 B. ip route 172.16.1.0 255.255.255.0 172.16.2.1 C. ip route 0.0.0.0 255.255.255.0 172.16.2.1 D. ip route 0.0.0.0 0.0.0.0 172.16.2.1 QUESTION 14 If IP routing is enabled, which two commands set the gateway of last resort to the default gateway? (Choose two.) A. i
15、p default-gateway 0.0.0.0 B. ip route 172.16.2.1 0.0.0.0 0.0.0.0 C. ip default-network 0.0.0.0 D. ip default-route 0.0.0.0 0.0.0.0 172.16.2.1 E. ip route 0.0.0.0 0.0.0.0 172.16.2.1 QUESTION 15 Which command would you configure globally on a Cisco router that would allow you to view directly connecte
16、d Cisco devices? 鸿鹄论坛 3 A. enable cdp B. cdp enable C. cdp run D. run cdp QUESTION 16 Which command is used to see the path taken by packets across an IP network? A. show ip route B. show route C. traceroute D. trace ip route QUESTION 17 Which command is used to debug a ping command? A. debug icmp B
17、. debug ip icmp C. debug tcp D. debug packet QUESTION 18 Which command displays CPU utilization? A. show protocols B. show process C. show system D. show version QUESTION 19 When configuring a serial interface on a router, what is the default encapsulation? A. atm-dxi B. frame-relay C. hdlc D. lapb
18、E. ppp QUESTION 20 What must be set correctly when configuring a serial interface so that higher-level protocols calculate the best route? A. bandwidth B. delay C. load D. reliability 鸿鹄论坛 4 QUESTION 21 A company implements video conferencing over IP on their Ethernet LAN. The users notice that the
19、network slows down, and the video either stutters or fails completely. What is the most likely reason for this? A. minimum cell rate (MCR) B. quality of service (QoS) C. modulation D. packet switching exchange (PSE) E. reliable transport protocol (RTP) QUESTION 22 Which layer in the OSI reference mo
20、del is responsible for determining the availability of the receiving program and checking to see if enough resources exist for that communication? A. transport B. network C. presentation D. session E. application QUESTION 23 Data transfer is slow between the source and destination. The quality of se
21、rvice requested by the transport layer in the OSI reference model is not being maintained. To fix this issue, at which layer should the troubleshooting process begin? A. presentation B. session C. transport D. network E. physical QUESTION 24 Which protocols are found in the network layer of the OSI
22、reference model and are responsible for path determination and traffic switching? A. LAN B. routing C. WAN D. network QUESTION 25 Which command reveals the last method used to powercycle a router? A. show reload B. show boot 鸿鹄论坛 5 C. show running-config D. show version QUESTION 26 Which three optio
23、ns are valid WAN connectivity methods? (Choose three.) A. PPP B. WAP C. HDLC D. MPLS E. L2TPv3 F. ATM QUESTION 27 Refer to the exhibit. Which WAN protocol is being used? A. ATM B. HDLC C. Frame Relay D. PPP QUESTION 28 What is the difference between a CSU/DSU and a modem? A. A CSU/DSU converts analo
24、g signals from a router to a leased line; a modem converts analog signals from a router to a leased line. B. A CSU/DSU converts analog signals from a router to a phone line; a modem converts digital signals from a router to a leased line. C. A CSU/DSU converts digital signals from a router to a phon
25、e line; a modem converts analog signals from a router to a phone line. D. A CSU/DSU converts digital signals from a router to a leased line; a modem converts digital signals from a router to a phone line. QUESTION 29 A network administrator must configure 200 switch ports to accept traffic from only
26、 the currently attached 鸿鹄论坛 6 host devices. What would be the most efficient way to configure MAC-level security on all these ports? A. Visually verify the MAC addresses and then telnet to the switches to enter the switchport-port security mac-address command. B. Have end users e-mail their MAC add
27、resses. Telnet to the switch to enter the switchport-port security mac-address command. C. Use the switchport port-security MAC address sticky command on all the switch ports that have end devices connected to them. D. Use show mac-address-table to determine the addresses that are associated with ea
28、ch port and then enter the commands on each switch for MAC address port-security. QUESTION 30 When troubleshooting a Frame Relay connection, what is the first step when performing a loopback test? A. Set the encapsulation of the interface to HDLC. B. Place the CSU/DSU in local-loop mode. C. Enable l
29、ocal-loop mode on the DCE Frame Relay router. D. Verify that the encapsulation is set to Frame Relay. QUESTION 31 What occurs on a Frame Relay network when the CIR is exceeded? A. All TCP traffic is marked discard eligible. B. All UDP traffic is marked discard eligible and a BECN is sent. C. All TCP
30、 traffic is marked discard eligible and a BECN is sent. D. All traffic exceeding the CIR is marked discard eligible. QUESTION 32 What are two characteristics of Frame Relay point-to-point subinterfaces? (Choose two.) A. They create split-horizon issues. B. They require a unique subnet within a routi
31、ng domain. C. They emulate leased lines. D. They are ideal for full-mesh topologies. E. They require the use of NBMA options when using OSPF. QUESTION 33 Refer to the exhibit. Addresses within the range 10.10.10.0/24 are not being translated to the 1.128.0/16 range. Which command shows if 10.10.10.0
32、/24 are allowed inside addresses? 鸿鹄论坛 7 A. debug ip nat B. show access-list C. show ip nat translation D. show ip nat statistics QUESTION 34 A wireless client cannot connect to an 802.11b/g BSS with a b/g wireless card. The client section of the access point does not list any active WLAN clients. W
33、hat is a possible reason for this? A. The incorrect channel is configured on the client. B. The clients IP address is on the wrong subnet. C. The client has an incorrect pre-shared key. D. The SSID is configured incorrectly on the client. QUESTION 35 Which two features did WPAv1 add to address the i
34、nherent weaknesses found in WEP? (Choose two.) A. a stronger encryption algorithm B. key mixing using temporal keys C. shared key authentication D. a shorter initialization vector E. per frame sequence counters QUESTION 36 Which two wireless encryption methods are based on the RC4 encryption algorit
35、hm? (Choose two.) A. WEP B. CCKM C. AES D. TKIP E. CCMP QUESTION 37 What are two characteristics of RIPv2? (Choose two.) A. classful routing protocol B. variable-length subnet masks C. broadcast addressing D. manual route summarization E. uses SPF algorithm to compute path QUESTION 38 Which two Ethe
36、rnet fiber-optic modes support distances of greater than 550 meters? A. 1000BASE-CX B. 100BASE-FX 鸿鹄论坛 8 C. 1000BASE-LX D. 1000BASE-SX E. 1000BASE-ZX QUESTION 39 What two things will a router do when running a distance vector routing protocol? (Choose two.) A. Send periodic updates regardless of top
37、ology changes. B. Send entire routing table to all routers in the routing domain. C. Use the shortest-path algorithm to the determine best path. D. Update the routing table based on updates from their neighbors. E. Maintain the topology of the entire network in its database. QUESTION 40 Refer to the
38、 exhibit. According to the routing table, where will the router send a packet destined for 10.1.5.65? A. 10.1.1.2 B. 10.1.2.2 C. 10.1.3.3 D. 10.1.4.4 QUESTION 41 Which command shows if an access list is assigned to an interface? A. show ip interface interface access-lists B. show ip access-lists int
39、erface interface C. show ip interface interface D. show ip access-lists interface QUESTION 42 Refer to the exhibit. Which rule does the DHCP server use when there is an IP address conflict? 鸿鹄论坛 9 A. The address is removed from the pool until the conflict is resolved. B. The address remains in the p
40、ool until the conflict is resolved. C. Only the IP detected by Gratuitous ARP is removed from the pool. D. Only the IP detected by Ping is removed from the pool. E. The IP will be shown, even after the conflict is resolved. QUESTION 43 Refer to the exhibit. You are connected to the router as user Mi
41、ke. Which command allows you to see output from the OSPF debug command? A. terminal monitor B. show debugging C. show sessions D. show ip ospf interface QUESTION 44 Refer to the exhibit. If number 2 is selected from the setup script, what happens when the user runs setup from a privileged prompt? A.
42、 Setup is additive and any changes will be added to the config script. B. Setup effectively starts the configuration over as if the router was booted for the first time. C. Setup will not run if an enable secret password exists on the router. D. Setup will not run, because it is only viable when no
43、configuration exists on the router. 鸿鹄论坛 10 QUESTION 45 Refer to the exhibit. Which (config-router) command will allow the network represented on the interface to be advertised by RIP? A. redistribute ethernet0 B. network ethernet0 C. redistribute 10.12.0.0 D. network 10.12.0.0 QUESTION 46 Refer to
44、the exhibit. What information can be gathered from the output? A. One router is running RIPv1. B. RIP neighbor is 224.0.0.9. C. The network contains a loop. D. Network 10.10.1.0 is reachable. QUESTION 47 Refer to the exhibit. What type of connection would be supported by the cable diagram shown? 鸿鹄论
45、坛 11 A. PC to router B. PC to switch C. server to router D. router to router QUESTION 48 Refer to the exhibit. What type of connection would be supported by the cable diagram shown? A. PC to router B. PC to switch C. server to switch D. switch to router QUESTION 49 Which two statements describe the
46、Cisco implementation of VLANs? (Choose two.) A. VLAN 1 is the default Ethernet VLAN. B. CDP advertisements are only sent on VLAN 1002. C. By default, the management VLAN is VLAN 1005. D. By default, the switch IP address is in VLAN 1005. E. VLAN 1002 through 1005 are automatically created and cannot
47、 be deleted. QUESTION 50 Refer to the exhibit. What can be determined about the router from the console output? 鸿鹄论坛 12 A. No configuration file was found in NVRAM. B. No configuration file was found in flash. C. No configuration file was found in the PCMCIA card. D. Configuration file is normal and
48、 will load in 15 seconds. QUESTION 51 Refer to the exhibit. What can be determined from the output? A. 192.168.1.2 is local to the router. B. 192.168.3.1 is local to the router. C. 192.168.1.2 will age out in less than 1 minute. D. 192.168.3.1 has aged out and is marked for deletion. QUESTION 52 Ref
49、er to the exhibit. Which command would allow the translations to be created on the router? A. ip nat pool mynats 1.1.128.1 1.1.135.254 prefix-length 19 鸿鹄论坛 13 B. ip nat outside mynats 1.1.128.1 1.1.135.254 prefix-length 19 C. ip nat pool mynats 1.1.128.1 1.1.135.254 prefix-length 18 D. ip nat outside mynats 1.1.128.1 1.1.135.254 prefix-length 18 QUESTION 53 Refer to the exhibit. An administrator pings the default