CCNA测试题1、Which of the following host addresses are members of networks that can be routed across the public Internet?(Choose three.)A. 10.172.13.65B. 172.16.223.125C. 172.64.12.29D. 192.168.23.252E. 198.234.12.95F. 212.193.48.2542、What is a global command?A. a command that is available in every release of IOS, regardless of the versionor deployment statusB. a command that can be entered in any configuration modeC. a command that is universal in application and supports all protocolsD. a command that is implemented in all foreign and domestic IOS versionsE. a command that is set once and affects the entire router3、All WAN links inside the ABC University network use PPP with CHAP for authentication security. Which command will display the CHAP authentication process as it occurs between two routers in the network?A. show CHAP authenticationB. show interface serial0C. debug PPP authenticationD. debug CHAP authenticationE. show ppp authentication chap4、The RIP network shown in the graphic has been fully operational for two days. Each routing table is complete.Which networks will be included in the next routing update from the Apples router to the Pears router?A. A,B,C,D,E,FB. A,CC. A,B,CD. B,DE. D,E,F5、How should a router that is being used in a Frame Relay network be configured to avoid split horizon issues from preventing routing updates?A. Configure a separate sub-interface for each PVC with a unique DLCI and subnetassigned to thesub-interface.B. Configure each Frame Relay circuit as a point-to-point line to support multicastand broadcast traffic.C. Configure many sub-interfaces on the same subnet.D. Configure a single sub-interface to establish multiple PVC connections tomultiple remoterouter interfaces.6、What three pieces of information can be used in an extended access list to filter traffic? (Choose three.)A. protocolB. VLAN numberC. TCP or UDP port numbersD. source switch port numberE. source IP address and destination IP addressF. source MAC address and destination MAC address7、Refer to the exhibit. A network technician enters the following lines into the router.What is the effect of this configuration?A. The change has no effect on the packets being filtered.B. All traffic from the 192.168.254.0 LAN to the Internet is permitted.C. Web pages from the Internet cannot be accessed by hosts in the 192.168.254.0 LAN.D. No hosts in the 192.168.254.0 LAN except 192.168.254.7 can access web pages from theInternet.8、Refer to the exhibit. The partial frame in the graphic represents select header information within a framearriving at a destination host. What can be determined from this information?A. The source host is a Telnet server.B. This frame contains the first segment in a Telnet session.C. The Layer 2 address of the source host is 192.168.14.2.D. The local host has received 42,335 bytes from the remote host as a part of thisconversation.9、Refer to the exhibit. The technician wants to upload a new IOS in the router while keeping the existing IOS.What is the maximum size of an IOS file that could be loaded if the original IOS is also kept in flash?A. 3 MBB. 4 MBC. 5 MBD. 7 MBE. 8 MB10、Refer to the exhibit. To what does the 128 refer in the router output O 192.168.12.240/30 [110/128] via 192.168.12.233,00:35:36, Serial 0?A. OSPF costB. OSPF priorityD. OSPF ID numberE. OSPF administrative distance11、Refer to the exhibit. Workstation A must be able to telnet to switch SW-A through router RTA for management purposes. What must be configured for this connection to be successful?A. VLAN 1 on RTAB. default gateway on SW-AC. IP routing on SW-AD. cross-over cable connecting SW-A and RTA12、Refer to the exhibit. A technician is testing connection problems in the internetwork. What is the problem indicated by the output from HostA?A. The routing on Router2 is not functioning properly.B. An access list is applied to an interface of Router3.C. The Fa0/24 interface of Switch1 is down.D. The gateway address of HostA is incorrect or not configured.13、A network administrator needs to force a high-performance switch that is located in the MDF to become the root bridge for a redundant path switched network. What can be done to ensure that this switch assumes the role as root bridge?A. Establish a direct link from the switch to all other switches in the network.B. Assign the switch a higher MAC address than the other switches in the networkhave.C. Configure the switch so that it has a lower priority than other switches in thenetwork.D. Configure the switch for full-duplex operation and configure the other switchesfor half-duplex operation.E. Connect the switch directly to the MDF router, which will force the switch toassume the role of root bridge.14、Which commands are required to properly configure a router to run OSPF and to add network 192.168.16.0/24 to OSPF area 0? (Choose two.)A. Router(config)# router ospf 0B. Router(config)# router ospf 1C. Router(config)# router ospf area 0D. Router(config-router)# network 192.168.16.0 0.0.0.255 0E. Router(config-router)# network 192.168.16.0 0.0.0.255 area 0F. Router(config-router)# network 192.168.16.0 255.255.255.0 area 015、Refer to graphic and examine the output from the London switch . What VTP functions will this switch perform?A. create, change, and delete VLANs for the VTP domainB. learn and save VTP configuration information in the running configuration onlyC. forward VTP configuration informationD. backup the VTP database for the closest VTP serverE. prevent VTP information from reaching workgroup switches16、Which wild card mask will enable a network administrator to permit access to the Internet for only hosts that are assigned an address in the range of 192.168.8.0 through 192.168.15.255?A. 0.0.0.0C. 0.0.255.255D. 0.0.7.255E. 0.0.3.25517、Refer to the exhibit. Based on the exhibited routing table, how will packets from a host within the 192.168.10.192/26 LAN be forwarded to 192.168.10.1?A. The router will forward packets from R3 to R2 to R1.B. The router will forward packets from R3 to R1 to R2.C. The router will forward packets from R3 to R2 to R1 AND from R3 to R1.D. The router will forward packets from R3 to R1.18、Refer to the topology shown in the exhibit. Which ports will be STP designated ports if all the links are operating at the same bandwidth? (Choose three.)A. Switch A - Fa0/0B. Switch A - Fa0/1C. Switch B - Fa0/019、Refer to the exhibit. Switch1 sends a VTP advertisement and Switch2 receives it. Which statement accurately describes how Switch2 will process this advertisement?A. Switch2 will ignore the summary advertisement.B. Switch2 will delete all its VLANs because it has a lower revision number thanSwitch1.C. Switch2 will increment the VTP revision number and forward the advertisement.D. Switch2 will create two new VLANs in response to the information contained in theadvertisement20、Refer to the exhibit. Host A needs to send data to Host B. Which Layer 2 and Layer 3 destination addresses will be used to send the data from Host A to Host B?A. 192.168.60.5 and 0011.43da.2c98B. 192.168.60.5 and 0007.0e56.ab2eC. 192.168.24.1 and 0007.0e56.ab2eD. 192.168.24.2 and 0007.0e84.acef21、Why has the network shown in the exhibit failed to converge?A. The no auto-summary command needs to be applied to the routers.B. The network numbers have not been properly configured on the routers.C. The subnet masks for the network numbers have not been properly configured.D. The autonomous system number has not been properly configured.E. The bandwidth values have not been properly configured on the serial interfaces22、Refer to the exhibit. After the power-on self test (POST), the system LED ofa Cisco 2950 switch turns amber.What is the status of the switch?A. The POST was successful.B. The switch has a problem with the internal power supply and needs an externalpower supply to be attached.C. POST failed and there is a problem that prevents the operating system of the switchfrom being loaded.D. The switch has experienced an internal problem but data can still be forwardedat a slower rate.E. The switch passed POST, but all the switch ports are busy.23、Refer to the exhibit. All switch ports are assigned to the correct VLANs, but none of the hosts connected to SwitchA can communicate with hosts in the same VLAN connected to SwitchB. Based on the output shown, what is the most likely problem?A. The access link needs to be configured in multiple VLANs.B. The link between the switches is configured in the wrong VLAN.C. The link between the switches needs to be configured as a trunk.D. VTP is not configured to carry VLAN information between the switches.E. Switch IP addresses must be configured in order for traffic to be forwarded betweenthe switches24、Two routers named Atlanta and Brevard are connected by their serial interfaces as shown in the exhibit, but there is no data connectivity between them. The Atlanta router is known to have a correct configuration. Given the partial configurations shown in the exhibit, what is the problem on the Brevard router that is causing the lack of connectivity?A. A loopback is not set.B. The IP address is incorrect.C. The subnet mask is incorrect.D. The serial line encapsulations are incompatible.E. The maximum transmission unit (MTU) size is too large.F. The bandwidth setting is incompatible with the connected interface.。