24  Take Assessment - CCNA 801 Certification Practice Exam #1 （下） - CCNA 4 WAN Technologies (Version 3.1) Which terms refer to Frame Relay congestion management mechanisms? (Choose three.) BECN DLCI DE FECN LMI Inverse ARP 25 A network administrator can ping the Denver router, but gets a 'Password Required but None Set' message when trying to connect remotely via Telnet. Which command sequence must be applied to the Denver router to allow remote access? Router(config)# line console 0Router(config-line)# loginRouter(config-line)# password cisco Router(config)# line vty 0 4Router(config-line)# loginRouter(config-line)# password cisco Router(config)# line virtual terminalRouter(config-line)# enable loginRouter(config-line)# password cisco Router(config)# line vty 0 4Router(config-line)# enable secretRouter(config-line)# password cisco Router(config)# enable secret cisco Router(config)# enable cisco 26 A network administrator is evaluating authentication protocols for a PPP link. Which of the following reasons might lead to the selection of CHAP over PAP as the authentication protocol? (Choose three.) establishes identities with a two-way handshake uses a three-way authentication periodically during the session to reconfirm identities control by the remote host of the frequency and timing of login events transmits login information in encrypted format uses an unpredictable variable challenge value to prevent playback attacks makes authorized network administrator intervention a requirement to establish each session *27 Refer to the graphic. Two switches are connected together through a trunk port. SW2 displays the message shown. Which of the following will solve the duplex mismatch? SW1(config)# interface fastethernet 0/1SW1(config-if)# duplex full SW1(config)# interface fastethernet 0/1SW1(config-if)# full-duplex SW2(config)# interface fastethernet 0/1SW2(config-if)# duplex full SW2(config)# interface fastethernet 0/1SW2(config-if)# full-duplex   28 Which of the following is a characteristics of TCP? (Choose two.) data transport reliability best path determination establishing, maintaining, and terminating virtual circuits encapsulation of packets in a data frame with source and destination MAC addresses best-effort datagram delivery 29 Which of the following application layer protocols use TCP? (Choose three.) SMTP FTP SNMP HTTP TFTP DHCP 30 Which of the following router commands will verify that a path exists to a destination network? Router# show ip interfaces brief Router# show ip route Router# show cdp neighbors Router# show running-config Router# show protocols 31 Which of the following are used to prevent routing loops in networks that use distance vector routing protocols? (Choose 2.) link-state advertisements (LSA) Spanning Tree Protocol shortest path first tree split horizon hold-down timers *32 Which two statements are true about the committed information rate on a Frame Relay link? (Choose two.) The sum of the CIRs for all PVCs must be less than the port speed. The sum of the CIRs for all PVCs must equal the port speed. The sum of the CIRs for all PVCs can be greater than the port speed. The DE bit will be set on frames that are transmitted in excess of the CIR. Frames that are transmitted at greater than the CIR will be discarded at the source. It is impossible to transmit frames at a rate in excess of the CIR. 33 Which of the following statements are true regarding PPP? (Choose three.) PPP can use synchronous and asynchronous physical media. PPP can only be used between two Cisco devices. PPP carries packets from several network layer protocols in LCPs. PPP uses LCPs to establish, configure, and test the data link connection. PPP uses LCPs to agree on format options such as authentication, compression, and error detection. 34 Which sequence of commands is used to configure a loopback address on a router? Router1(config)# interface loopback 1Router1(config-if)# ip address 192.168.1.1 Router1(config)# interface serial 0/0 Router1(config-if)# loopback 1Router1(config-if)# ip address 192.168.1.1 Router1(config)# interface serial 0/0 Router1(config-if)# loopback 1Router1(config-if)# ip address 192.168.1.1 255.255.255.0 Router1(config)# interface loopback 1Router1(config-if)# ip address 192.168.1.1 255.255.255.255 35 Which statement is true regarding the command ip route 192.168.7.24 255.255.255.248 192.168.7.9? (Choose two.) A packet destined for host 192.168.7.30 will be forwarded to address 192.168.7.9. 192.168.7.9 is the destination network for this route. 192.168.7.24 is the next-hop router in this command. This command is issued from the interface configuration mode. This command is used to define a static route. 36 Refer to the graphic. Two routers have been configured to use EIGRP. Packets are not being forwarded between the two routers. What could be the problem? EIGRP does not support VLSM. The routers were not configured to monitor neighbor adjacency changes. The default bandwidth was used on the routers. An incorrect IP address was configured on a router interface. 37 Which of the following are keywords that can be used in an access control list to replace a dotted decimal wildcard mask? (Choose two.) most host all any some sum *38 Identify the factors that contribute to congestion on an Ethernet LAN. (Choose three.) improper placement of enterprise level servers addition of hosts to a physical segment replacement of hubs with workgroup switches increasing use of bandwidth intensive network applications creation of new collision domains without first adding network hosts migration to full-duplex Ethernet within the LAN 39 Which statements are true regarding the Frame Relay LMI? (Choose three.) The LMI provides a virtual circuit (VC) status mechanism. The LMI type must always be manually configured. The available LMI types are NI1, DMS100 and 5ESS. The LMI types supported by Cisco routers are CISCO and IETF. The LMI type configured on the router must match the one used on the Frame Relay switch. The LMI uses reserved DLCIs to exchange messages between the DTE and DCE. *40 The show cdp neighbors command is a very useful network troubleshooting tool. Using the output in the graphic, select the statements that are true. (Choose two.) CDP operates at the network layer of the OSI model. The output of this command displays information about directly connected Cisco devices only. The switch is attached to the SanJose1 FastEthernet0/21 interface. SanJose1 is running CDP version 12.0. SanJose1 has two fully operational, cdp-enabled Cisco switches directly connected to it. SanJose2 is a 2600 series router running several routed protocols. 36 Refer to the graphic. Two routers have been configured to use EIGRP. Packets are not being forwarded between the two routers. What could be the problem? EIGRP does not support VLSM. The routers were not configured to monitor neighbor adjacency changes. The default bandwidth was used on the routers. An incorrect IP address was configured on a router interface. 37 Which of the following are keywords that can be used in an access control list to replace a dotted decimal wildcard mask? (Choose two.) most host all any some sum 38 Identify the factors that contribute to congestion on an Ethernet LAN. (Choose three.) improper placement of enterprise level servers addition of hosts to a physical segment replacement of hubs with workgroup switches increasing use of bandwidth intensive network applications creation of new collision domains without first adding network hosts migration to full-duplex Ethernet within the LAN 39 Which statements are true regarding the Frame Relay LMI? (Choose three.) The LMI provides a virtual circuit (VC) status mechanism. The LMI type must always be manually configured. The available LMI types are NI1, DMS100 and 5ESS. The LMI types supported by Cisco routers are CISCO and IETF. The LMI type configured on the router must match the one used on the Frame Relay switch. The LMI uses reserved DLCIs to exchange messages between the DTE and DCE. *40 The show cdp neighbors command is a very useful network troubleshooting tool. Using the output in the graphic, select the statements that are true. (Choose two.) CDP operates at the network layer of the OSI model. The output of this command displays information about directly connected Cisco devices only. The switch is attached to the SanJose1 FastEthernet0/21 interface. SanJose1 is running CDP version 12.0. SanJose1 has two fully operational, cdp-enabled Cisco switches directly connected to it. SanJose2 is a 2600 series router running several routed protocols. 41 Refer to the diagram. All ports on Switch A are in the Sales VLAN and all ports on Switch B are in the Accounting VLAN. How many broadcast domains and how many collision domains are shown? (Choose two). 3 collision domains 3 broadcast domains 5 broadcast domains 9 collision domains 10 collision domains 13 collision domains 42 The output of the show ip interfaces brief command indicates that Serial0 is up but the line protocol is down. Which of the following are possible causes for the line protocol being in the down state? (Choose two.) The clock rate is not set on the DTE. An incorrect default gateway is set on the router. A network is missing from the routing protocol configuration. The encapsulation on the Serial0 interface is incorrect. Keepalives are not being sent by the remote device. 43 What is the purpose of the Spanning Tree Protocol (STP)? prevents Layer 2 loops prevents routing loops on a router creates smaller collision domains creates smaller broadcast domains allows Cisco devices to exchange routing table updates 44 When EIGRP is configured on a router, which table of DUAL information is used to calculate the best route to each destination router? router table topology table DUAL table CAM table ARP table 45 Given the IP address and subnet mask of 172.16.134.56 255.255.255.224, on which subnetwork does this address reside? 172.0.0.0 172.16.134.0 172.16.134.32 172.16.134.48 172.16.134.47 172.16.134.63 46 Which two commands show when the last RIP routing update was received? (Choose two.) Router# show ip protocols Router# show version Router# show interfaces Router# show ip updates Router# show ip route 47 Which of the following commands would be used to troubleshoot the processing of call control functions such as call setup, signaling, and termination? show interface bri0/0 show isdn active debug isdn q921 debug isdn q931 debug ppp negotiation debug ppp authentication 48 What information is displayed in the output of the show interfaces serial 0/0 command for a Frame Relay connection? the DCLI-to-IP address mappings for each PVC the number of PVCs that are active on the router the number of BECN packets sent the encapsulation type 49 Refer to the exhibit. When troubleshooting a network, it is important to interpret the output of various router commands. On the basis of the exhibit, which three statements are true? (Choose three.) The missing information for Blank 1 is the command show ip route. The missing information for Blank 1 is the command debug ip route. The missing information for Blank 2 is the number 100. The missing information for Blank 2 is the number 120. The missing information for Blank 3 is the letter R. The missing information for Blank 3 is the letter C. 50 Which statement is true regarding states of the IEEE 802.1d Spanning Tree Protocol? Ports are manually configured to be in the forwarding state. Ports listen and learn before going into the forwarding state. Ports must be blocked before they can be placed in the disabled state. It takes 15 seconds for a port to go from blocking to forwarding. 51 Which commands are used to verify the content and placement of access control lists? (Choose three.) show ip interface show ip route show processes show running-config show cdp neighbor show access-lists 52 Assuming that four bits have been borrowed to make subnets, identify the subnet network addresses. (Choose three.) 192.168.14.8 192.168.14.16 192.168.14.24 192.168.14.32 192.168.14.148 192.168.14.208 53 A Catalyst switch must be in which VTP mode in order to delete or add VLANs to a management domain? client server domain transparent designated 54 Which of the following are required when creating a standard access control list? (Choose two.) destination address and wildcard mask source address and wildcard mask subnet mask and wildcard mask access list number between 100 and 199 or 2000 and 2699 access list number between 1 and 99 or 1300 to 1999 55 Why are static routes often used with ISDN DDR? They are more stable than dynamic routing protocols. They are more accurate than dynamic routing protocols because they are put in by a network administrator. They are easier to modify when a faster technology is installed. They prevent the unnecessary activation of the link. 56 Which statement describes the process that occurs in Network Address Translation (NAT) overloading? Multiple private IP addresses are mapped to one public IP address. The number of usable addresses assigned to a company is divided into smaller manageable groups. A pool of IP addresses are mapped to one or more MAC addresses. The router acts as a DHCP server and assigns multiple public IP addresses for each private IP address configured. 57 Refer to the graphic. Using the most efficient IP addressing scheme and VLSM, which address can be configured on one of the serial interfaces? 192.168.16.63/27 192.168.16.158/27 192.168.16.192/27 192.168.16.113/30 192.168.16.145/30 192.168.16.193/30 58 Which statements are true regarding the command sequence shown below? (Choose three.)RouterA(config)# interface loopback 0RouterA(config-if)# ip address 192.168.31.33 255.255.255.255 It creates a virtual, software only, interface. It uses a wildcard mask of 255.255.255.255. It ensures than an interface is always active for OSPF processes. It provides a way to test the convergence of OSPF routing updates. The mask of 255.255.255.255 is called a host mask. These commands can only be issued to configure serial interfaces.   输入您的搜索字词 提交搜索表单   Web ccna.programfan.com

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