CCNA 4 Final Exam The final exam covers all sets that were included in CCNA Exploration exam. junkshack published on October 28, 2013 Stacked 1/68 Which combination of authentication and Layer 2 protocol should be used to establish a link between a Cisco and a non-Cisco router without sending authentication information in plain text? CHAP and HDLC CHAP and PPP PAP and HDLC PAP and PPP 2/68 When Frame Relay encapsulation is used, what feature provides flow control and exchanges information about the status of virtual circuits? LCP LMI DLCI Inverse ARP 3/68 Refer to the exhibit. Company ABC expanded its business and recently opened a new branch office in another country. IPv6 addresses have been used for the company network. The data servers Server1 and Server2 run applications which require end-to-end functionality, with unmodified packets that are forwarded from the source to the destination. The edge routers R1 and R2 support dual stack configuration. What solution should be deployed at the edge of the company network in order to successfully interconnect both offices? a new WAN service supporting only IPv6 NAT overload to map inside IPv6 addresses to outside IPv4 address a manually configured IPv6 tunnel between the edge routers R1 and R2 static NAT to map inside IPv6 addresses of the servers to an outside IPv4 ddress and dynamic NAT for the rest of the inside IPv6 addresses 4/68 A company is looking for a WAN solution to connect its headquarters site to four remote sites. What are two advantages that dedicated leased lines provide compared to a shared Frame Relay solution? Hint: 2 choices reduced jitter reduced costs reduced latency the ability to burst above guaranteed bandwidth the ability to borrow unused bandwidth from the leased lines of other customers 5/68 Refer to the exhibit. Headquarters is connected through the Internet to branch office A and branch office B. Which WAN technology would be best suited to provide secure connectivity between headquarters and both branch offices? ATM VPN ISDN Frame Relay broadband DSL 6/68 What is the result when the command permit tcp 10.25.132.0 0.0.0.255 any eq smtp is added to a named access control list and applied on the inbound interface of a router? TCP traffic with a destination to the 10.25.132.0/24 is permitted. Only Telnet traffic is permitted to the 10.24.132.0/24 network Ttraffic from 10.25.132.0/24 is permitted to anywhere on using any port. Traffic using port 25 from the 10.25.132.0/24 is permitted to all destinations. 7/68 A DHCP server is configured with a block of excluded addresses. What two devices would be assigned static addresses from the excluded address range? Hint: 2 choices a protocol analyzer DNS server for the network network printer that is used by many different users a laptop that will get a different address each time it boots up 8/68 Frame Relay switches are normally considered to be customer premises equipment (CPE) and are maintained by local administrators. The bandwidth capability of the interface increases and decreases automatically based on BECNs. The Serial0/0/1 interface acquired 172.16.3.1 from a DHCP server. The mapping between DLCI 100 and 172.16.3.1 was learned through Inverse ARP. DLCI 100 will automatically adapt to changes in the Frame Relay cloud. 9/68 Which variable is permitted or denied by a standard access control list? protocol type source IP address source MAC address destination IP address destination MAC address 10/68 Refer to the exhibit. All devices are configured as shown in the exhibit. PC1 is unable to ping the default gateway. What is the cause of the problem? The default gateway is in the wrong subnet. STP has blocked the port that PC1 is connected to. Port Fa0/2 on S2 is assigned to the wrong VLAN. S2 has the wrong IP address assigned to the VLAN30 interface. 11/68 What three questions can be answered using data gathered from a baseline on a new network? Hint: 3 choices Are areas of the network experiencing high error rates? Will the disaster recovery procedures work correctly? What parts of the network have the highest volume? Does the organization require more network technicians? How does the network perform during peak periods? Are there any devices working at top capacity? What networks are the most susceptible to security attacks? 12/68 What are two main components of data confidentiality? Hint: 2 choices checksum digital certificates encapsulation encryption hashing 13/68 An administrator is configuring a dual stack router with IPv6 and IPv4 using RIPng. The administrator receives an error message when trying to enter the IPv4 routes into RIPng. What is the cause of the problem? When IPv4 and IPv6 are configured on the same interface, all IPv4 addresses are over-written in favor of the newer technology. Incorrect IPv4 addresses are entered on the router interfaces. RIPng is incompatible with dual-stack technology. IPv4 is incompatible with RIPng. 14/68 Refer to the exhibit. A network administrator has issued the commands that are shown on Router1 and Router2. A later review of the routing tables reveals that neither router is learning the LAN network of the neighbor router. What is most likely the problem with the RIPng configuration? The serial interfaces are in different subnets. The RIPng process is not enabled on interfaces. The RIPng network command is not configured. The RIPng processes do not match between Router1 and Router2. 15/68 Which option represents a best practice for applying ACLs? Named ACLs are less efficient than numbered ACLs. Standard ACLs should be applied inside the core layer. ACLs applied to outbound interfaces use fewer router resources. Extended ACLs should be applied closest to the source that is specified by the ACL. 16/68 Refer to the exhibit. Communication between two peers has failed. Based on the output that is shown, what is the most likely cause? interface reset unplugged cable improper LMI type PPP negotiation failure 17/68 Which two configurations must be completed before an RSA key can be generated on a router? Hint: 2 choices a hostname a domain name the SSH version the SSH timeouts local authentication on the VTY lines 18/68 An employee of XYZ corporation will begin working from home. The employee has a choice of DSL or cable technology for WAN connectivity. Which connectivity characteristic is accurately described? Cable transfer rates are dependent on the length of the local loop. DSL provides a high-speed connection over existing copper phone wires. DSL download speeds are affected by high usage in the area DSL service shares the same frequency range as voice calls. Cable connectivity usually requires new fiber installed for the local loop. 19/68 Because of a remote-procedure call failure, a user is unable to access an NFS server. At what layer of the TCP/IP model does this problem occur? network layer data link layer physical layer application layer 20/68 Refer to the exhibit. The link between the CTRL and BR_1 routers is configured as shown in the exhibit. Why are the routers unable to establish a PPP session? The clock rate must be 56000. The usernames are misconfigured. The IP addresses are on different subnets. The clock rate is configured on the wrong end of the link. The CHAP passwords must be different on the two routers. Interface serial 0/0/0 on CTRL must connect to interface serial 0/0/1 on BR_1. 21/68 Refer to the exhibit. R1 is performing NAT overload for the 10.1.1.0/24 inside network. Host A has sent a packet to the web server. What is the destination IP address of the return packet from the web server? 10.1.1.2:1234 172.30.20.1:1234 172.30.20.1:3333 192.168.1.2:80 22/68 A company is deciding which WAN connection type it should implement between its main office and branch offices. The company wants to use a cost-effective service that provides virtual circuits between each office. The company also wants to be able to transmit variable-length packets on these circuits. Which solution best meets these requirements? ATM HDLC ISDN Frame Relay 23/68 A technician is talking to a colleague at a rival company and comparing DSL transfer rates between the two companies. Both companies are in the same city, use the same service provider, and have the same rate/service plan. What is the explanation for why company 1 reports higher download speeds than company 2 reports? Company 2 downloads larger files than company 1 downloads. Company 2 must share the connection to the DSLAM with more clients than company 1 shares. Company 1 is closer to the service provider than is company 2. Company 1 has a lower volume of POTS traffic than company 2 has. 24/68 While troubleshooting a problem with an e-mail server, an administrator observes that the switch port used by the server shows “up, line protocol up”. The administrator cannot ping the server. At which layer of the OSI model is the problem most likely to be found? application layer network layer data link layer physical layer 25/68 A company has its headquarters office in Dallas and five branch offices located in New York, Chicago, Los Angeles, Seattle, and Atlanta. WAN links are used for communications among offices in six sites. In planning the WAN links, the network designer is given two requirements: (1) minimize cost and (2) provide a certain level of WAN link reliability with redundant links. Which topology should the network designer recommend? star full mesh hierarchical partial mesh 26/68 Refer to the exhibit. A network administrator is tasked with completing the Frame Relay topology that interconnects two remote sites. How should the point-to-point subinterfaces be configured on HQ to complete the topology? frame-relay interface-dlci 103 on Serial 0/0/0.1frame-relay interface-dlci 203 on Serial 0/0/0.2 frame-relay interface-dlci 301 on Serial 0/0/0.1frame-relay interface-dlci 302 on Serial 0/0/0.2 frame-relay map ip 192.168.1.1 103 broadcast on Serial 0/0/0.1frame-relay map ip 192.168.2.2 203 broadcast on Serial 0/0/0.2 frame-relay map ip 192.168.1.1 301 broadcast on Serial 0/0/0.1frame-relay map ip 192.168.2.2 302 broadcast on Serial 0/0/0.2 27/68 Refer to the exhibit. Users who are connected to R1 report that they are unable to establish connectivity to the users who are connected to router R2. A network administrator tests the link with the debug ppp authentication command. Based on the output shown, which statement correctly defines the problem on the link? R1 uses PAP as a method of authentication, and R2 uses CHAP R1 uses CHAP as a method of authentication, and R2 uses PAP. R1 uses an incorrect user name or password for CHAP authentication. R2 uses an incorrect user name or password for PAP authentication. 28/68 Refer to the exhibit. A host connected to Fa0/0 is unable to acquire an IP address from the DHCP server. The output of the debug ip dhcp server command shows “DHCPD: there is no address pool for 192.168.3.17″. What is the problem? The address 192.168.3.17 address is already in use by Fa0/0. The pool of addresses for the 192Network pool is configured incorrectly. The ip helper-address command should be used on the Fa0/0 interface. The 192.168.3.17 address has not been excluded from the 192Network pool 29/68 Which technology is used to dynamically map next hop, network layer addresses to virtual circuits in a Frame Relay network? Inverse ARP LMI DLCI 30/68 Refer to the exhibit. An ACL called Managers already exists on this router. What happens if the network administrator issues the commands as shown in the exhibit? The new ACL overwrites the existing ACL The network administrator will receive an error message. The existing ACL is modified to include the new command. A second Managers ACL is created that contains only the new command. 31/68 What component of VPN technology combines message text with a key to make the message unreadable by unauthorized receivers? message hash user password RSA signature encryption algorithm 32/68 What functionality do access control lists provide when implementing dynamic NAT on a Cisco router? which addresses are allowed to be accessed from the inside network which addresses are allowed out of the router which addresses are assigned to a NAT pool which addresses are to be translated 33/68 Refer to the exhibit. What is placed in the address field in the header of a frame that will travel from the DC router to the Orlando router? DLCI 123 DLCI 321 10.10.10.25 10.10.10.26 MAC address of the Orlando router 34/68 Refer to the exhibit. From the output of the show interfaces and ping commands, at which layer of the OSI model is a fault indicated? application transport network data link physical 35/68 Compared with IDS systems, what can IPS systems do to provide further protection of computer systems? detect potential attacks stop the detected attack from executing update OS patches for computer systems scan computer systems for viruses and spyware 36/68 What is the result when the command security passwords min-length 8 is entered into a router? All new passwords are required to be a minimum of 8 characters in length All current passwords are now required to be a minimum of 8 characters in length Enable passwords must be at least 8 characters but line passwords are unaffected Nothing will happen until the command service password-encryption is entered. Then all future passwords must have a minimum of 8 characters 37/68 Which statement accurately describes a role that is played in establishing a WAN connection? ISDN and ATM are circuit-switched technologies that are used to establish on demand a path through the service provider network. Data link layer protocols like PPP and HDLC define how data is encapsulated for transmission across a WAN link. A packet-switching network establishes a dedicated circuit between nodes for the duration of the communication session. Frame Relay switches are normally considered to be customer premises equipment (CPE) and are maintained by local administrators. 38/68 Which IP address and wildcard mask combination can be used in an ACL statement to match the 172.16.0.0/30 network? 172.16.0.0 0.0.0.1 172.16.0.0 0.0.0.3 172.16.0.0 0.0.0.7 172.16.0.0 255.255.255.252 39/68 Refer to the exhibit. What is placed in the address field in the header of a frame that will travel from the Orlando router to the DC router? DLCI 123 DLCI 321 10.10.10.25 10.10.10.26 MAC address of the DC router 40/68 What is the function of an intrusion detection system on a network? to restrict access to only authorized users to detect attacks against a network and send logs to a management console to prevents attack against the network and provide active defense mechanisms to detect and prevent most viruses and many Trojan horse applications from spreading in the network 41/68 Which two devices can be used by teleworkers who need to connect to the company network across the PSTN for a few hours a day? Hint: 2 choices router CSU/DSU DSL modem cable modem access server dialup modem 42/68 What will be the result of adding the command ip dhcp excluded-address 10.10.4.1 10.10.4.5 to the configuration of a local router that has been configured as a DHCP server? Traffic that is destined for 10.10.4.1 and 10.10.4.5 will be dropped by the router. Traffic will not be routed from clients with addresses between 10.10.4.1 and 10.10.4.5. The DHCP server will not issue the addresses ranging from 10.10.4.1 to 10.10.4.5. The router will ignore all traffic that comes from the DHCP servers with addresses 10.10.4.1 and 10.10.4.5. 43/68 What type of ACL can be used to force a user to authenticate to the router before accessing a network? standard dynamic reflexive time-based 44/68 Which statement about a VPN is true? VPN link establishment and maintenance is provided by LCP. DLCI addresses are used to identify each end of the VPN tunnel. VPNs use virtual Layer 3 connections that are routed through the Internet. Only IP packets can be encapsulated by a VPN for tunneling through the Internet. 45/68 Refer to the exhibit. A network administrator is trying to backup the IOS software on R1 to the TFTP server. He receives the error message that is shown in the exhibit, and cannot ping the TFTP server from R1. What is an action that can help to isolate this problem? Use correct source file name in the command. Verify that the TFTP server software is running. Make sure that there is enough room on the TFTP server for the backup. Check that R1 has a route to the network where the TFTP server resides. 46/68 A network administrator has changed the VLAN configurations on his network switches over the past weekend. How can the administrator determine if the additions and changes improved performance and availability on the company intranet? Conduct a performance test and compare with the baseline that was established previously. Interview departmental secretaries and determine if they think load time for web pages has improved. Determine performance on the intranet by monitoring load times of company web pages from remote sites. Compare the hit counts on the company web server for the current week to the values that were recorded in previous weeks. 47/68 An administrator issues the command show interfaces s0/1/0 on a router that is configured for Frame Relay. Which console output may indicate an LMI mismatch? Serial0/1/0 is administratively down Serial0/1/0 is up, line protocol is up Serial0/1/0 is up, line protocol is down Serial0/1/0 is down, line protocol is down 48/68 Refer to the exhibit. This router is being configured to use SDM, but the SDM interface of the router cannot be accessed. What is the cause of the problem? The VTY lines are not configured correctly. The HTTP timeout policy is not configured correctly. The authentication method is not configured correctly. The username and password are not configured correctly. 49/68 Which network component has the primary function of detecting and logging attacks made against the network? Cisco Security Agent antivirus software scanner intrusion detection system intrusion prevention system 50/68 Refer to the exhibit. The corporate network that is shown has been assigned network 172.16.128.0/19 for use at branch office LANs. If VLSM is used, what mask should be used for addressing hosts at Branch4 with minimal waste from unused addresses? /19 /20 /21 /22 /23 /24 51/68 Which three guidelines would help contribute to creating a strong password policy? Hint: 3 choices Once a good password is created, do not change it. Deliberately misspell words when creating passwords. Create passwords that are at least 8 characters in length. Use combinations of upper case, lower case, and special characters. Write passwords in locations that can be easily retrieved to avoid being locked out. Use long words found in the dictionary to make passwords that are easy to remember. 52/68 Refer to the exhibit. Results of the show vlan and show vtp status commands for switches S1 and S2 are displayed in the exhibit. VLAN 11 was created on S1. Why is VLAN 11 missing from S2? There is a Layer 2 loop. The VTP domain names do not match. Only one switch can be in server mode. S2 has a higher spanning-tree priority for VLAN 11 than S1 does. 53/68 Refer to the exhibit. Every time the administrator reboots this router, the boot process ends in setup mode. What is a possible problem? There is insufficient RAM for the IOS to load on this router. A password recovery process should be done on this router. The bootstrap version and the version of the IOS are different. The IOS image is damaged and must be reloaded using tftpdnld. The configuration register is set to ignore the startup configuration. 54/68 Refer to the exhibit. RIPv2 has been configured on all routers in the network. Routers R1 and R3 have not received any RIP routing updates. What will fix the issue? Enable RIP authentication on R2. Issue the ip directed-broadcast command on R2. Change the subnet masks to 10.11.12.0/8 and 172.16.40.0/16 on R2. Enable CDP on R2 so that the other routers will receive routing updates. 55/68 A system administrator must provide Internet connectivity for ten hosts in a small remote office. The ISP has assigned two public IP addresses to this remote office. How can the system administrator configure the router to provide Internet access to all ten users at the same time? Configure DHCP and static NAT. Configure dynamic NAT for ten users. Configure static NAT for all ten users. Configure dynamic NAT with overload. 56/68 What function does LCP perform in the establishment of a PPP session? What function does LCP perform in the establishment of a PPP session? It carries packets from several network layer protocols. It encapsulates and negotiates options for IP and IPX. It negotiates and sets up control options on the WAN data link. 57/68 Refer to the exhibit. R1 is performing NAT overload for the 10.1.1.0/24 inside network. Host A has sent a packet to Web Server. What is the destination IP address of the return packet from Web Server when received at R1? 10.1.1.2:80 10.1.1.2:1234 172.30.20.1:1234 172.30.20.1:3333 58/68 What name is given to the location where a customer network interfaces with a network that is owned by another organization? CPE DCE local loop demarcation point 59/68 Which type of ACL will permit traffic inbound into a private network only if an outbound session has already been established between the source and destination? extended reflexive standard time-based 60/68 Which three statements accurately describe a security policy? Hint: 3 choices It creates a basis for legal action if necessary It defines a process for managing security violations. It defines acceptable and unacceptable use of network resources. The remote access policy is a component of the security policy that governs acceptable use of e-mail systems. It is kept private from users to prevent the possibility of circumventing security measures It provides step-by-step procedures to harden routers and other network devices. 61/68 What will be the result of adding the command ip dhcp excluded-address 192.168.24.1 192.168.24.5 to the configuration of a local router that has been configured as a DHCP server? Traffic that is destined for 192.168.24.1 and 192.168.24.5 will be dropped by the router. Traffic will not be routed from clients with addresses between 192.168.24.1 and 192.168.24.5. The DHCP server will not issue the addresses ranging from 192.168.24.1 to 192.168.24.5. The router will ignore all traffic that comes from the DHCP servers with addresses 192.168.24.1 and 192.168.24.5. 62/68 An administrator is unable to receive e-mail. While troubleshooting the problem, the administrator is able to ping the local mail server IP address successfully from a remote network and can also successfully ping using the mail server name. At which layer of the OSI model is the problem most likely to be found? physical layer network layer data link layer application layer 63/68 Which data link layer encapsulation protocol is used by default for serial connections between two Cisco routers? ATM Frame Relay HDLC PPP SDLC 64/68 Refer to the exhibit. Partial results of the show access-lists and show ip interface FastEthernet 0/1 commands for router Router1 are shown. There are no other ACLs in effect. Host A is unable to telnet to host B. Which action will correct the problem but still restrict other traffic between the two networks? Apply the ACL in the inbound direction. Apply the ACL on the FastEthernet 0/0 interface Reverse the order of the TCP protocol statements in the ACL. Modify the second entry in the list to permit tcp host 172.16.10.10 any eq telnet. 65/68 Refer to the exhibit. The network administrator creates a standard access control list to prohibit traffic from the 192.168.1.0/24 network from reaching the Internet. The access list must still permit the 192.168.1.0/24 network access to the 192.168.2.0 network. On which router interface and in which direction should the access control list be applied? interface Fa0/0, inbound interface Fa0/0, outbound interface S0/0/0, inbound interface S0/0/0, outbound 66/68 What is an accurate description of CHAP when used with PPP on a serial connection between two routers? A username and password are sent to the peer router, which replies with an accept or reject message. A username and password are sent to the peer router. If these match the configuration in the peer, the peer in turn provides a username and password to t... A challenge message is sent to the peer router, which responds with its username and a calculated value based on a shared secret. This value is then comp... An encrypted password is sent to the peer router, which decrypts it and compares it to a shared secret. If the decrypted passwords match, the peer sends ... 67/68 Refer to the exhibit. A network administrator is trying to connect R1 remotely to make configuration changes. Based on the exhibited command output, what will be the result when attempting to connect to R1? failure to connect due to Telnet not being enabled failure to connect due to incomplete configuration for Telnet a successful connection and ability to make configuration changes a successful connection but inability to make configuration changes because of the absence of an enable secret password 68/68 An administrator issues the command show interfaces s0/1/0 on a router that is configured for Frame Relay. Which console output may indicate an LMI mismatch? Serial0/1/0 is administratively down Serial0/1/0 is up, line protocol is up Serial0/1/0 is up, line protocol is down Serial0/1/0 is down, line protocol is down
