CCNA Exploration 4: Final Exam Answers

1. A network administrator can ping the Perth 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 Perth router to allow remote access?

  • Router(config)# line console 0
    Router(config-line)# login
    Router(config-line)# password cisco
  • Router(config)# line vty 0 4
    Router(config-line)# login

    Router(config-line)# password cisco
  • Router(config)# line virtual terminal
    Router(config-line)# enable login
    Router(config-line)# password cisco
  • Router(config)# line vty 0 4
    Router(config-line)# enable secret
    Router(config-line)# password cisco
  • Router(config)# enable secret cisco
    Router(config)# enable cisco

2. 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


Refer to the exhibit. What is the meaning of the term dynamic in the output of the command?

  • The bandwidth capability of the interface increases and decreases automatically based on BECNs.
  • The Serial0/0/1 interface acquired from a DHCP server.
  • The mapping between DLCI 100 and was learned through Inverse ARP.
  • DLCI 100 will automatically adapt to changes in the Frame Relay cloud.


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.


Refer to the exhibit. R1 is performing NAT overload for the 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?


6. Which option correctly defines the capacity through the local loop guaranteed to a customer by the service provider?

  • BE
  • DE
  • CIR
  • CBIR


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″. What is the problem?

  • The address is already configured on Fa0/0.
  • The default router for the 10Network pool is incorrect.
  • The ip helper-address must be added to Fa0/0 interface.
  • The pool of addresses for the 10Network pool is incorrect.

8. Which data link layer encapsulation protocol is used by default for serial connections between two Cisco routers?

  • ATM
  • Frame Relay
  • HDLC
  • PPP
  • SDLC


Refer to the exhibit. Which statement correctly describes how Router1 processes an FTP request that enters interface s0/0/0 and is destined for an FTP server at IP address

  • The router matches the incoming packet to the statement that was created by the access-list 201 deny icmp any command, continues comparing the packet to the remaining statements in ACL 201 to ensure that no subsequent statements allow FTP, and then the router drops the packet.
  • The router reaches the end of ACL 101 without matching a condition and drops the packet because there is no statement that was created by the access-list 101 permit ip any any command.
  • The router matches the incoming packet to the statement that was created by the access-list 101 permit ip any command and allows the packet into the router.
  • It matches the incoming packet to the statement that was created by the access-list 201 permit ip any any command and allows the packet into the router.

10. Which three guidelines would help contribute to creating a strong password policy? (Choose three.)

  • 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.

11. 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

12. Which IEEE 802.16 broadband wireless technology allows users to connect to the ISP at speeds comparable to DSL and cable?

  • Wi-Fi
  • satellite
  • WiMAX
  • Metro Ethernet

13. 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.

14. 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

15. A router does not load its configuration after a power failure. After running the show startup-configuration command, the adminstrator finds that the original configuration is intact. What is the cause of this problem?

  • The configuration register is set for 0×2100.
  • The configuration register is set for 0×2101.
  • The configuration register is set for 0×2102.
  • The configuration register is set for 0×2142.
  • Boot system commands are not configured.
  • Flash memory is empty causing the router to bypass the configuration in NVRAM


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

17. 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? (Choose two.)

  • 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

18. What are two effective measures for securing routers? (Choose two.)

  • Protect all active router interfaces by configuring them as passive interfaces.
  • Configure remote administration through VTY lines for Telnet access.
  • Use quotes or phrases to create pass phrases.
  • Disable the HTTP server service.
  • Enable SNMP traps.

19. Which two statements are true about IPv6 link local addresses? (Choose two.)

  • They begin with the 2000::/3 prefix.
  • They begin with the FE80::/10 prefix.
  • They are assigned by IANA to an organization.
  • They must be manually configured by the administrator.
  • They are assigned to a host by a stateless autoconfiguration process.

20. An issue of response time has recently arisen on an application server. The new release of a software package has also been installed on the server. The configuration of the network has changed recently. To identify the problem, individuals from both teams responsible for the recent changes begin to investigate the source of the problem. Which statement applies to this situation?

  • Scheduling will be easy if the network and software teams work independently.
  • It will be difficult to isolate the problem if two teams are implementing changes independently.
  • Results from changes will be easier to reconcile and document if each team works in isolation.
  • Only results from the software package should be tested as the network is designed to accommodate the proposed software platform.


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

22. A network administrator is tasked with maintaining two remote locations in the same city. Both locations use the same service provider and have the same service plan for DSL service. When comparing download rates, it is noticed that the location on the East side of town has a faster download rate than the location on the West side of town. How can this be explained?

  • The West side has a high volume of POTS traffic.
  • The West side of town is downloading larger packets.
  • The service provider is closer to the location on the East side.
  • More clients share a connection to the DSLAM on the West side.

23. Where does a service provider assume responsibility from a customer for a WAN connection?

  • local loop
  • DTE cable on router
  • demarcation point
  • demilitarized zone

24. Which technology is used to dynamically map next hop, network layer addresses to virtual circuits in a Frame Relay network?

  • Inverse ARP
  • LMI
  • DLCI
  • FECN

25. An administrator learns of an e-mail that has been received by a number of users in the company. This e-mail appears to come from the office of the administrator. The e-mail asks the users to confirm their account and password information. Which type of security threat does this e-mail represent?

  • cracking
  • phishing
  • phreaking
  • spamming


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.
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