1. Which Frame Relay flow control mechanism is used to signal routers that they should reduce the flow rate of frames? DE BE CIR FECN CBIR 2. 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. 3. Which data link layer encapsulation protocol is used by default for serial connections between two Cisco routers? ATM Frame Relay HDLC PPP SDLC 4. An administrator issues the command confreg 0×2142 at the rommon 1> prompt. What is the effect when this router is rebooted? Contents in RAM will be erased. Contents in RAM will be ignored. Contents in NVRAM will be erased. Contents in NVRAM will be ignored. 5. Which type of network attack exploits vulnerabilities in the compromised system with the intent of propagating itself across a network? virus worm Trojan horse man-in-the-middle 6. Which important piece of troubleshooting information can be discovered about a serial interface using the show controllers command? queuing strategy serial cable type interface IP address encapsulation method 7. CCNA Exam Ans wers | CC NA Pack et Tra cer He lp: CCNA 4 Final Ex... http:/ /ccna xplor ation. blogs pot.fr /2012/ 10/cc na-4-f inal- exam-a nswer s-... 1 sur 13 01/05/2013 16:02
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Refer to the exhibit. In the partial router configuration that is shown, what is the purpose of
access list BLOCK_XYZ?
to prevent source IP address spoofing by hosts on the Fa0/0 LAN
to block access by Fa0/0 LAN hosts to all network services beyond the routerto prevent users on the Fa0/0 LAN from opening Telnet sessions on the router
to secure Fa0/0 hosts by allowing only locally sourced traffic into the Fa0/0 LAN
17.
Refer to the exhibit. A network administrator notices that three VLANs created on SW1 do
not show in SW3. Based on output from the show vtp status and show running-config
commands, what is the cause of the problem in the SW3 configuration? VTP version 2 is
disabled.
The VTP mode is misconfigured.
The configure revision number for VTP does not match.
Trunk mode is not configured on FastEthernet 0/1 and 0/2.
18.
NA Exam Answers | CCNA Packet Tracer Help: CCNA 4 Final Ex... http://ccnaxploration.blogspot.fr/2012/10/ccna-4-final-exam-answers-...
Refer to the exhibit. What statement is true about the core router devices?
They use multiport internetworking devices to switch traffic such as Frame Relay, ATM, or
X.25 over the WAN.
They provide internetworking and WAN access interface ports that are used to connect to the
service provider network.
They provide termination for the digital signal and ensure connection integrity through error
correction and line monitoring.
They support multiple telecommunications interfaces of the highest speed and are able to
forward IP packets at full speed on all of those interfaces.
19. When would the multipoint keyword be used in Frame Relay PVCs configuration?
when global DLCIs are in use
when using physical interfaces
when multicasts must be supported
when participating routers are in the same subnet
20. A light manufacturing company wishes to replace its DSL service with a non-line-of-sight
broadband wireless solution that offers comparable speeds. Which solution should the
customer choose?
Wi-Fi
satellite
WiMAX
Metro Ethernet
21.
Refer to the exhibit. Which configuration command would result in the output in the exhibit?
ip nat inside source static 10.1.200.254 172.16.76.3
ip nat inside source static 10.1.200.254 192.168.0.10
ip nat inside source static 172.16.76.3 10.1.200.254
ip nat inside source static 172.16.76.3 192.168.0.10
ip nat inside source static 192.168.0.10 172.16.76.3
ip nat inside source static 192.168.0.10 10.1.200.254
22. A recently patched application server is experiencing response time problems. Thenetwork on which the application server is located has been experiencing occasional outages
that the network team believes may be related to recent routing changes. Network and
application teams have been notified to work on their respective issues. Which statement
applies to this situation?
Only results from the software package should be tested as the network is designed to
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40. 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 successfully resolve the mail server name to an IP address via the use of
the nslookup command. At what OSI layer is the problem most likely to be found?
physical layer
data link layer
network layer
application layer
41. What are two main components of data confidentiality? (Choose two.)
checksum
digital certificates
encapsulation
encryption
hashing
42.
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 theTFTP 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.
43. When NAT is in use, what is used to determine the addresses that can be translated on a
Cisco router?
access control list
routing protocol
inbound interface
ARP cache
44.
NA Exam Answers | CCNA Packet Tracer Help: CCNA 4 Final Ex... http://ccnaxploration.blogspot.fr/2012/10/ccna-4-final-exam-answers-...