Testking cisco 642-821
Vendor: cisco
Exam Code: 642-821
Exam Name: CCNP’s Cisco Internetwork Troubleshooting (CIT) (CCNP )
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642-821 Q & A with Explanations + 642-821 Study Guide + 642-821 Preparation Labs
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Question: 6
Which two statements about the Cisco Autosecure feature are true? (Choose two.)
A – All passwords entered during the Autosecure configuration must be a minimum of 8
characters in length.
B – Cisco 123 would be a valid password for both the enable password and the enable secret
commands.
C – The auto secure command can be used to secure the router login as well as the NTP and
SSH protocols.
D – For an interactive full session of AutoSecure, the auto secure login command should be used.
E – If the SSH server was configured, the 1024 bit RSA keys are generated after the auto secure
command is enabled.
Answer: C, E
Question: 7
Which three statements are correct about MPLS-based VPNs? (Choose three.)
A – Route Targets (RTs) are attributes attached to a VPNv4 BGP route to indicate its VPN
membership.
B – Scalability becomes challenging for a very large, fully meshed deployment.
C – Authentication is done using a digital certificate or pre-shared key.
D – A VPN client is required for client-iniated deployments.
E – A VPN client is not required for users to interact with the network.
F- An MPLS-based VPN is highly scalable because no site-to-site peering is required.
Answer: A, E, F
Question: 8
Which IPsec mode will encrypt a GRE tunnel to provide multiprotocol support and reduced
overhead?
A – 3DES
B – multipoint GRE
C – tunnel
D – transport
Answer: D
Question: 9
Which two statements are true about broadband cable (HFC) systems? (Choose two.)
A – Cable modems only operate at Layer 1 of the OSI model.
B – Cable modems operate at Layers 1 and 2 of the OSI model.
C – Cable modems operate at Layers 1, 2, and 3 of the OSI model.
D – A function of the cable modem termination system (CMTS) is to convert the modulated signal
from the cable modem into a digital signal.
F – A function of the cable modem termination system is to convert the digital data stream from
the end user host into a modulated RF signal for transmission onto the cable system.
Answer: B, D
Question: 10
Refer to the exhibit.
Which two statements about the AAA configuration are true? (Choose two.)
A – A good security practice is to have the none parameter configured as the final method used to
ensure that no other authentication method will be used.
B – If a TACACS+ server is not available, then a user connecting via the console port would not
be able to gain access since no other authentication method has been defined.
C – If a TACACS+ server is not available. then the user Bob could be able to enter privileged
mode as long as the proper enable password is entered.
D – The aaa new-model command forces the router to override every other authentication method
previously configured for the router lines.
E – To increase security, group radius should be used instead of group tacacs+.
F – Two authentication options are prescribed by the displayed aaa authentication command.
Answer: D, F
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Questions and Answers : 220 Q&As
Updated: 2008-12-06
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