[Free] Download New Latest (June 2016) Cisco 400-201 Practice Test 291-300

Ensurepass

QUESTION 291

What Cisco IOS feature examines packets received to make sure that the source address and interface are in the routing table and match the interface that the packet was received on?

 

A.

MPLS Traffic Engineering

B.

Receive ACL

C.

Unicast RPF

D.

Authentication

E.

Dynamic access-lists

 

Correct Answer: C

 

 

QUESTION 292

RFC 3270 describes Differentiated Services (Diff-Serv) over Multi-Protocol Label Switching (MPLS) networks. Which model alters Differentiated Services (Diff-Serv) code points set in different Differentiated Services (Diff-Serv) domain?

 

A.

None of the above will alter Differentiated Services (Diff-Serv) code points set in different Differentiated Services (Diff-Serv) domain.

B.

Uniform model

C.

Pipe Model

D.

Short Pipe

 

Correct Answer: B

 

 

QUESTION 293

How many messages does Internet Key Exchange (IKE) use to negotiate SA characteristics when running in aggressive mode?

 

A.

3 messages

B.

4 messages

C.

5 messages

D.

2 messages

E.

6 messages

 

Correct Answer: A

Explanation:< /b>

The Aggressive Mode is an exchange in the first phase of IKE/ISAKMP (The ISAKMP Aggressive Exchange) is like the Main Mode, but some messages are embedded to the others. The first message proposes the policy, and passes data for key-exchange, the nonce and some information for identification. The second message is a response which authenticates the responder and concludes the policy and key-exchange. At this point all the information for encryption key for the ISAKMP SA is exchanged and last the message could be encrypted, but doesn’t have to be. The last message is used for authenticating the initiator and provides a proof of participation in the exchange. The identity of the responder could not be protected, but by encrypting the last message the identity of the initiator is protected.

 

 

QUESTION 294

Which of the following statements regarding Selective Packet Discard (SPD) is correct?

 

A.

Selective Packet Discard (SPD) is a mechanism to drop non-routing packets instead of routing packets when the process level queue is congested.

B.

Selective Packet Discard (SPD) is a mechanism to drop normal IP packets instead of VOIP packets when the link is overloaded.

C.

None of above.

D.

Selective Packet Discard (SPD) is a mechanism to drop Frame Relay frames with the DE bit set instead of Frame Relay frames DE bits without being set when the link is overloaded.

E.

Selective Packet Discard (SPD) is a mechanism to drop packets with low IP precedence instead of packets with high IP precedence when the link is overloaded.

 

Correct Answer: A

 

 

QUESTION 295

DSCP value “101110” looks like which IP Precedence value to non-DiffServ compliant devices?

 

A.

IP Precedence 6

B.

IP Precedence 4

C.

IP Precedence 3

D.

IP Precedence 5

E.

IP Precedence 2

F.

IP Precedence 7

 

Correct Answer: D

 

 

QUESTION 296

In the Apache Web Server configuration, the command KeepAlive ON is used to

 

A.

Allow a CSS to probe the server

B.

Allow a connection to be closed with a TCP RESET

C.

Allow persistent connections

D.

Allow the use of HTTP HEAD request

 

Correct Answer: C

 

 

 

 

 

QUESTION 297

How many bits does EXP occupy in the MPLS label header?

 

A.

8

B.

4

C.

3

D.

1

E.

2

 

Correct Answer: C

 

 

QUESTION 298

Which of the following IOS commands cause syslog messages to be stamped with time and dates?

 

A.

logging datetime on

B.

service timestamps log datetime

C.

service logging datetime

D.

logging timestamps on

E.

logging trap datetime

 

Correct Answer: B

Explanation:

Service timestamps

To configure the system to apply a time stamp to debugging messages or system logging messages, use the service timestamps command in global configuration mode. To disable this service, use the no form of this command.

Service timestamps [debug | log] [uptime | datetime [msec]] [localtime] [show-timezone] [year] no service timestamps [debug | log]

 

 

QUESTION 299

In which modes does selective packet discard (SPD) operate? (Choose three.)

 

A.

discard

B.

random

C.

normal

D.

full

E.

select

 

Correct Answer: BCD

 

 

QUESTION 300

Which of the following statements regarding Control Plane Policing (CoPP) is correct? (Choose three.)

 

A.

Control Plane Policing (CoPP) addresses the need to protect the management planes, ensuring routing stability, availability, and critical packet delivery.

B.

Control Plane Policing (CoPP) leverages MQC to define traffic classification criteria and to specify configurable policy actions for the classified traffic.

C.

Control Plane Policing (CoPP) uses a dedicated “control-plane” command via the Modular QoS CLI (MQC) to provide filtering and rate limiting capabilities.

D.

Control Plane Policing (CoPP) uses “service policy” command under relevant interfaces to filter DOS packet to protect routing packets.

E.

Control Plane Policing (CoPP) protects the transit management and data traffic through the router.

 

Correct Answer: ABC

 

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