[Free] Download New Latest (November) Cisco 400-201 Actual Tests 371-380

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QUESTION 371

A service provider with MPLS traffic-eng tunnels is supporting multicast traffic that uses RPF to ensure the source of the sender. The unicast routing table points the source through TE, which does not support multicast and RPF fails. Which action fixes the issue?

 

A.

Use auto-route announce under MPLS TE.

B.

Use multicast-intact under IGP.

C.

Use IGMP snooping.

D.

Use CGMP.

 

Correct Answer: B

 

 

QUESTION 372

You applied this ACL to the interface and several people reported that they were unable to access the network.

 

ipv6 access-list webOnly

permit tcp any 2001:DB8::/32

permit udp any 2001:DB8::/32

deny ipv6 any any

 

Which answer explains why they were unable to access the network?

 

A.

The connections are stale. The users must close and restart their applications.

B.

DNS queries and replies are not working.

C.

The ACL is blocking the operation of the ND process.

D.

DHCP requests are not reaching to the DHCP server.

 

Correct Answer: C

 

 

QUESTION 373

Which two actions of Cisco IOS Software prevent a DDOS attack? (Choose two.)

 

A.

Filter all source addresses from which traffic is not expected in the network, including RFC 1918 addresses.

B.

Filter all traffic for TCP ports in the range 1014-49151.

C.

Enable BFD to have links taken down when there is an attack.

D.

Enable the ip verify reverse-path command on the interface.

E.

Allow only static routes; dynamic routing protocols should not be allowed.

 

Correct Answer: AD

 

 

 

 

 

 

 

 

QUESTION 374

A customer wants the minimum delay for the transit traffic that traverses the service provider core. An engineer realizes that the customer sites are remotely dispersed and wants to give them a specific path through the MPLS core with guaranteed bandwidth and without relying on the shortest path of OSPF as the customer IGP. Which technology will achieve the required result?

 

A.

L2VPN

B.

IPsec tunnel

C.

MPLS TE tunnel

D.

L3VPN

E.

mGRE with extensions

 

Correct Answer: C

 

 

QUESTION 375

Which three options are reasons to deploy BFD? (Choose three.)

 

A.

BFD is a fast hello protocol that exhibits lower overhead than aggressive hellos.

B.

BFD is a fast hello protocol that provides reaction time under a second.

C.

BFD is a fast hello protocol that provides reaction time over a second.

D.

BFD provides fast converges to Layer 2 bundling protocol LAGs.

E.

HSRP protocol supports BFD.

F.

BFD uses a reliable transport for Hello packets, which increases the fast converge if an ACK is not received.

 

Correct Answer: ABE

 

 

QUESTION 376

Which feature provides rapid failure detection times between the forwarding engines, while maintaining low overhead?

 

A.< /font>

Resource Reservation protocol

B.

Precision Time protocol

C.

bidirectional forwarding detection

D.

MPLS traffic engineering

E.

fast hello

F.

nonstop forwarding

 

Correct Answer: C

 

 

QUESTION 377

Which statement about OSPFv3 is true?

 

A.

OSPFv3 runs on per subnet basis instead of per-link.

B.

OSPFv3 instance ID is only locally significant.

C.

OSPFv3 authentication is performed using the authentication field in the OSPFv3 packet header.

D.

OSPFv3 neighbor discovery messages can be sourced only from link-local addresses.

 

Correct Answer: D

 

QUESTION 378

Refer to the exhibit. Why is R4 unable to install any ISIS routes in the routing table?

 

clip_image002

 

A.

ISIS LSP has an authentication issue.

B.

No DR has been elected on this segment.

C.

The metric style is mismatched.

D.

Circuit levels are different.

 

Correct Answer: C

 

 

 

 

 

 

 

 

 

 

 

QUESTION 379

Refer to the exhibit. An ISP engineer has been asked to identity a method to protect the PE and to control the number of BGP prefixes learned from his customers. The BGP session should be dropped if the PE router receives more than 1000 BGP prefixes. A syslog message should be generated when the number of BGP prefixes learned from CE exceeds 850. Which Cisco IOS command should the engineer apply on PE routers?

 

clip_image004

 

A.

neighbor 10.1.1.2 maximum-prefix 1000 85

B.

neighbor 10.1.1.2 maximum-prefix 1000 850

C.

neighbor 10.1.1.2 maximum-prefix 1000 85 warning-only

D.

neighbor 10.1.1.2 maximum-prefix 1000 850 warning-only

 

Correct Answer: A

 

 

QUESTION 380

Which Inter-AS option allows a service provider to provision AToM along with L3VPN provisioning?

 

A.

MPLS VPN Inter-AS with ASBRs exchanging VPN-IPv4 addresses

B.

MPLS VPN Inter-AS with ASBRs exchanging IPv4 routes and MPLS labels

C.

MPLS VPN Inter-AS Option AB

D.

back-to-back VRFs

 

Correct Answer: B

 

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