Cisco 400-201 Exam Preparation Material

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Question No. 1

Two customers have routers that run OSPF and belong to the same OSPF are

a. These two routers are connected by an MPLS backbone and by a low-bandwidth point-to-point link (used as a backup link). Which two minimum configurations are required to connect these two routers? (Choose two.)

Answer: B, E

Question No. 2

Assume that the PEs are separated by Multiple P routers.

How many labels should the ingress PE push for 6PE functionality?

Answer: D

A PE device on receiving the IPv6 prefix from CE by routing protocol will assign a label and advertise through BGP to other PE devices which in turn will be advertised to remote CE devices.

This label information will be used to switch the packet through MPLS cloud. 6PE implementation will have minimum 2 labels imposed, top label being the one to identify the remote PE while bottom label to identify the IPv6 prefix.

Question No. 3

How does BGPsec protect advertisements by preventing from the malicious traffic flows?

Answer: A

Question No. 4

VoIP bearer traffic is typically marked to which DSCP value?

Answer: F

Question No. 5

What are two advantages of Cisco IOS XR Software over Cisco IOS Software? (Choose two.)

Answer: B, E

Question No. 6

Refer to the exhibit.

Refer to the exhibit. LDP session protection is enabled between all LDP adjacencies. Which impact occurs on the LDP session between CRS-P2 and CRS-P4 if the direct link between them goes down?

Answer: A

Question No. 7

Two OSPF neighbor routers are stuck in the EXSTART state. After a while, the neighborship goes down. A network engineer is debugging the issue when both routers show the OSPF log message “too many retransmissions.” What is the possible root cause?

Answer: C

Question No. 8

Which MQC-based output queueing method is designed to support multiple traffic classes including VoIP traffic, mission-critical traffic, bulk traffic, interactive traffic and default class traffic?

Answer: D

Question No. 9

For the Cisco ASR 1000 Series, which module provides the physical and electrical terminal for the shared port

Answer: A

Question No. 10

Which three of these can be a forwarding equivalence class? (Choose three)

Answer: C, D, E

Question No. 11

In Cisco IOS XR architecture, what is lightweight messaging?

Answer: D

Question No. 12

What protocol is used for Path Setup in MPLS traffic engineering?

Answer: E

Question No. 13

Refer to the exhibit.

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

Answer: C

Question No. 14

Which type of AAL does ATM utilize to deliver CBR traffic?

Answer: D

An ATM Adaptation layer 1 or AAL1 is used for transmitting Class A traffic, that is, real-time, constant bit rate, connection oriented traffic (example- uncompressed audio and video). Bits are fed in by the application at constant rate and must be delivered to other end with minimum delay, jitter or overhead. The input is stream of bits without message boundaries. For this traffic, error detection protocols cannot be used since timeouts and retransmission causes delay but the missing cells are reported to the application, that must take its own action to recover from them.

Question No. 15

SNMPv3 provides which three security features?(Choose three)

Answer: A, E, F

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