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2021 Mar 400-201 exam engine

Q101. Refer to the exhibit. The Service Provider is deploying Internet service to its VRF customers by using vrf INTERNET. A dedicated firewall provides NAT functionally towards the Internet. Assume that IP address overlapping between VRFs is not an issue. 

Which three configuration steps are required to add Internet service to the VRF customers? (Choose three.) 

A. Export the RD of vrf INTERNET from all customer VRFs. 

B. Originate a default route on PE4 in vrf INTERNET. 

C. Import the RD from vrf INTERNET in all customer VRFs. 

D. Originate a default route on the firewall in vrf INTERNET. 

E. Import the VRF “INTERNET” Route Target in all customer VRFs. 

F. Import the Route Target of all customer VRFs in vrf INTERNET. 

G. Leak all VRF routes to the global routing table. 

Answer: B,C,G 


Q102. Refer to the exhibit. Two MPLS TE tunnels are configured with a total bandwidth guarantee of 100 Mbps. However, Tunnel 1 has a requirement to have one-fifth of this total bandwidth. Which two configurations accomplish this goal? (Choose two.) 

A. Configure tunnel mpls traffic-eng bandwidth 20000 under the Tunnel 1 interface. 

B. Configure bandwidth 20000 under the Tunnel 1 interface. 

C. Configure tunnel mpls traffic-eng bandwidth 80000 under the Tunnel 2 interface. 

D. Configure bandwidth 80 Mbps under physical interfaces in the path PE1-P2-PE2. 

E. Configure bandwidth 20 Mbps under physical interfaces in the path PE1-P1-PE2 

F. Configure bandwidth 80000 under the Tunnel 2 interface. 

Answer: A,C 

Explanation: See Configuration Guide 


Q103. In order to prevent malicious traffic flows, how does BGPsec protect prefix advertisements? 

A. It validates only the originating AS. 

B. It validates routes with encryption. 

C. It validates the AS path. 

D. It validates the next-hop AS. 

Answer: C 


Q104. Which are the four key design requirements for mobile IP backhaul? (Choose four) 

A. network timing distribution and recovery 

B. MPLS-enabled interface 

C. Layer 2 Tunneling 

D. X2 interface turning point 

E. DiffServ QoS 

F. bandwidth 

G. native IPv6 support 

H. mandatory Layer 3 access up to a cell site 

Answer: A,B,E,H 


Q105. Refer to the exhibit. 

In the topology, networks in VRF A use the service provider network for transport. PE1 and PE2 run MP-BGP VPNv4 peering. Links between PE and P routers have MPLS enabled. Links between R1 and P routers do not support MPLS. 

Which technology can be implemented to build MPLS services between P1 and P2? 

A. Layer 3 VPN over GRE Tunnels 

B. L2TPv3 

C. RSVP Signaled Tunneling 

D. MPLS LDP Tunnels 

E. MPLS TE 

Answer: B 


Most up-to-date 400-201 free practice exam:

Q106. Refer to the exhibit. Router RT1 has three equal-cost paths back to the source. Which configuration should be applied in order to load-balance the multicast traffic across all three links. 

A. Create three static multicast routes where each pointing out to one or three interfaces. 

B. Enable PIM multipath. 

C. Create a tunnel interface between RT1 and RT2. Enable PIM on the interface tunnel and disable PIM on the three interfaces part of equal-cost path between RT1 and RT2. 

D. PIM load balance is not possible. PIM only chooses one interface for RFC check and prunes the other interfaces. 

Answer: C 

Explanation: 

Reference: http://www.cisco.com/c/en/us/support/docs/ip/ip-multicast/16450-mcastguide0.html 


Q107. DRAG DROP 

Drag and drop the subslot of the SIP-800 card that is used on Cisco CRS routers on the left to the correct PUM ASIC process on the right. 

Answer: 


Q108. A MPP has been implemented in a Cisco IOS-XR device. Which are the two results that will occur? (Choose two.) 

A. If MPP is disabled and a protocol is activated, all interfaces cannot pass traffic 

B. MPP configuration changes doesn't affect active sessions established before the changes 

C. RP/DRP Ethernet Interfaces are not default out-of-band interfaces 

D. Management traffic to RP from all non-MPP interfaces is dropped 

E. Interfaces configured for out-of-band MPP are still part of global routing/forwarding 

Answer: B,D 


Q109. In an end-to-end Layer 2 service, which technology provides the capability to detect, verify, isolate, and report faults across a provider network? 

A. carrier detect 

B. UDLD 

C. BFD 

D. CFM 

Answer: D 


Q110. Refer to the exhibit. 

ABC and XY2 MPLS VPN customers require Internet access. An ISP engineer deployed the solution on PE1 device. Which statement about CEs connectivity to Internet is true? 

A. Only CE-XYZ will have connectivity 

B. Neither CE will have connectivity, as IAR does not have route back to the subnet used on NAT configuration. 

C. Both CEs will have connectivity. 

D. Only CE-ABC will have connectivity. 

E. Neither CE will have connectivity, as both CEs are using the same subnet used on NAT configuration. 

Answer: D