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2021 Mar 400-201 exam answers
Q81. 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?
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
Q82. An engineer is tasked with configuring Lawful-Intercept on the Internet facing routers. Which two security issues must the engineer take into consideration? (Choose two)
A. Default SNMP does not include all the MIB references needed to respond to the request.
B. A new and dedicated loopback interface is required to communicate with the MD device.
C. Encryption might be required depending on the request.
D. The communication between the MD and the Content IAP happens over UDP port 161.
E. QoS and CoPP should be implemented to protect and optimize the tasks.
F. SNMFV2c should be enabled in order to provide the correct message format.
Q83. A company is deciding between an HVR and SVR solution in order to finalize a virtualization project proposal. Which is an advantage of a HVR solution versus a SVR solution?
A. A HVR solution implements dedicated data plane resources.
B. A HVR solution implements shared control plane resources.
C. A HVR solution introduces significant contention of resources.
D. A HVR solution implements dedicated chassis resources.
Comparison of Virtualized Routing Architectures
Category Hardware-Isolated Virtual Router Software-Isolated Virtual Router
Control plane resources (CPU, memory)
Data plane resources (forwarding engine, queues)
Chassis resources (power supplies, blowers, fabric)
Typically shared, but varies depending on degree of virtualization
Connections between virtualized routing entities
Typically internal, but possibly external
Per-chassis scalability (routing adjacencies, prefixes)
Increased with additional logical routers
Unaffected by additional virtual routers
Reference: http://www.cisco.com/en/US/solutions/collateral/ns341/ns524/ns562/ns573/white_paper_c1 1-512753_ns573_Networking_Solutions_White_Paper.html
Q84. Refer to the exhibit.
The prefix 10.1.1.64/28 should be advertised to the PE router, yet the prefix is not being received by the PE. Which configuration should be applied on CE in order to fix this issue?
A. jp prefix-list ROUTES_TO_SP seq 1 permit 10.1.1.64/28
B. router bgp 65000 no network 10.1.1.64 mask 255.255.255.240 network 10.1.1.128 mask 255.255.255.128
C. ip prefix-list ROUTES_TO_SP permit 10.1.1.64/28
D. router bgp 65000 no network 10.1.1.64 mask 255.255.255.240 network 10.1.1.0 mask 255.255.255.0
Q85. Refer to the exhibit.
ABC and XYZ MPLS VPN customers are accruing Internet access. Both CEs are sending traffic to the Internet. Which statement about their connectivity is true?
A. Both CEs will have connectivity.
B. Only CE-XYZ will have connectivity.
C. Neither CEs will have connectivity, as both CEs are using the same NATed subnet.
D. Only CE-ABC will have connectivity.
E. Neither CEs will have connectivity, as IAR does not have route back to the NATed subnet.
Abreast of the times 400-201 free exam questions:
Q86. Which technology is a forwarding decision point in a PE router that provides flexibility to make many Layer 2 flow decisions within an interface?
A. local connect
Q87. 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.
Q88. Two MPLS VPN customers want to acquire Internet access. They make use of overlapping address space but do not want to use NAT on the CPEs. Which action satisfies this requirement?
A. Configure each VRF with a default route in the global table by using a static route toward each customer's range, pointing to the customer interface in the global table.
B. Configure VRF-aware NAT with a default route in the global table for each VRF that requires it
C. Configure a separate PE-CE subinterface that terminates in the global routing table on the PE.
D. Configure the Internet upstream interface inside a VRF, Which becomes an extranet VRF to which customers join and make use of NAT in this VRF.
Q89. Refer to the exhibit.
A company has a requirement to provide communication among remote sites via multipoint GRE tunnels. This communication is not working yet. Which is the root cause of this issue?
A. The key that is used on the DMVPN tunnel between the spoke and hub ends does not match. This causes the tunnel to fail.
B. BGP IPv4 multicast address-family is missing between hub and spoke points.
C. The GRE tunnel is not sourced from a physical interface. The DMVPN traffic does not know where to forward packets.
D. The NHRP network ID does not match in the hub and spoke configuration causing NHRP negotiations to fail and the mGRE to stay down.
Q90. Refer to the exhibit.
Why does R1 not receive a label for 10.0.0.3/32 prefix?
A. R1 does not have an established LDP neighborship with the router announcing the 10.0.0.3/32 prefix.
B. The 10.0.0.3/32 prefix is being null-routed in the downstream neighbor
C. LDP peer is not configured to advertise a label for the 10.0.0.3/32 prefix
D. BGP is not configured to exchange labels with the BGP peer advertising 10.0.0 3/32 prefix