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2016 Sep peter electronic br 400-201:

Q91. An engineer needs to implement changes to Router_A during a maintenance window. The engineer first saves the running-configuration of all routers to the local disk0, then applies the required configuration changes. However, during post checks, the engineer realizes the implementation was deployed on Router_B instead. 

Which command should the engineer apply to reverse the changes made during the maintenance window? 

A. configure revert disk0:myconfig-1 

B. configure reload ditk0:myconfig-1 

C. configure copy disk0:myconfig-1 

D. configure replace disk0:myconfig-1 

Answer: D 

Explanation: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/config-mgmt/configuration/15-sy/config-mgmt-15-sy-book/cm-config-rollback-confirmed-change.html 


Q92. A service provider is designing control policies at the customer edge of the network, in order to prevent usage that exceeds the contracted terms A new client that is contracted for only 2 Gbps is connecting to the service provider edge with a 10 Gbps interface. Which two OoS strategies meet the design goal? (Choose two.) 

A. On the customer edge device, enable policing on the interface that is connected to the service provider. 

B. On the service provider edge, enable WRED on the customer port. 

C. On the customer edge, enable WRED on the interface that is connected to the service provider 

D. I On the service provider edge, enable policing on the customer port 

E. the customer edge device, enable traffic shaping on the interface that is connected to the service provider. 

F. C On the service provider edge, enable traffic shaping on the customer port 

Answer: D,E 


Q93. Refer to the exhibit. Why is R3 unable to install 1.1.1.1/32 in its routing table? 


A. 11.11.11.11/32 exists in the routing table, so the conditional advertising is not working. 

B. The route is filtered out by the ip prefix-list ROUTE-IN command. 

C. 11.11.11.11/32 is advertising in the BGP table, so conditional advertising is not working. 

D. The bgp redistribute-internal command is missing under the R2 BGP process. 

Answer: B 


Q94. In Multicast Inter-AS VPN context, which BGP attribute should you use to overcome the Option B limitation due to a rewritten originator next-hop address in the network? 

A. connector 

B. AS path 

C. weight 

D. originator 

Answer: A 


Q95. What are three actions that the control word performs in MPLS AToM? (Choose three.) 

A. is used to identify the VC label 

B. is used for padding small packets 

C. preserves the sequence of the transported frames 

D. facilitates the load balancing of AToM packets in the MPLS backbone network 

E. carries control bits of the Layer 3 header of the transported protocol 

F. is used to identify the tunnel label 

Answer: B,C,D 

Explanation: https://ccdewiki.wordpress.com/2013/05/28/control-word-on-atom/ 


400-201 exam guide

Abreast of the times fip-400-201:

Q96. Refer to the exhibit. 


Two ISPs have decided to implement MPLS Inter-AS TE. All routers have full reachability to all subnets. RSVP and MPLS TE have been enabled in all routers interfaces in both ISPs, yet Tunnel 14 is not up Which configuration will fix this issue? 

A. On R1, apply the command: 

interface Tunnel14 

mpls traffic-eng passive-interface nbr-te-id 10.10.10.4 nbr-igp-id ospf 10.10.10.1 

B. On R1, apply the command: 

interface Tunnel14 

mpls traffic-eng passive-interface nbr-te-id 10.10.10.4 nbr-igp-id isis 10.0000.0000.0004.00 

C. On R1. apply the command: 

interface Tunnel 14 

tunnel mpls traffic-eng path-option 1 dynamic 

D. I On R2. apply the command: 

interface Fa0/1 

ip router isis 

router ospf 1 

redistribute isis subnets 

On R3, apply the command: 

interface Fa0/1 

ip ospf 1 area 0 

router isis 

redistribute ospf 1 

E. On R2, apply the command: 

interface Fa0/1 

mpls traffic-eng passive-interface nbr-te-id 10.10.10.3 nbr-igp-id ospf 10.10.10.2 

On R3, apply the command: 

interface Fa0/1 

mpls traffic-eng passive-interface nbr-te-id 10.10.10.2 nbr-igp-id isis 10.0000.0000.0003.00 

F. On R2, apply the command: 

interface Fa0/1 

mpls traffic-eng passive-interface nbr-te-id 10.10.10.3 nbr-igp-id isis 10.0000.0000.0003.00 

On R3, apply the command: 

interface Fa0/1 

mpls traffic-eng passive-interface nbr-te-id 10.10.10.2 nbr-igp-id ospf 10.10.10.2 

Answer: F 


Q97. Refer to the exhibit . 

A network engineer is troubleshooting a packet over SONET connection between Router A and Router B. What is causing the line protocol to be down? 


A. The keepalive must be set on both sides 

B. The POS CRC must be set on both sides. 

C. There is an encapsulation mismatch 

D. There is an MTU mismatch. 

Answer: C 


Q98. Due to recent acquisitions, a company’s MPLS infrastructure is growing very quickly. Concerns arise about labeling each and every IP address on the P router. Which command would significantly reduce the label allocations without compromising LDP functionalities? 

A. ip prefix-list List1 deny prefix/prefix_length 

mpls ldp label 

allocate global prefix-list List1 

B. mpls ldp label 

allocate global host-routes 

C. access-list 1 permit subnet wildcard 

mpls ldp neighbor neighbor_ip labels accept 3 

D. mpls ldp password required for 10 

access-list 10 permit host_ip_1 

access-list 10 permit host_ip_2 

access-list 10 permit host_ip_n 

Answer: A 


Q99. When IPv6 is enabled on an interface, which three multicast addresses does the configured interface automatically join? (Choose three.) 

A. FF01::2 

B. FEC0::1 

C. FF02:0:0:0:0:1:FF00::/104 

D. FF02::1 

E. FF01::1 

F. FF02::2 

G. FF02::D 

H. FF02::5 

Answer: C,D,F 

Explanation: 

http://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/4_1/configuration/guides/cli_4_1/clibook/ipv6.pdf https://www.iana.org/assignments/ipv6-multicast-addresses/ipv6-multicast-addresses.xml 


Q100. Which are the three benefits of using the Yang model? (Choose three.) 

A. Reduce lab footprint 

B. Improve access to resources 

C. Support interoperability that provides a standard way to model management data 

D. Support simplified network management applications 

E. Provide a scale virtual lab environment 

F. Support programmatic interfaces 

Answer: C,D,F 

Explanation: https://tools.ietf.org/html/rfc6020#page-11 



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