Exam Code: 400-201 (Practice Exam Latest Test Questions VCE PDF)
Exam Name: CCIE SP Written v4.0
Certification Provider: Cisco
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Q21. A Service Provider connects to a client site that has two CEs. These CEs have a backdoor link for backup. OSPF is used as the routing protocol in this environment. You want to ensure that client traffic prefers the service provider connections for routing instead of the secondary connection. Which option describes the default behavior and the action that accomplishes your goal? 

A. The routes to the Service Provider are not preferred, due to the increased OSPF cost through the service provider network. Ensure that the cost on the links to the service provider are lower than the secondary connection. 

B. The routes to the Service Provider are seen as external type 1 in the OSPF database. Configure a domain ID that is the same across all PEs, to ensure that customers see routes as intra-area. 

C. The routes to the Service Provider are seen as inter-area OSPF routes through the network. Configure a sham link to create a new intra-area path across the service provider network between the PE routers that service the client. 

D. The routes to the Service Provider are seen as equal and cause nondeterministic traffic patterns. Ensure that the secondary connection has a higher cost than the links to the service provider. 

Answer:

Explanation: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_ospf/configuration/15-sy/iro-15-sy-book/iro-sham-link.html#GUID-BEA06826-713E-4F71-B4A4-9E3DA3BAC3FC 


Q22. Refer to the exhibit. Both MPLS TE tunnel 14 and MPLS TE tunnel 124 pass over the same physical links. Which configuration on R1 enables TE 14 to be the primary tunnel and TE 124 to become active when TE 14 is admin disabled? 

A. Interface Tunnel14 

tunnel mpls traffic-eng priority 3 1 

Interface Tunnel124 

tunnel mpls traffic-eng priority 5 4 

B. Interface Tunnel14 

tunnel mpls traffic-eng priority 4 1 

`Interface Tunnel124 

tunnel mpls traffic-eng priority 3 2 

C. Interface Tunnel14 

tunnel mpls traffic-eng priority 7 7 

Interface Tunnel124 

tunnel mpls traffic-eng priority 1 1 

D. Interface Tunnel14 

tunnel mpls traffic-eng priority 3 2 

Interface Tunnel124 

tunnel mpls traffic-eng priority 4 1 

Answer:


Q23. In a Layer 2 VPN service, which is the default behavior of an EVC-based platform with regards to VLAN manipulation? 

A. keeps the VLAN tag of the incoming frame 

B. attaches two VLAN tags to the incoming frame 

C. removes the VLAN tag from the incoming frame 

D. removes all the VLAN tags from the incoming frame 

E. sets the VLAN tag of the incoming frame 

Answer:

Explanation: http://www.cisco.com/c/en/us/support/docs/routers/asr-9000-series-aggregation-services-routers/116453-technote-ios-xr-l2vpn-00.html#anc7 


Q24. When troubleshooting a DoS attack, a support engineer finds a huge number of packets that are destined to one of the core routers interface IP address. By the time the packets reach this core router, they have a TTL of 0. Based on Cisco platform running IOS 15.3S, which technique is most effective in resolving this problem 

A. Configure LPTS. 

B. Configure an ACL on the core router interface. 

C. Configure CoPP on the core router. 

D. Configure policing on PE routers. 

E. Configure a receive ACL on the core router. 

Answer:


Q25. 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:


Q26. Refer to the exhibit. OSPFv3 is already running, and R1 has added a new subnet (loopback 11). What is the reason code on R4 when executing the command show ipv6 ospf statistics? 

A. P (partial) 

B. N (network) 

C. R (router) 

D. L (link) 

Answer:


Q27. 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 


Q28. A network engineer wants to deploy a solution that allows for 200 DS1 s and 100 DS0s that are multiplexed to a single interface on a Cisco 7600 Series Router. Which interface type satisfies this requirement? 

A. Channelized T3/E3 (DS0) 

B. Channelized OC-12/STM-4 

C. OC-12/STM-4 

D. OC-48c/STM-16 

Answer:


Q29. 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:

Explanation: 

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


Q30. Which multicast feature listens multicast conversations maintaining a map in order to control which ports receive specific multicast traffic? 

A. Bidirectional PIM 

B. Source Specific Multicast 

C. PIM assertion 

D. IGMP snooping 

Answer: