Cisco CCDE 400-007 Questions & Answers

• Question 181:

  Company XYZ network runs IPv4 and IPv6 and they want to Introduce a multidomain, multicast-based network. The new design should use a flavor of PIM that forwards traffic using SPT. Which technology meets this requirement?

  A. PIM-DM

  B. PIM-SM

  C. PIM-SSM

  D. BIDIR-PIM

  Correct Answer: C

• Question 182:

  You are designing a large-scale DMVPN network with more than 500 spokes using EIGRP as the IGP protocol. Which design option eliminates potential tunnel down events on the spoke routers due to the holding time expiration?

  A. Increase the hold queue on the physical interface of the hub router.

  B. Increase the hold queue on the tunnel interface of the spoke routers

  C. Increase the hold queue on the tunnel interface of the hub router

  D. Apply QoS for pak_priority class

  E. Increase the hold queue on the physical interface of the spoke routers.

  Correct Answer: C

• Question 183:

  A legacy enterprise is using a Service Provider MPLS network to connect its head office and branches. Recently, they added a new branch to their network. Due to physical security concerns, they want to extend their existing IP CCTV network of the head office to the new branch, without any routing changes in the network. They are also under some time constraints.

  What is the best approach to extend the existing IP CCTV network to the new branch, without incurring any IP address changes?

  A. L2TPv3

  B. VXLAN

  C. EoMPLS

  D. GRE

  Correct Answer: A

• Question 184:

  When an SDN-based model is used to transmit multimedia traffic, which aspect should an architect consider while designing the network?

  A. QoE estimation

  B. security

  C. traffic patterns

  D. flow forwarding

  Correct Answer: A

• Question 185:

  Refer to the exhibit.

  

  OSPF is running as the IGP to provide reachability to all AS100 networks R3 and R4 are the current ABRs at the boundary of OSPF Area0 and Areal Now BGP must be deployed within AS 100 because it will be receiving Internet routes from its eBGP peers (the service provider) connected to R1 and R2.

  What is an optimal solution for this deployment to configure BGP relationships and redistribute BGP learned routes into OSPF?

  A. R5 should be configured as a route reflector for R1, R2, R3 and R4. BGP routes must be redistributed at R1 and R2 into OSPF.

  B. Configuration should be set up with R1 and R2, and R3 in one sub AS, with and R4 in another, and redistribution at R1 and R2.

  C. A full mesh should be deployed between all the routers with mutual redistribution to take place at R1 and R2.

  D. R1, R2, R3 and R4 must be set up with a neighbor relationship with R5 only must not be a route reflector.

  Correct Answer: A

• Question 186:

  Which design benefit of bridge assurance is true?

  A. It supposes a spanning-tee topology change upon connecting and disconnecting a station on a port

  B. It prevents switched traffic from traversing suboptimal paths on the network.

  C. It allows small, unmanaged switches to be plugged into ports of access switches without the risk of switch loops.

  D. It prevents switch loops caused by unidirectional point-to-point link condition on Rapid PVST + and MST

  Correct Answer: D

• Question 187:

  SD-WAN can be used to provide secure connectivity to remote offices, branch offices, campus networks, data centers, and the cloud over any type of IP-based underlay transport network. Which two statements describe SD WAN solutions? (Choose two.)

  A. SD-WAN networks are inherently protected against slow performance.

  B. Control and data forwarding planes are kept separate.

  C. Improved operational efficiencies result In cost savings.

  D. Solutions include centralized orchestration, control, and zero-touch provisioning.

  E. Solutions allow for variations of commodity and specialized switching hardware.

  Correct Answer: BD

  Reference: https://techacad.net/what-is-sd-wan-software-defined-wide-area-network/

• Question 188:

  What are two descriptions of network optimization? (Choose two.)

  A. maintain high availability

  B. proactive network management

  C. network redesign

  D. network health maintenance

  E. identify network requirements

  Correct Answer: AD

  network redesign is a potential outcome of the optimization process.

• Question 189:

  Which two actions must be taken when assessing an existing wireless network implementation for its readiness to support voice traffic? (Choose two.)

  A. Check for high channel utilization.

  B. Check for high roaming delay

  C. Check for latency over wireless

  D. Check for uniform radio coverage across the floors.

  E. Identify frequent TX power changes

  Correct Answer: AB

  A) It can cause jitter

  B) It can cause line drop

  C) Should not be high latency within same network. Little latency still can talk but slower.

  D) No reason to get voice coverage if no wifi data coverage. That's another requirement for greater coverage.

  E) Seldom to care it.

• Question 190:

  Customer XYZ network consists of an MPLS core. IS-IS running as IGP a pair of BGP route reflectors for route propagation, and a few dozens of MPLS-TE tunnels for specific tactical traffic engineering requirements. The customer's engineering department has some questions about the use of the Overload Bit in the IS-IS networks and how it could be used to improve their current network design. Which two concepts about the Overload Bit are true? (Choose two.)

  A. It can be set on a router during the startup process for a fixed period of time

  B. Networks advertised within the LSPs of the respective node will become unreachable

  C. It forces the midpoint MPLS-TE node to reoptimize the primary tunnels going through the OL node.

  D. It can be set on a router until other interacting protocols have signaled convergence.

  E. It is not recommended on BGP Route Reflectors

  Correct Answer: AD