Cisco CCDE 400-007 Questions & Answers

• Question 91:

  Retef to the exhibit.

  

  This network is running OSPF and EIGRP as the routing protocols Mutual redistribution of the routing protocols has been contoured on the appropriate ASBRs The OSPF network must be designed so that flapping routes m EIGRP domains do not affect the SPF runs within OSPF The design solution must not affect the way EIGRP routes are propagated into the EIGRP domains.

  Which technique accomplishes the requirement?

  A. route summarization the ASBR interfaces facing the OSPF domain

  B. route summarization on the appropriate ASBRS.

  C. route summarization on the appropriate ABRS.

  D. route summarization on EIDRP routers connecting toward the ASBR

  Correct Answer: B

  It says to not affect how EIGRP is routing, hence route summarization on the appropriate ASBRs

• Question 92:

  Refer to the exhibit.

  

  The enterprise customer wants to stream one-way video from their head office to eight branch offices using multicast. Their current service provider provides a Layer3 VPN solution and manages the CE routers, but they do not currently support multicast. Which solution quickly allows this multicast traffic to go through while allowing for future scalability?

  A. Enable a GRE tunnel between nodes CE1 and CE2

  B. Enable a GRE tunnel between nodes C2 and C4

  C. Enable a GRE tunnel between nodes C1 and C4

  D. Implement hub and spoke MPLS VPN over DMVPN (also known as 2547o DMVPN) between CE1 and CE2

  E. The service provider must provide a Draft Rosen solution to enable a GRE tunnel between nodes PE1 and PE2

  Correct Answer: B

  https://www.cisco.com/c/en/us/support/docs/ip/ip-multicast/43584-mcast-over-gre.html

• Question 93:

  In an OSPF network with routers connected together with Ethernet cabling, which topology typically takes the longest to converge?

  A. partial mesh

  B. full mesh

  C. ring

  D. squared

  E. triangulated

  Correct Answer: C

  Ring topology each router first needs to exchange LSAs with its 2 direct and other neighbors and this will continue until all neighbors sync up their LSDB

• Question 94:

  Refer to the exhibit.

  

  An architect must design an enterprise WAN that connects the headquarters with 22 branch offices. The number of remote sites is expected to triple in the next three years. The final solution must comply with these requirements:

  Only the loopback address of each of the enterprise CE X and Y routers must be advertised to the interconnecting service provider cloud network. The transport layer must carry the VPNv4 label and VPN payload over the MP- BGP control

  plane.

  The transport layer must not be under service provider control.

  Which enterprise WAN transport virtualization technique meets the requirements?

  A. EIGRP Over the Top

  B. MPLS over BGP over multipoint GRE

  C. DMVPN per VRF

  D. point-to-point GRE per VRF

  Correct Answer: B

• Question 95:

  Which two aspects are considered when designing a dual hub dual DMVPN cloud topology? (Choose two )

  A. will only work with single-tier headend architecture

  B. hub sites must connect to both DMVPN clouds

  C. recommended for high availability

  D. spoke-to-spoke traffic will transit the hub unless spokes exchange dynamic routing directly

  E. requires all sites to have dual Internet connections

  Correct Answer: AC

• Question 96:

  A European government passport agency considers upgrading its IT systems to increase performance and workload flexibility in response to constantly changing requirements. The budget manager wants to reduce capital expenses and IT staff and must adopt the lowest-cost technology. Which technology choice is suitable?

  A. on premises

  B. private cloud

  C. public cloud

  D. hybrid cloud

  Correct Answer: B

  note that private cloud can be deployed in a public cloud also. azure is s good example. This solution offers reduction in capex, security and low cost. It is an opex model since it it based on subscription.

• Question 97:

  A Tier-3 Service Provider is evolving into a Tier-2 Service Provider due to the amount of Enterprise business it is receiving The network engineers are re-evaluating their IP/MPLS design considerations in order to support duplicate/overlapping IP addressing from their Enterprise customers within each Layer3 VPN. Which concept would need to be reviewed to ensure stability in their network?

  A. Assigning unique Route Distinguishers

  B. Assigning unique Route Target ID'S

  C. Assigning unique IP address space for the Enterprise NAT/Firewalls

  D. Assigning unique VRF ID's to each L3VPN

  Correct Answer: A

• Question 98:

  Company XYZ is in the process of identifying which transport mechanism(s) to use as their WAN technology. Their main two requirements are:

  1.

  a technology that could offer DPI, SLA, secure tunnels, privacy, QoS, scalability, reliability, and ease of management

  2.

  a technology that is cost-effective

  Which WAN technology(ies) should be included in the design of company XYZ?

  A. Software-defined WAN should be the preferred choice because it complements both technologies, covers all the required features, and it is the most cost-effective solution.

  B. Internet should be the preferred option because it is cost effective and supports BFD, IP SLA. and IPsec for secure transport over the public Internet.

  C. Both technologies should be used. Each should be used to back up the other one; where the primary links are MPLS, the internet should be used as a backup link with IPsec (and vice versa).

  D. MPLS meets all these requirements and it is more reliable than using the Internet. It is widely used with defined best practices and an industry standard.

  Correct Answer: A

• Question 99:

  Which two features are advantages of SD-WAN compared to MPLS-based connectivity? (Choose two.)

  A. uses FEC constructs for traffic forwarding, thereby improving efficiency

  B. separates infrastructure and policy

  C. uses policy-based forwarding of real-time traffic with less complexity

  D. unifies the WAN backbone

  E. manages failures through backup links

  Correct Answer: BD

  A) No. That's not specific to SD-WAN

  B) Yes. Separate data plane and control plane

  C) No. Real-time traffic is focus on latency and QoS.

  D) Yes. Exactly stated "SD-WAN unifies the WAN backbone" in below site:

  https://www.kyndryl.com/in/en/learn/sd-wan

  E) No. MPLS also can do that.

• Question 100:

  As network designer, which option is your main concern with regards to virtualizing multiple network zones into a single hardware device?

  A. Fate sharing

  B. CPU resource allocation

  C. Congestion control

  D. Security

  E. Bandwidth allocation

  Correct Answer: A