Cisco CCDE 400-007 Questions & Answers

• Question 161:

  You have been tasked with designing a data center interconnect as part of business continuity You want to use FCoE over this DCI to support synchronous replication. Which two technologies allow for FCoE via lossless Ethernet or data center bridging? (Choose two.)

  A. DWDM

  B. EoMPLS

  C. SONET/SDH

  D. Multichassis EtherChannel over Pseudowire

  E. VPLS

  Correct Answer: AC

• Question 162:

  Which SDN architecture component is used by the application layer to communicate with the control plane layer to provide instructions about the resources required by applications?

  A. southbound APIs

  B. northbound APIs

  C. orchestration layer

  D. SDN controller

  Correct Answer: B

• Question 163:

  A European national bank considers migrating its on-premises systems to a private cloud offering in a non-European location to significantly reduce IT costs. What is a primary factor prior to migration?

  A. data governance

  B. additional latency

  C. security

  D. cloud connectivity

  Correct Answer: A

  Refer vn mentioned below, political issue is the highest priority and mandatory.

  When considering moving out the data, you need to consider the place allowed, rather than how to move or store. Even you have a very high security to protect data, if the government don't allowed you to place in the desired country, then

  you still cannot do that.

• Question 164:

  You were tasked to enhance the security of a network with these characteristics:

  A pool of servers is accessed by numerous data centers and remote sites The servers are accessed via a cluster of firewalls The firewalls are configured properly and are not dropping traffic The firewalls occasionally cause asymmetric routing of traffic within the server data center.

  Which technology should you recommend to enhance security by limiting traffic that could originate from a hacker compromising a workstation and redirecting flows at the servers?

  A. Poison certain subnets by adding static routes to Null0 on the core switches connected to the pool of servers.

  B. Deploy uRPF strict mode.

  C. Limit sources of traffic that exit the server-facing interface of the firewall cluster with ACLs.

  D. Deploy uRPF loose mode

  Correct Answer: C

• Question 165:

  You are using iSCSI to transfer files between a 10 Gigabit Ethernet storage system and a 1 Gigabit Ethernet server The performance is only approximately 700 Mbps and output drops are occurring on the server switch port. Which action will improve performance in a cost- effective manner?

  A. Change the protocol to CIFS.

  B. Increase the queue to at least 1 GB

  C. Use a WRED random drop policy

  D. Enable the TCP Nagle algorithm on the receiver

  Correct Answer: A

• Question 166:

  An engineer is designing the QoS strategy for Company XYZ. Based on initial analysis, a lot of scavenger type of traffic is traversing the network's 20Mb Internet link toward the service provider. The new design must use a QoS technique that limits scavenger traffic to 2 Mbps, which helps avoid oversubscription of the link during times of congestion. Which QoS technique can be used to facilitate this requirement?

  A. class-based traffic policing

  B. LLQ

  C. CBWFQ

  D. class-based traffic shaping

  Correct Answer: C

  limit scavenger traffic during times of congestion

• Question 167:

  A company uses equipment from multiple vendors in a data center fabric to deliver SDN, enable maximum flexibility, and provide the best return on investment. Which YANG data model should be adopted for comprehensive features to simplify and streamline automation for the SDN fabric?

  A. proprietary

  B. OpenConfig

  C. native

  D. IETF

  Correct Answer: B

• Question 168:

  How must the queue sizes be designed to ensure that an application functions correctly?

  A. Each individual device queuing delay in the chain must be less than or equal to the application required delay.

  B. The queuing delay on every device in the chain must be exactly the same to the application required delay.

  C. The default queue sizes are good for any deployment as it compensates the serialization delay.

  D. The sum of the queuing delay of all devices plus serialization delay in the chain must be less than or equal to the application required delay.

  Correct Answer: D

• Question 169:

  The controller has a global view of the network, and it can easily ensure that the network is in a consistent and optimal configuration. Which two statements describe a centralized SDN control path? (Choose two.)

  A. It significantly improves the latency when performing reactive handling of PACKET_IN events

  B. Integrating smart NIC capabilities on the local host level is made easier through rest APIs

  C. A centralized controller can support all southbound APIs, which allows for easy integration with legacy equipment

  D. It is highly-available by design with no single-point-of-failure risks present

  E. Scaling of the centralized controller cluster is challenging for services like DHCP and load-balancing

  Correct Answer: CE

  http://blog.gampel.net/2015/08/centralized-vs-distributed-sdn-control.html

• Question 170:

  An architect receives a business requirement from a CTO that states the RTO and RPO for a new system should be as close as possible to zero. Which replication method and data center technology should be used?

  A. asynchronous replication over dual data centers via DWDM

  B. synchronous replication over geographically dispersed dual data centers via MPLS

  C. synchronous replication over dual data centers via Metro Ethernet

  D. asynchronous replication over geographically dispersed dual data centers via CWDM

  Correct Answer: C

  Metro Ethernet is a high-speed, low-latency network technology that enables synchronous replication between data centers that are relatively close geographically, minimising the impact of latency on system performance and helping to maintain a low RTO.