300-320 | The Abreast of the times Guide To 300-320 dumps

Q15. Which protocol is used in an in-band network and why?

A. UDP, because it is connectionless

B. SSH, because the username and password are encrypted

C. Telnet, because the username and password are sent in clear

D. MSDP, because it uses TCP as its transport protocol

Answer: B

Q16. Which two of these are correct regarding the recommended practice for distribution layer design? (Choose two.)

A. use a redundant link to the core

B. use a Layer 2 link between distribution switches

C. never use a redundant link to the core because of convergence issues

D. use a Layer 3 link between distribution switches with route summarization

E. use a Layer 3 link between distribution switches without route summarization

Answer: A,E

Explanation:

We need to summarize from distribution to core but not between distribution switches

Q17. Which route summarization most efficiently reduces perceived network complexity that is composed of

subnetworks ranging from 172.16.20.0/24 to 172.16.36.0/24?

A. 172.16.8.0/21

B. 172.16.8.0/19

C. 172.16.20.0/20

D. 172.16.0.0/18

E. 172.16.20.0/19

Answer: D

Q18. Which Nexus feature enables you to support server connectivity with one topology and address requirement for both high availability and high bandwidth?

A. vPC

B. vPC+

C. Stackwise

D. EvPC

Answer: D

Explanation:

https://www.cisco.com/en/US/docs/switches/datacenter/nexus5000/sw/mkt_ops_guides/51 3_n1_1/

n5k_enhanced_vpc.html#wp1159705

"Enhanced vPC enables you to support server connectivity with one topology and address requirement for both high availability and high bandwidth."

Q19. From a design perspective which two of the following OSPF statements are most relevant? (Choose two)

A. OSPF stub areas can be thought of as a simple form of summarization

B. OSPF cannot filter intra-area routes

C. An ABR can only exist in two areas - the backbone and one adjacent area

D. Performance issues in the Backbone area can be offset by allowing some traffic to transit a non-backbone area

E. The size of an area (the LSDB) will be constrained by the size of the IP MTU

Answer: A,B

Q20. What is the primary benefit of implementing Virtual Device Contexts on Nexus hardware In a multi- tenant environment?

A. resource isolation

B. software partitioning

C. resource allocation

D. granular monitoring

Answer: A

Q21. What WAN feature can prioritize real-time, IP-based applications when circuits may be saturated?

A. FRTS

B. LLQ

C. CBWFQ

D. WFQ

Answer: B

Q22. Which three major points are important for network virtualization to separate logical networks on a shared

physical infrastructure? (Choose three.)

A. VLANs

B. data plane

C. control plane

D. VPNs

E. VSANs

F. management plane

Answer: B,C,F

Q23. The direction of the flow of multicast traffic is based on which protocol?

A. PIM

B. IGMP

C. underlying IGP

D. MSDP

Answer: C

Explanation: https://www.cisco.com/c/en/us/td/docs/ios/solutions_docs/ip_multicast/White_papers/mcst_ ovr.html

"Reverse Path Forwarding (RPF) PIM uses the unicast routing information to create a distribution tree along the reverse path from the receivers towards the source. The multicast routers then forward packets along the distribution tree from the source to the receivers. RPF is a key concept in multicast forwarding. It enables routers to correctly forward multicast traffic down the distribution tree. RPF makes use of the existing unicast routing table to determine the upstream and downstream neighbors. A router will forward a multicast packet only if it is received on the upstream interface. This RPF check helps to guarantee that the distribution tree will be loopfree."

Q24. In a collapsed core design, which three benefits are provided by a second-generation Cisco MDS director? (Choose three.)

A. a higher fan-out ratio

B. fully redundant switches

C. 100 percent port efficiency

D. all ISLs contained within a single chassis

E. higher latency and throughput than a core-edge design switch

Answer: B,C,D