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2021 Mar 300-320 brain dumps

Q111. Which four Cisco proprietary Spanning Tree Protocol enhancements are supported with rapid per-VLAN Spanning-Tree plus? (Choose four.) 

A. PortFast 

B. UplinkFast 

C. loop guard 

D. root guard 

E. BPDU guard 

F. BackboneFast 

Answer: A,C,D,E 


Q112. Which option is an.advantage of using PIM sparse mode instead of PIM dense mode? 

A. No RP is required. 

B. There is reduced congestion in the network. 

C. IGMP is not required. 

D. It floods all multicast traffic throughout the network. 

Answer: B 


Q113. 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 


Q114. Which option is an advanced WAN services design consideration for a multipoint architecture that connects two or more customer devices using Ethernet bridging techniques over an MPLS network? 

A. VPLS 

B. Metro Ethernet 

C. MPLS 

D. SONET/SDH 

Answer: A 


Q115. With respect to address summarization, which of the following statements concerning IPv4 and IPv6 is true? 

A. The potential size of the IPv6 address blocks suggests that address summarization favors IPv6 over IPv4. 

B. Role based addressing using wildcard masks to match multiple subnets is suitable for IPv4, but unsuitable for IPv6. 

C. In order to summarize, the number of subnets in the IPv4 address block should be a power of 2 while the number of subnets in the IPv6 address block should be a power of 64. 

D. WAN link addressing best supports summarization with a /126 subnet for IPv4 and a /31 for IPv6. 

Answer: B 


Refresh 300-320 actual exam:

Q116. Which two VPN solutions extend the routing capabilities of basic IPsec VPNs? (Choose two.) 

A. GRE 

B. NVI 

C. DES 

D. VTI 

E. AES 

Answer: A,D 


Q117. Which two benefits are achieved if a network is designed properly with a structured addressing scheme? (Choose two.) 

A. efficient ACLs 

B. improved redundancy 

C. hardened security 

D. easier troubleshooting 

E. added resiliency 

Answer: A,D 


Q118. Which technology can block interfaces and provide a loop-free topology? 

A. STP 

B. VSS 

C. VLAN 

D. vPC 

Answer: D 


Q119. A network design team is experiencing sustained congestion on access and distribution uplinks. QoS has already been implemented and optimized, and it is no longer effective in ensuring optimal network performance. 

Which two actions can improve network performance? (Choose two.) 

A. Reconfigure QoS based on the IntServ model. 

B. Configure selective packet discard to drop noncritical network traffic. 

C. Implement higher-speed uplink interfaces. 

D. Bundle additional uplinks into logical EtherChannels. 

E. Utilize random early detection to manage queues. 

Answer: C,D 


Q120. A company requires real-time SAN replication between two remote locations. What is the standard path selection protocol for fabric routing? 

A. FSPF 

B. FICON 

C. FCOE 

D. SCSI 

Answer: A