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2021 Apr 300-320 training

Q121. 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 


Q122. Which protocol should be configured if a network administrator has the following requirements? 

. Multiple physical gateways participating simultaneously in packet forwarding. 

. All hosts in the VLAN configured with the same default gateway address. 

A. HSRP 

B. VRRP 

C. VTP 

D. GLBP 

Answer: D 


Q123. Which three options are features of IP SLAs? (Choose three.) 

A. enables verification of service guarantees 

B. dynamically adjusts QoS parameters 

C. validates network performance and metrics 

D. initiates failover for saturated links 

E. proactively identifies network related issues 

Answer: A,C,E 


Q124. A network designer wants to improve security at the edge of the network and allow routing protocols to communicate without any additional configuration. What firewall mode meets the design requirements? 

A. routed 

B. zoned 

C. context 

D. transparent 

Answer: D 


Q125. What is an advantage of using the Cisco FabricPath feature in a data center environment? 

A. VSS does not have to be configured. 

B. Transparent Interconnection of Lots of Links can be configured simultaneously. 

C. Equal-Cost Multipath can be used to choose the forwarding path. 

D. The control plane and management plane remain separate. 

Answer: C 


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Q126. Which protocol should be configured if a network administrator wants to configure multiple 

physical gateways to participate simultaneously in packet forwarding? 

A. HSRP 

B. VRRP 

C. GLBP 

D. VTP 

Answer: C 


Q127. What is one reason to implement Control Plane Policing? 

A. allow OSPF routing protocol to advertise routes 

B. protect the network device route processor from getting overloaded by rate limiting the incoming control plane packets 

C. allow network devices to generate and receive packets 

D. protect the data plane packets 

Answer: B 


Q128. When is a first-hop redundancy protocol needed in the distribution layer? 

A. when the design implements Layer 2 between the access and distribution blocks 

B. when multiple vendor devices need to be supported 

C. when preempt tuning of the default gateway is needed 

D. when a robust method of backing up the default gateway is needed 

E. when the design implements Layer 2 between the access switch and the distribution blocks 

Answer: A 


Q129. NBAR is deployed on the network as part of network optimization. Which technology is critical to recognize new applications on the network? 

A. PDLM 

B. ACLs 

C. code upgrade 

D. additional licenses 

Answer: A 


Q130. Click the Exhibit button. 

Refer to the exhibit. Which Layer 2 feature detects a link failure between the switch and router B that decreases OSPF reconvergence to approximately 50 milliseconds? 

A. BFD 

B. UDLD 

C. RSTP 

D. PVST+ 

Answer: A