300-320 Exam
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New Cisco 300-320 Exam Dumps Collection (Question 15 - Question 24)
Q15. Which VPN connectivity representing both Hub-and-Spokes and Spokes-to-Spokes?
A. DMVPN
B. IPSec VPN
C. VPN Router
D. VPN hub
Answer: A
Q16. In what situation must spanning-tree be implemented?
A. when first hop redundancy protocol exists with redundant Layer 2 links between distribution switches
B. when a VLAN spans access layer switches to support business applications
C. when trunks need to extend multiple VLANs across access switches
D. when it is necessary to speed up network convergence in case of link failure
Answer: A
Explanation:
STP (L2 loop prevention mechanism) should be implemented in topologies where possible loops may occur and redundant L2 links between distribution switches is a very good example as long as the links are not channelled (PC, vPC, MEC).
Q17. Which action can be taken on a multiaccess segment with OSPF speakers to reduce the performance impact during widespread convergence events?
A. Separate the network into multiple areas for each new multiaccess segment.
B. Enable LSA throttling in the core to slow link state advertisement updates during times of network instability.
C. Ensure that the elected DR or BDR router can support high-volume convergence events.
D. Verify that fewer than 50 OSPF speakers are on the segment.
Answer: B
Explanation:
http://blog.ine.com/2010/06/02/ospf-fast-convergenc/
"It is worth noting that three most important timers to tune network for sub-second convergence are the failure detection delay, initial LSA generation delay and initial SPF delay. All other timers, such as hold and maximum time serve the purpose of stabilizing network, and affect convergence in u201cworst-caseu201d unstable network scenarios."
More info on LSA throttling: https://www.cisco.com/c/en/us/td/docs/ios/12_0s/feature/guide/fsolsath.html
"Benefits of OSPF LSA Throttling Prior to the OSPF LSA Throttling feature, LSA generation was rate-limited for 5 seconds. That meant that changes in an LSA could not be propagated in milliseconds, so the OSPF network could not achieve millisecond convergence. The OSPF LSA Throttling feature is enabled by default and allows faster OSPF convergence (in milliseconds). This feature can be customized. One command controls the generation (sending) of LSAs and another command controls the receiving interval. This feature also provides a dynamic mechanism to slow down the frequency of LSA updates in OSPF during times of network instability."
Q18. Which statement about the ToR design model is true?
A. It can shorten cable runs and simplify rack connectivity.
B. Each ToR switch must be individually managed.
C. Multiple ToR switches can be interconnected to provide a loop-free spanning-tree infrastructure.
D. It can connect servers that are located in separate racks.
Answer: A
Q19. A company has 30 sites and wants allow dynamic IGP protocol, multicast and non IP traffic between sites. Which topology should the company implement?
A. dmvpn spoke-to-spoke
B. dmvpn hub-to-spoke
C. vti
D. p2p gre
Answer: A
Q20. Which statement best describes Cisco OTV internal interfaces?
A. They are Layer 2 interfaces that are configured as either access or trunk interfaces on the switch.
B. They are interfaces that perform Layer 3 forwarding with aggregation switches.
C. They are the interfaces that connect to the ISP.
D. They are tunnel interfaces that are configured with GRE encapsulation.
Answer: A
Explanation: https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Data_Center/DCI/whitepaper/D CI3_OTV_Intro/DCI_1.html
"Internal Interfaces To perform OTV functionality, the edge device must receive the Layer 2 traffic for all VLANs that need to be extended to remote locations. The Layer 2 interfaces, where the Layer 2 traffic is usually received, are named internal interfaces"
Q21. Which of these statements is correct regarding Stateful Switchover and Cisco Nonstop Forwarding?
A. Utilizing Cisco NSF in Layer 2 environments can reduce outages to one to three seconds
B. Utilizing SSO in Layer 3 environments can reduce outages to one to three seconds.
C. Distribution switches are single points of failure causing outages for the end devices.
D. Utilizing Cisco NSF and SSO in a Layer 2 environment can reduce outages to less than one second.
E. NSF and SSO with redundant supervisors have the most impact on outages at the access layer.
Answer: E
Q22. SDN solution for WAN which is support automation, PnP (Plug and Play) application delivers on WAN..
A. APIC
B. APIC-EM
C. Enterprise NFV
D. WAAS
E. ACI
Answer: B
Q23. Which technology provides easier encryption management?
A. GETVPN
B. DMVPN
C. IPsec
D. EasyVPN
E. GRE
Answer: A
Q24. A VPN solution requires bulk traffic encryption, low OpEx to add new sites, and the ability to accommodate dynamic tunnels between branch locations. What VPN solution can fulfill these requirements?
A. GETVPN
B. SSL VPN
C. Easy VPN
D. DMVPN
Answer: D
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