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Question No: 13
Which ISP technology can be implemented as a service when designing a topology to perform extranet
connectivity via multitenant segmentation from within a corporate intranet?
A. Cisco Easy VPN
B. GRE over IPsec
C. MPLS
D. VTI
E. VPNaaS
Answer: C
Question No: 14
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."
Question No: 15
Which two physical components can enable high availability on a Cisco 6500 device? (Choose two.)
A. dual supervisor modules
B. bundled Ethernet Interconnects
C. line modules with DFCs
D. redundant power supplies
E. VSS interlink cables
Answer: A,D
Question No: 16
What is the physical topology of ACI?
A. leaf & spine
B. point to point
C. hub & spoke
D. spoke to spoke
Answer: A
Question No: 17
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
Answer: A
Question No: 18
A network designer needs to explain the advantages of route summarization to a client. Which two options are advantages that should be included in the explanation? (Choose Two)
A. Increases security by advertising fake networks.
B. Reduces routing table size.
C. Advertises detailed routing size
D. Utilizes the routers full CPU capacity.
E. Reduces the upstream impact of a flapping interface.
Answer: B,E
Question No: 19
Which Cisco NAC Appliance design is the most scalable in large Layer 2-to-distribution implementation?
A. Layer 2 out-of-band
B. Layer 2 in-band
C. Layer 3 out-of-band
D. Layer 3 in-band
Answer: B
Explanation: https://www.safaribooksonline.com/library/view/foundation-learning- guide/9780132652933/ch08.html
"Layer 2 In-Band Designs The Layer 2 in-band topology is the most common deployment option.
[...]
This is the most scalable design in large L2-to-distribution environments, because this design can be
transparently implemented in the existing network supporting multiple access layer switches. It supports all network infrastructure equipment. The Cisco NAS supports per- user ACLs."
Question No: 20
Which VRF component ensures control plane separation between the different Layer 3 VPNs?
A. FIB
B. routing protocol instance
C. RIB
D. a subset of the router interfaces
Answer: B
Question No: 21
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
Question No: 22
Which two features provide resiliency in a data center? (Choose two.)
A. Cisco FabricPath
B. VTP
C. encryption
D. vPC
E. VRF
Answer: A,D
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