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Q10. A network Engineer is designing a hierarchical design and needs to optimize WAN design.
On what group of devices can a network engineer summaries routes to remote WAN sites?
A. Core
B. Distribution
C. Data Center Distribution WAN Edge
D. WAN Edge
E. Campus access distribution layer
Answer: B
Explanation: Summarize at Service Distribution. It is important to force summarization at the distribution towards WAN Edge and towards campus & data center
Q11. A company has hired an entry-level network administrator for its new data center. The company CIO wants to give the administrator limited access on the newly configured Cisco Nexus 7000. Which feature should be used to allow limited access?
A. NAC
B. VDC
C. RBAC
D. vPC
Answer: C
Q12. A designer should have which three technologies in the network before configuring MPLS Layer 3 VPNs? (Choose three.)
A. MPLS
B. LDP
C. Cisco Express Forwarding
D. VSS
E. vPC
F. VRRP
Answer: A,B,C
Q13. What is the most important consideration when selecting a VPN termination device?
A. CPU cycles per second
B. VPN sessions per interface
C. Packets per second
D. Bits per second
Answer: C
Q14. ASA firewall cause outage....maintaining QOS in architecture ......(or)Cisco ASA in active
/active mode, how to pass almost like stateful info across to the other member?
A. ECMP
B. BFD
C. IP SLA
D. ASR groups
Answer: D
Explanation:
ASR = Asymmetric routing
Q15. Which two ways to support secure transport of multicast traffic are true? (Choose two.)
A. Use spoke-to-spoke design.
B. Use IPsec over GRE tunnel.
C. Use GET VPN.
D. Use NBMA instead of broadcast.
E. Disable encryption for multicast traffic.
Answer: B,C
Explanation:
GET VPN = Group Encrypted Transport VPN. It is tunnel-less and can support multicast traffic
Q16. 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
Q17. In which OSI layer does IS-IS operate?
A. Layer 1
B. Layer 2
C. Layer 3
D. Layer 4
Answer: B
Explanation:
Yeah, it can advertise layer 3 IPv4 & v6 routes but it operates at L2. (that's why Fabricpath is based on IS-IS)
Q18. An engineer is attempting to improve OSPF network performance and discovers that the entire SPT
recomputes whenever a type 1 or type 2 LSA is received within an area. Which action can optimize SPT operations?
A. Tune LSA throttling thresholds.
B. Enable incremental SPF.
C. Configure totally stubby areas throughout the domain.
D. Summarize networks on all ABRs.
Answer: B
Explanation:
https://www.cisco.com/c/en/us/td/docs/ios/12_0s/feature/guide/ospfispf.html#wp1027184
"Benefits of OSPF Incremental SPF OSPF uses Dijkstra's SPF algorithm to compute the shortest path tree (SPT). During the computation of the SPT, the shortest path to each
node is discovered. The topology tree is used to populate the routing table with routes to IP networks. When changes to a Type-1 or Type-2 link-state advertisement (LSA) occur in an area, the entire SPT is recomputed. In many cases, the entire SPT need not be recomputed because most of the tree remains unchanged. Incremental SPF allows the system to recompute only theaffected part of the tree. Recomputing only a portion of the tree rather than the entire tree results in faster OSPF convergence and saves CPU resources. Note that if the change to a Type-1 or Type-2 LSA occurs in the calculating router itself, then the full SPT is performed.
Incremental SPF is scheduled in the same way as the full SPF. Routers enabled with incremental SPF and routers not enabled with incremental SPF can function in the same internetwork."
Q19. When 2 distribution switches are configured for VSS, what needs to be done to extend back plane connectivity? (E)
A. ISL
B. VSL
C. VSS
Answer: B
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