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New Cisco 300-320 Exam Dumps Collection (Question 5 - Question 14)

Q5. What are the two methods of ensuring that the RPF check passes? (Choose two.)

A. implementing static mroutes

B. implementing OSPF routing protocol

C. implementing MBGP

D. disabling the interface of the router back to the multicast source

E. disabling BGP routing protocol

Answer: A,C


Q6. Which statement about data center access layer design modes is correct?

A. The access layer is the first oversubscription point in a data center design.

B. The data center access layer provides the physical-level connections to the server resources and only operates at Layer 3.

C. When using a Layer 2 looped design, VLANs are not extended into the aggregation layer.

D. When using a Layer 3 design, stateful services requiring Layer 2 connectivity are provisioned from the aggregation layer.

Answer: A


Q7. Which of these is a recommended practice with trunks?

A. use ISL encapsulation

B. use 802.1q encapsulation

C. set ISL to desirable and auto with encapsulation negotiate to support ISL protocol negotiation

D. use VTP server mode to support dynamic propagation of VLAN information across the network

Answer: B


Q8. What should be implemented to prevent exceeding the 50mb allowable bandwidth of internet circuit?

A. policing

B. shaping

C. CIR

D. rate-limit

Answer: B


Q9. Which unique EIGRP feature allows for faster Layer 3 convergence?

A. fast EIGRP timers

B. feasible successors

C. hybrid routing protocol

D. Cisco proprietary protocol

Answer: B


Q10. Which OSPF concept is used to relate areas to the backbone area through another area?

A. Virtual Links

B. Backup Links

C. Inter-backbone Links

D. Point-to-point Links

Answer: A


Q11. A company wants to configure BGP on a router so that other BGP neighbors cannot influence the path of a particular route .which action must be taken to accomplish this configuration ?

A. Configure a low router ID for the route

B. Configure a high local preference for the route

C. Configure a high weight for the route

D. Configure a low MED for the route

Answer: B


Q12. HSRP has been implemented on distribution switches but no priority has been defined. Which one of the two switches will be active ?

A. The one with the higher IP address configured on the interface

B. The one with the higher MAC address configured on the interface

C. The one which booted the last

D. The one with the higher bandwith configured on the interface

Answer: A


Q13. Which two elements comprise the backbone area while designing a new network utilizing IS-IS as the interior gateway protocol (choose two)

A. contiguous chain of Level 2 capable routers

B. contiguous chain of Level1/Level 2 capable routers

C. set of Level 2 configured interfaces

D. contiguous Level 1 capable routers

E. set of Level 1 configured interfaces

Answer: A,B

Explanation:

https://www.cisco.com/en/US/products/ps6599/products_white_paper09186a00800a3e6f.s html

"Backbone IS-IS does not have a backbone area like the OSPF area 0. The IS-IS backbone is a contiguous collection of Level 2-capable routers, each of which can be in a different area"

http://www.ciscopress.com/articles/article.asp?p=26850&seqNum=3

"In most designs with routing hierarchy, the Level 2 routers are also Level 1 routers by virtue of their

identification with a certain area. Therefore, in IS-IS, a router can function as Level 1-only or Level 2-only and possibly as both Level 1 and Level 2 (Level 1-2). Level 1-2 routers act as border routers to their respective areas, providing connectivity to other areas. The Level 2 backbone is essentially a virtual IS-IS area consisting of routers engaged in Level 2 routing"


Q14. 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."


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