[Aug-2022] 4A0-C02 Pre-Exam Practice Tests Exam Questions and Answers for Nokia SRC Certification Study Guide [Q252-Q272] : Top Exam Collection : http://blog.topexamcollection.com

Q252. 点击展品。

An update travels from AS 135000 to AS 137000, traversing both 32-bit and 16-bit AS paths.
What will the AS Path be when the update reaches AS 137000?

140000 200 135000

137000 140000 200 135000

140000 23456 135000

135000 200 140000

Q253. Which of the following is a true statement?

The lower the age-time, the greater the amount of flooding

The higher the age-time, the greater the amount of flooding.

The lower the age-time, the lower the amount of flooding.

There is no relationship between the age-time and the amount of flooding.

Q254. 点击展品。

For the extranet VPRN and community lists shown, which of the following communities will be included in the export policy applied to VPRN 20 on router R2?

“Blue-Only”

“Blue-Only” and “Blue-Green”

“Green-Only”

“Extranet-VPN-Green”

“Blue-Green”

Q255. Given the following configuration for router R1, what is the expected Next Hop for prefix 192.168.1.0/27 as seen on router R2?

10.0.2.1

10.0.2.2

10.16.10.1

10.16.10.3

Q256. 点击展品。

A Carrier Supporting Carrier (CSC) VPRN is configured for a customer carrier who is a BGP/MPLS service provider. Which route is present in PE1’s global routing table?

192.168.10.1

192.168.20.1

10.10.10.1

10.10.10.6

Q257. In a Carrier Supporting Carrier (CSC) VPRN, which of the following is a benefit to the network provider?

No need to build and maintain its own backbone.

The solution scales as the number of serviced customer carriers increases.

The solution scales as the number of VPNs offered by the customer carriers increases.

The ability to manage end-customer services.

Q258. Router R2 receives a route to 192.168.1.0/27 from router R4, and sets the local preference to 110. Router R1 receives a route to 192.168.1.0/27 from router R3, and sets the local preference to 80. Both ASs have a full iBGP mesh. What path does traffic destined to 192.168.1.0/27 take from router R1?

R1-R3-R8

R1-R2-R4-R8

R1-R3-R4-R8

R1-R2-R4-R3-R8

Q259. The IP ToS field consists of ________ bits, of which ________are used. The _________most significant (first) bits define precedence.

8, 6, 3

8, 8, 6

16, 8, 4

8, 6, 4

24, 16, 8

Q260. If traffic is destined to queue 5, which has a high-priority-only value of 0 in the network-queue policy, all out-of-profile packets will be dropped.

真

假

Q261. Assuming that none of the routers within AS 65200 is configured with next-hop-self”, what will the BGP update for the 192.168.0.1/27 prefix contain when it arrives at router B?

AS Path of 65200 65100, Next Hop of router A

AS Path of 65200 65100, Next Hop of router E

AS Path of 65100, Next Hop of router E

AS Path of 65100, Next Hop of router A

Q262. Given the following output what is the most likely reason the SDP binding is operationally down? (Choose 2)

The sdp id is different on the far-end.

LDP is disabled on the far-end.

The vc-id is different on the far-end.

The mesh-sdp is missing on the far-end.

The mesh-sdp is administratively shutdown on PEL

There is an MTU mismatch.

Q263. Router R1 is a route reflector with clients R2, R5 and R6. Prefixes advertised by router R5 have a local preference of 200. Router R3 advertises the prefix 192.168.1.0/27 to routers R5 and R6.
Assuming that none of the routers in AS 65540 is configured with “advertise-external”, what is the expected output of “show router bgp routes on router R1?

方案 A

方案 B

选项 C

选项 D

Q264. The AS-path nullification method is used to prevent CE2 from discarding routes received from CE1. On which router should the AS-path nullification policy be configured?

CE1

PE2

PE1

CE2

Q265. What happens to the MAC entries in the VPLS FDB when “disable-aging” is executed at the VPLS levels

The individual SAPs and SDPs will age out MAC addresses for this VPLS.

Aging will be disabled for locally-learned MAC addresses for this VPLS.

Aging will be disabled for both local and remote MAC addresses for this VPLS.

Aging will be disabled for remote MAC addresses for this VPLS.

Q266. Click on the exhibit below.

Given the following output what is the most likely reason the SDP binding is operationally down? (Choose 2)

The sdp id is different on the far-end.

LDP is disabled on the far-end.

The vc-id is different on the far-end.

The mesh-sdp is missing on the far-end.

The mesh-sdp is administratively shutdown on PEL

There is an MTU mismatch.

Q267. If a packet is marked on a SAP-ingress, it will be remarked at the first network egress point (if remarking is enabled in the network egress policy).

真

假

Q268. What action will be taken when an MPLS router receives a frame with a label that does not exist in the LFIB?

The frame will be flooded.

The frame will be discarded.

The frame will be fragmented.

Q269. A router receives two routes from its neighbors: a route from OSPF for 10.0.0.0/24, and a route from BGP for 10.0.0.0/8. Both routes have reachable next hops. Which of the following is TRUE?

Only the BGP route is in the route table.

Both routes are in the route table.

None of the routes is in the route table.

Only the OSPF route is in the route table.

Q270. For a Carrier Supporting Carrier (CSC) VPRN where the customer carrier is an ISP that provides Internet connectivity to its end-customers, which of the following is FALSE?

Customer carrier PE routers residing in different sites must run iBGP between them to exchange customers’ routes.

MPLS can be used in the customer carrier network to improve scalability.

The customer carrier network can be a pure IP network.

A CSC VPRN is configured on the CSC-CE to forward data packets to the network provider.

Q271. In the context of hierarchical scheduling, a scheduler is configured with a CIR weight of 0. Which of the following statements is TRUE?

The scheduler will be allocated its “within CIR” bandwidth before all other children at the same level have received their “within CIR” bandwidth.

The scheduler will be allocated its “within CIR” bandwidth after all other children at the same level have received their “within CIR” bandwidth.

The scheduler will be allocated its “within CIR” bandwidth after all other children at all levels have received their “within CIR” bandwidth.

The scheduler will not be allocated its “within CIR” bandwidth.

Q272. Which of the following are true when ports are configured with the IEEE 802.3ah Loopback Control feature? (Choose 3)

The loopback control PDU instructs the remote port to enter loopback mode.

Putting a port in loopback does not affect customer data flow

Both ports must rediscover the OAM capabilities of each other once the port is put back into service.

Both ports must still send Information PDUs to avoid going back to discovery mode.

When a port is in loopback mode, service mirroring will still work if it is a mirror-source or mirror-destination.

All packets, except for information PDUs, are looped back.

[2022年8月] 诺基亚SRC认证学习指南4A0-C02考前模拟试题及答案 [Q252-Q272]

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