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  H3C认证GB0-283English考试题库介绍

  考试代号: GB0-283English
  问题数量:300 Q&As
  
  更新时间: 2009-08-06
  注册地点: Prometric/Pearson VUE
  题库全称:Constructing Enterprise-level Routing Networks

  免费GB0-283English题库Demo赏析

  　
  　
  Exam : HuaWei GB0-283English
  Title : Constructing Enterprise-level Routing Networks

  1. Which of the following descriptions about QoS at the access, convergence and core layers is/are correct? ( )
  A. QoS is implemented identically in the access, convergence and core layers.
  B. Packets are classified and marked in the access layer.
  C. No QoS mechanism should be configured in the access layer.
  D. Usually, the queuing mechanism (such as CBQ) and the congestion avoidance mechanism (such as WRED) should be used in the convergence layer.
  Answer: BD

  2. As shown in the figure, Area 1 is an NSSA area and RouterD is the ABR of the area. The configuration on RouterD is as follows:
  ospf 1
  area 0.0.0.1
  network 10.45.0.0 0.0.0.255
  nssa default-route-advertise
  #
  area 0.0.0.0
  network 4.4.4.4 0.0.0.0
  network 10.34.0.0 0.0.0.255
  Which of the following descriptions about the above network diagram and configuration is correct? ( )
  A. RouterD redistributes a Type 7 LSA for a default route in Area 1. RouterE and RouterF can receive this LSA.
  B. RouterD redistributes a Type 5 LSA for a default route in Area 1. RouterE and RouterF can receive this LSA.
  C. RouterC can receive a Type 5 LSA for a default route redistributed by RouterD.
  D. None of the above
  Answer: A

  3. The BGP mandatory attributes include ( ).
  A. Origin
  B. AS-Path
  C. Next-hop
  D. MED
  E. Local-preference
  F. Community
  Answer: ABC

  4. Compared with IPv4, the IPv6 address is extended to ( ).
  A. 128 bits
  B. 164 bits
  C. 64 bits
  D. 256 bits
  Answer: A

  5. What is the meaning of the BGP command aggregate 10.110.0.0 255.255.0.0 suppress-policy test ? ( )
  A. Advertise the aggregation route only
  B. Advertise the aggregation route and all the aggregated routes
  C. Advertise the aggregation route and some aggregated routes that meet the filtering conditions
  D. Advertise the aggregated routes only,
  Answer: C

  6. The ASBR imports four external routes, 192.168.0.0/24, 192.168.1.0/24, 192.168.2.0/24 and 192.168.0/24. These routes are aggregated to one route 192.168.0.0/22 by the ABR. Which routes will the ABR redistribute to the other areas? ( )
  A. One aggregation route
  B. The four original routes
  C. One aggregation route and the four original routes
  D. None
  Answer: B

  7. The multicast address used by OSPF is ( ).
  A. 224.0.0.5
  B. 224.0.0.6
  C. 224.0.0.9
  D. 224.0.0.10
  Answer: AB

  8. Which of the following descriptions about OSPF STUB area is wrong? ( )
  A. A backbone area cannot be configured as STUB area and a virtual link cannot pass through a STUB area.
  B. It is unnecessary to configure this attribute on all routers in a STUB area.
  C. There is no ASBR in a STUB area.
  D. After an area is configured as STUB area, the Type 3 LSA of other areas can be propagated in this area.
  Answer: B

  9. OSPF is based on the ( ) algorithm.
  A. DV
  B. SPF
  C. HASH
  D. 3DES
  Answer: B

  10. Which of the following descriptions about route aggregation in OSPF is/are wrong? ( )
  A. The ABR can automatically summarize routes without manual configuration.
  B. Aggregation can be made only on the ABR.
  C. The router serving as the ABR and the ASBR concurrently cannot summarize routes.
  D. The ASBR can summarize all external routes.
  Answer: ABCD

  11. Which of the following descriptions about route import is/are correct? ( )
  A. A routing protocol can import the routes discovered by other routing protocols to enrich its routing information.
  B. While importing routes from a routing protocol to another, we can define a route-policy to filter out the unexpected routes.
  C. In the process of route importing, it is necessary to specify a metric for the imported route if the target routing protocol cannot directly use the metric of the source routing protocol.
  D. Bi-directional importing indicates that two routing protocols import the routes from each other. It may cause routing loop.
  Answer: ABCD

  12. The default preference of OSPF route in the H3C router is ( ).
  A. 5
  B. 10
  C. 15
  D. 20
  Answer: B

  13. Which of the following descriptions about queue is correct? ( )
  A. WFQ discarding mechanism is Tail Drop on each queue, the same as CQ.
  B. WFQ classifies data flow by using ACL.
  C. CBWFQ is an improvement of WFQ using the same basic scheduling as WFQ.
  D. LLQ will first check the low-latency queue and take packets from the queue. Only when there is no packet in the low-delay queue, it will take the packets from other queues. In addition, it uses other mechanisms to avoid starving to death of the queues.
  Answer: D

  14. CAR is realized at the IP layer so that it can only limit the traffic of IP packets. Compared with CAR, LR can limit all the traffic passing through the physical interface.
  A. True
  B. False
  Answer: A

  15. As described in the OSPF protocol, there must be an Area 0 in the network running OSPF.
  A. True
  B. False
  Answer: B

  16. Which of the following descriptions about OSPF is correct? ( )
  A. Data is sent by means of multicast.
  B. On receipt of a route update, a router immediately advertises its routing table to its neighbors.
  C. Routing loop can be avoided by poison reverse.
  D. Support equal-cost multipath .
  Answer: D

  17. Which of the following descriptions about the IPSec Security Association (SA) is/are correct? ( )
  A. The data security service provided by IPSec is realized through SAs.
  B. One SA is a unidirectional logical connection between two IPSec peers.
  C. The inbound data flow and outbound data flow are respectively processed by the inbound SA and outbound SA.
  D. SAs can be set up by the means of manual configuration or automatic negotiation.
  Answer: ABCD

  18. Which of the following descriptions about BGP route aggregation is/are correct? ( )
  A. Route aggregation is to aggregate routes of all segments into one or more aggregation routes so as to reduce the size of routing table.
  B. If the keyword detail-suppressed is added to the BGP summary command, only the aggregation routes are advertised.
  C. BGP route aggregation takes effect on the route imported through the network command only.
  D. BGP route aggregation takes effect on the route imported through the import command only.
  Answer: AB

  19. A BGP router receives a new route from its EBGP peer, which of the following descriptions is correct? ( )
  A. The router will immediately send the route to its BGP peers.
  B. The router will look up this route in its routing table. If the route is not recorded in the routing table, it will send the route to its BGP peers.
  C. The router will check the sent routes information. If it never sends such a route, it will send the route to its BGP peers.
  D. The router will check the sent routes information. If it has sent such a route, it will not send the route to its BGP peers.
  Answer: C

  20. When a BGP Speaker advertises the imported IGP routes to the IBGP neighbor, the AS-Path value is the local AS number.
  A. True
  B. False
  Answer: B

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