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  Huawei认证GB0-280English考试题库介绍

  考试代号: GB0-280English
  问题数量:297 Q&As
  
  更新时间: 2009-09-25
  注册地点: Prometric/Pearson VUE
  题库全称:Constructing Enterprise-level Routing Networks

  免费GB0-280English题库Demo赏析

  　
  　
  Exam : Huawei GB0-280
  Title : Huawei(r) Constructing Enterprise-level Routing Networks

  1. Bi-directional Import refers to that routes are imported mutually between routing protocols. To prevent route loop, you can ( )
  A.prohibit route redistributing from 2 different routing processes which runs over the same router into each other.
  B.Use filter-policy import
  C.Use filter-policy export
  D.Use fire-wall
  Answer: ABC

  2. BGP community is a group of destinations with public attributes. For a network or an AS there can be only one community. ( )
  T.True
  F.False
  Answer: F

  3. RTA notifies RTB about a learned route 1.1.1.0/24 from the EBGP peer. RTA and RTB are in the same AS. The attributes of the route are listed as the following:
  local preference:100
  MED: 100
  AS_PATH: 200
  Origine: EGP
  Next_hop: 88.8.8.1/16
  The attributes of the received route by RTB will be ( )
  A.Local preference: null, MED: 100,
  　　AS_PATH: 200 100 ,Origine :EGP, next_hop: 10.110.20.1/16
  B.Local preference:100, MED: 100,
  　　AS_PATH: 200 ,Origine: EGP, next_hop: 88.8.8.1/16
  C.Local preference:100, MED: null,
  　　AS_PATH: EGP, Origine :EGP, next_hop: 10.110.10.1/16
  D.Local preference: null, MED: 0,
  　　AS_PATH: 100 200, Origine: EGP, next_hop: 88.8.8.1/16
  Answer: B

  4. The packets of OSPF are encapsulated in the IP . The protocol number used is ( ).
  A.23
  B.89
  C.520
  D.170
  Answer: B

  5. Which are the right one/ones about OSPF among the following descriptions? ( )
  A.If some changes take place on the network topology, OSPF immediately dispatches an update packet, and synchronizes these changes to the Autonomous System.
  B.Comparing with RIP, it can save bandwidth.
  C.It supports the dispatch of protocol packets with multicast addresses.
  D.The measure ranges 0 through 255.
  E.It supports equivalent value routes to the same destination address.
  F.Its algorithm prevents self-loop routes.
  G.It supports Variable Length Subnet Mask (VLSM)
  Answer: ABCEFG

  6. Which of the following are right about ESP? ( )
  A.ESP encapsulates the data to an IP packet after encryption to ensure its privacy.
  B.The user can choose the encrypted Hash algorithm to ensure integrity and authenticity of the packet.
  C.In conjunction with anti-replay window and packet authentication, the AH protocol adopts 32 bits sequence number to prevent and defend replay attacks.
  D.Under transmission mode, the AH protocol encrypts the effective data in the IP packet.
  E.Under the tunnel mode, the AH protocol encrypts the entire IP packet.
  Answer: ABCDE

  7. In which ways can VPN benefit the ISP (Internet Service Provider) and VPN user? ( )
  A.ISP can build a long-term cooperation with enterprises and extend the service, taking advantage of the existent network resource.
  B.It is cost-saving for VPN users.
  C.The VPN user can transfer the WAN maintenance task to the profession ISP.
  D.The enterprise can allocate network address to the VPN user in a unified way.
  E.The private data transmitted through the pubic network is guaranteed with security.
  Answer: ABCDE

  8. Which of the following is the way to avoid loop in the BGP protocol? ( )
  A.Record the source of the route in the attribute: origin
  B.Record the AS route in the attribute: AS-Path
  C.Record the next hop in the Next-Hop attribute
  D.Affect the choice of egress for another AS in the MED attribute
  Answer: B

  9. Which is wrong about the BGP protocol? ( )
  A.BGP is a robust routing protocol.
  B.BGP is to check the route loop.
  C.BGP can not summary routes of the same type.
  D.BGP inherits from EGP
  Answer: C

  10. Why average length of the queue is adopted to check the length of the queue in WRED? ( )
  A.Because the queue length can not be calculated directly.
  B.Average Queue can balance the resource seizure.
  C.Comparing the queue length (the absolute length of the queue) with the thresholds before dropping the packet will lead to unfairness to the burst traffic, which is disadvantageous to traffic transportation.
  D.The average length of the queue is related with the types of the supported services.
  Answer: C

  11. Which of the following are the right description to the adjacency between routers in the OSPF protocol? ( )
  A.Two routers, if they are in bidirectional adjacency, that is, they receive the Hello message from each other, they automatically become adjacent.
  B.If two routers are adjacent, the underlying network between them is probably Point-to-Point.
  C.If two routers are adjacent, the underlying network between them is probably Point-to-MultiPoint.
  D.If two routers are adjacent, the underlying network between them is probably Broadcast. One of them must be a DR or BDR.
  E.Only when the two routers are adjacent will they exchange the LSA message.
  Answer: BCDE

  12. In the BGP protocol, the function of the community attribute NO-EXPORT is to ( )
  A.Indicate that the route with this attribute should not be notified to any peer out of the alliance
  B.Indicate that the route with this attribute, once received, should not be notified to any BGP peer.
  C.Indicate that the route with this attribute, once received, should not be notified to any EBGP peer.
  D.None of the above
  Answer: A

  13. Two routers running the OSPF protocol are synchronizing the Link State Database. When you check the peer state machine on one of them, it indicates it has reached the FULL state. Therefore, such a conclusion can be drawn that if you check the peer state machine from the other router, it should also indicate that it has reached the FULL state. ( )
  T.True
  F.False
  Answer: F

  14. How many attributes can every RADIUS packet carry? ( )
  A.1
  B.2
  C.3
  D.Multiple
  Answer: D

  15. In which ways does OSPF describe the network topology? ( )
  A.There is only one router on which the port is connected to the network segment.
  B.The port connects to a router through point-to-point network.
  C.The port connects to multiple routers through broadcast or NBMA network.
  D.The port connects to multiple routers through point-to-multipoint network.
  Answer: ABCD

  16. The right description to the OSPF protocol are ( )
  A.It is a link state-based protocol running in the AS and developed by IETF.
  B.According to the collected link state information, OSPF calculates the shortest path to get the route.
  C.It allows the AS network to be partitioned into areas. The route information transmitted between areas is further abstracted to reduce seizure of bandwidth.
  D.It transmits the packet ACcording to the multicast address at the multicast-enabled data link layer, which greatly reduces the interference to the other network equipment.
  Answer: ABCD

  17. The route will be matched with each if-match clause under the node of the route-policy in order. Passing one if-match clause means passing the whole route-policy. ( )
  T.True
  F.False
  Answer: F

  18. which of the following are the right description to the backbone area? ( )
  A.The backbone area ID is 0.0.0.0.
  B.All other areas must connect to the backbone area.
  C.Between the backbone areas it can be disconnected.
  D.Each ABR (Area Border Router) should be connected to at least one backbone area.
  Answer: ABD

  19. In what ways that the Integrated Service varies from Best-Effort services? ( )
  A.First Come, First Served.
  B.Guaranteed Service
  C.Controlled-Load Service
  D.Service similar to ISDN
  Answer: BC

  20. To view the information of the DR and BDR in the OSPF area, you can use ( )
  A.Display ospf
  B.Display ospf error
  C.Display ospf interface
  D.Display ospf peer
  Answer: A

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