Real questions and answers

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Real questions and answers
　
　
Exam : Huawei SU0-123
Title : Huawei Certified Datacom Professional-Building IP Telecom Network

1. LDP PDU头部的长度为（）个字节
A. 10
B. 20
C. 40
D. 10～40
Answer: A

2. 一个OSPF进程可以属于多个VPN-instance。
A. True
B. False
Answer: B

3. 传统IP转发在流量工程方面的描述正确的有
A. 考虑了带宽、链路属性等因素
B. 基于IGP面向目的地址的转发
C. 可以根据来源进行控制流量转发
D. 是面向连接的，可以实现显式路径
Answer: B

4. 以下哪个状态是LDP Session成功建立的标志
A. INITIALIZED
B. OPENREC
C. OPENSENT
D. OPERATIONAL
Answer: D

5. 在VRP5中LDP环路检测的路径向量
A. 缺省值为16
B. 缺省值为15
C. 缺省值为32
D. 缺省值为32
Answer: C

6. 以下关于基于接口的标签空间描述不正确的是
A. LSR为一个目的地址只分配一个标签
B. 一台LSR的入标签不可能相同
C. 和基于平台的标签空间相比，具有更高的安全性
D. 当LSR收到带标签的报文，只检查入标签进行转发而并不检查入接口
Answer: ABD

7. 以下哪条命令用于Egress节点向倒数第二跳分配显式空标签，值为0 ?
A. label advertise explicit-null
B. label advertise implicit-null
C. label advertise non-null
D. label advertise total
Answer: A

8. MPLS BGP VPN中，当MPLS VPN用户路由转换为VPNv4路由传递时，携带哪种Route Target？
A. Export RT
B. Implied RT
C. Import RT
D. Extended RT
Answer: A

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Real questions and answers
　
　
Exam : HuaWei GB0-360
Title : Designing Enterprise-level Networks

1. Which of the following support data forwarding and path selection? ( )
A.S3026E
B.S3526E
C.Routers
D.Hubs
Answer: bc

2. A frame relay network can be full-meshed. If there are 6 routers connected to the frame relay network, the required number of PVCs will be ( ).
A.6
B.5
C.15
D.30
Answer: c

3. To transmit IP voice, compression algorithm is adopted, such as the frequently used G.729. After compressed, what is the bandwidth seized by a channel of voice? ( )
A.75Kbps
B.12Kbps
C.64Kbps
D.8Kbps
Answer: b

4. POS is a technology to bear IP and other packets over the SONET/SDH.Which layer is POS defined in the OSI model? ( )
A.Data link layer
B.Physical layer
C.Network layer
D.Transport layer
E.Application layer
Answer: a

5. Which of the following is the network operation system that Huawei has intellectual proprietary and it supports multiple equipments of Huawei? ( )
A.IOS
B.DOS
C.VRP
D.Quidway
Answer: c

6. All work stations can make full use of the bandwidth in the CSMA/CD network. ( )
T.True
F.False
Answer: f

7. A topology has to be chosen for a LAN or a WAN. Which topology has the smallest delay, the highest reliability but the most complicate management? ( )
A.Star
B.Tree
C.Ring
D.Mesh
Answer: d

8. Which are the advantage of the hierarchical network design model? ( )
A.Easy to extend
B.Easy for diagnosis and troubleshooting
C.Easy for management
D.Cost saving
Answer: abcd

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Real questions and answers
　
　
Exam : Huawei GB0-360
Title : Designing Enterprise-level Networks

1. 网络的生命周期不包括网络的维护阶段说法是否正确（ ）
T. True
F. False
Answer: F

2. 在收集网络中大型机的性能需求时，可能考虑以下哪些问题（ ）
A. 备份要求
B. 安全性
C. 可利用率
D. 数据库系统
Answer: ABCD

3. 网络设计人员通过与用户群交流，获取用户对网络的需求信息。这中间要注意以下那些环节（ ）
A. 了解用户人员组织结构，与适当的人员进行交流
B. 区分哪些用户需求由用户完成，哪些在设计中完成
C. 列出对网络的性能需求
D. 得到对网络投资的数据
Answer: ABCD

4. 不同用户对网络的需求是不一样的，以下不属于需求分析阶段的是（ ）
A. 明确用户对网络的投资规模
B. 了解用户目前网络运行情况
C. 明确网络需要解决的问题
D. 确定网络的拓扑结构
Answer: D

5. 在大多数网络设计中存在的一对主要矛盾是（ ），正确的理解它，对网络设计性能的提高非常有帮助。
A. 网络安全性和实时性之间的矛盾
B. 成本和网络性能之间的矛盾
C. 投资规模和网络未来增长之间的矛盾
D. 网络可靠性和响应时间之间的矛盾
Answer: B

6. 进行网络需求分析第一步是收集用户需求，以下关于需求来源说法正确的是（ ）
A. 需求的来源可能来自国家或特定行业的政策
B. 决策者的思路对网络需求有重要影响
C. 历史资料
D. 可以通过与用户技术人员的沟通获得需求信息体
Answer: ABCD

7. 以下哪些因素会影响网络的可伸缩性（ ）
A. 公司人员的变化
B. 远程办公的需求
C. 移动办公的需求
D. 业务的变化
Answer: ABCD

8. 以下属于企业网络系统构成元素的有（ ）
A. 操作系统
B. PC 机
C. 路由器
D. 以太网交换机
Answer: ABCD

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Real questions and answers
　
　
Exam : Huawei GB0-280
Title : Huawei(r) Constructing Enterprise-level Routing Networks

1. 下面有关BGP协议描述，错误的是（）
A. BGP　是一个很健壮的路由协议
B. BGP　可以用来检测路由环路
C. BGP　无法聚合同类路由
D. BGP　是由　 EGP　继承而来的
Answer: C

2. 在BGP协议中，对环路的避免的方法有（　 　）
A. 在路由的origin　属性中记录路由的起源
B. 在路由的AS-Path　属性中记录所有途经的　 AS
C. 在路由的Next-Hop　属性中纪录路由的下一跳
D. 在路由的MED属性中影响另一AS的出口选择
Answer: B

3. 两台运行OSPF　协议的路由器正在进行链路状态数据库的同步，从其中一台上查看邻居状态机，已经达到FULL状态。则可以推断出如下结论：此时在另一台路由器查看邻居状态机，应该同样达到　 FULL　状态。( )
T. True
F. False
Answer: F

4. BGP的团体是一组有公共性质的目的地。一个团体限于一个网络或一个自治系统（　）
T. True
F. False
Answer: F

5. 在BGP路由协议中，公认团体属性NOEXPORT的作用是（　 ）
A. 传递这一团体属性值的路由不应被通告给一个联盟之外的对等体
B. 传递这一团体属性值的路由，在收到后，不应通告给任何　 BGP　的对等体
C. 传递这一团体属性值的路由，在收到后，不应通告给任何　 EBGP　的对等体
D. 以上都不对
Answer: A

6. 查看OSPF区域ABR、ASBR的信息，可以使用（　 　）
A. Display ospf
B. Display ospf error
C. Display ospf interface
D. Display ospf peer
Answer: A

7. 对于OSPF协议中路由器之间的邻接关系（adjacency），下面说法正确的有（）
A. 两台路由器，只要是双向的邻居关系（相互收到了对方的Hello报文），就自动成为了邻接关系
B. 两台路由器如果是互为邻接关系，则它们之间的承载网络（underlying network）类型有可能是　 point-to-point
C. 两台路由器如果是互为邻接关系，则它们之间的承载网络（underlying network）类型有可能是　 Point-to-MultiPoint
D. 两台路由器如果是互为邻接关系，而且它们之间的承载网络（underlying network）类型是Broadcast，则必然有一台路由器是DR或者是BDR
E. 只有两台路由器是互为邻接关系，它们之间才交换LSA信息
Answer: BCDE

8. 下列关于骨干区域的描述，正确的是（　 ）
A. 骨干区域号的areaid是0.0.0.0
B. 所有区域必须与骨干区域相连
C. 骨干区域之间可以是不连通的
D. 每个区域边界路由器ABR连接的区域中至少有一个是骨干区域
Answer: ABD

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Real questions and answers
　
　
Exam : Huawei GB0-280
Title : Huawei(r) Constructing Enterprise-level Routing Networks

1. 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

2. 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

3. 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

4. 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

5. 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

6. 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

7. 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

8. 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

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Real questions and answers
　
　
Exam : Huawei GB0-320
Title : Huawei(r) Constructing Enterprise-level Switching Networks

1. 以下几种以太网标准中支持速率自协商的有
A. 10BASE-T
B. 100BASE-TX
C. 1000BASE-LX
D. 1000BASE-SX
Answer: AB

2. 多层交换可以依据如下信息进行交换（）
A. 源MAC地址和目的MAC地址
B. 源IP地址和目的IP地址
C. 地址源端口和目的端口
D. IP包协议字段
Answer: ABCD

3. IEEE802.1Q协议中规定的VLAN报文比普通的以太网报文增加了以下哪几部分（ ）
A. TPID （Tag Protocol Indentifier）
B. Priority
C. Canonical Format Indicator( CFI )
D. VLAN Identifier( VLAN ID )
Answer: ABCD

4. IEEE802.3把以太网链路层分成两个子层 , 分别是（ ）
A. 物理子层
B. MAC子层
C. LLC子层
D. IP子层
Answer: BC

5. 如下图所示配置，
Port 1至Port 4 端口对应的链路为允许所有VLAN通过的干道链路，且都启动了GVRP协议。其中，交换机1的Port 1端口GVRP注册类型配置为Fixed，其它交换机的端口GVRP注册类型配置为Normal。在交换机1上配置有VLAN 5、VLAN 6，在交换机3上配置有VLAN 6 、VLAN 7。下列是关于各交换机端口除缺省VLAN外的VLAN配置情况的描述，其中正确的选项为（ ）
A. Port 1 配置有VLAN 5至VLAN 7
B. Port 2 配置有VLAN 5至VLAN 6
C. Port 3 配置有VLAN 6和VLAN 7
D. Port 4 配置有VLAN 5至VLAN 7
Answer: C

6. 如果需要设置Quidway S3526以太网端口10的工作速率仅为100Mbit/s，使用以下哪条命令
A. speed 10
B. speed 100
C. speed auto
D. speed full
Answer: B

7. GARP本身仅仅是一个协议规范，不作为一个实体在交换机中存在。遵循GARP协议的应用实体称为GARP应用（ ）
T. True
F. False
Answer: T

8. 以下关于端口汇聚的说法正确的是
A.可以应用在交换机和交换机的连接
B.可以应用在交换机和路由器的连接
C.不能应用在高速服务器之间的连接
D.不能应用在交换机和高速服务器之间的连接
Answer: AB

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Real questions and answers
　
　
Exam : Huawei GB0-320
Title : Huawei(r) Constructing Enterprise-level Switching Networks

1. Which of the following descriptions of port aggregation technology are true?
A.This technology is applied in the connection between switch and switch
B.This technology is applied in the connection between switch and router
C.The technology is not applied in the connection between the high-speed server
D.This technology is not applied in the connection between the switch and the high-speed server
Answer: ab

2. As shown in the following figure, the corresponding links of Port 1 ~ Port 4 are the trunk links allowing all the VLANs to pass and the GVRP protocol is activated. The GVRP registration mode of Port 4-switch 3 is set to be Forbidden and the GVRP registration modes of the ports on other switches are set to be Normal. VLAN5 and VLAN6 are configured on the switch 1 and VLAN 6 and VLAN 7 are configured on the switch 3. The following are the VLAN configuration situations of the ports of the switch except the default VLAN. Which of the items are true? ( )
A.VLAN 5 and VLAN 6 are configured over port 1.
B.VLAN 5~VLAN 6 are configured over port 2.
C.VLAN 6 and VLAN 7 are configured over port 3.
D.VLAN 6 and VLAN 7 are configured over port 4.
Answer: ab

3. If setting the working rate of Quidway S3526 Ethernet port 10 only to be 100Mbit/s, which of the following commands should be used?
A.speed 10
B.speed 100
C.speed auto
D.speed full
Answer: b

4. Multiple layer switching is realized according to the following information. ( )
A.Source MAC address and destination MAC address
B.Source IP address and destination IP address
C.source port number and destination port number
D.IP packet protocol numbe
Answer: abcd

5. The Ethernet link layer is divided into two sub-layers by IEEE802.3. The two sub-layers are: ( )
A.Physical sub-layer
B.MAC sub-layer
C.LLC sub-layer
D.IP sub-layer
Answer: bc

6. The GARP itself is only a protocol specification but not an entity existing in the switch. The application entity that observes the GARP protocol is called the GARP application. ( )
T.True
F.False
Answer: t

7. The two sub-layers are: ( )
A.Physical sub-layer
B.MAC sub-layer
C.LLC sub-layer
D.IP sub-layer
Answer: bc
3.Which of the following Ethernet standards support speed rate auto-negotiation? ( )
A.10BASE-T
B.100BASE-TX
C.1000BASE-LX
D.1000BASE-SX
Answer: ab

8. Compared with the common Ethernet packet, which of the following items are newly added in VLAN packet ruled in IEEE802.1Q protocol? ( )
A.TPID (Tag Protocol Identifier)
B.Priority
C.Canonical Format Indicator (CFI)
D.VLAN Identifier (VLAN ID)
Answer: abcd

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Real questions and answers
　
　
Exam : Huawei GB0-180
Title : Huawei(r) Certified Network Engineer (HCNE)

1. Input display interface on Huawei Quidway router, and which of the following information you will see?
A.The descriptions ABout the interface
B.The route information concerning the said interface
C.Error statistics
D.Interface status
Answer: ACD

2. The basic functions of transport layer are:
A.Segment upper-layer data
B.Create end-to-end connection
C.Transmit data from the host at one end to the host at the other end
D.Ensure the stABility of data transmission
Answer: ABCD

3. The principle used to evaluate the routing algorithm does NOT include( )
A.Fast convergence
B.Flexibility
C.ADvancement in topology structure
D.If the path selected is the best
Answer: C

4. Which of the following command is usually used for remote loggin( )
A.PING
B.TRACERT
C.TELNET
D.IPCONFIG
Answer: C

5. In the router, which of the following command can be used to view the routing tABle of a router( )
A.ARP -A
B.TRACERT
C.ROUTE PRINT
D.DISPLAY IP ROUTING-TABLE
Answer: D

6. ( ) is a kind of broADcast, through which the host can dynamically discover the MAC ADdress corresponding to one IP ADdress
A.ARP
B.DNS
C.ICMP
D.RARP
Answer: A

7. Which of the following is the function of the session layer( )
A.To provide encryption/decryption
B.To provide data conversion and format
C.To set up connections between different hosts
D.To set up session between two applications
Answer: D

8. IEEE802.3 Ethernet ADopts ( ) to support bus topology ,it is ABbreviated from ( ).
A.STP Spanning Tree Protocol
B.STP Shortest Tree Protocol
C.CSMA/CD Carrier Sense Multicast Access/Collision Detection
D.CSMA/CD Carrier Sent Multicast Access/CRC Detection
E.CSMA/CD Carrier Service Multiple Access/Collision Detection
F.CSMA/CD Carrier Sense Multiple Access/Collision Detection
Answer: F

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Real questions and answers
　
　
Exam : Huawei GB0-180
Title : Huawei(r) Certified Network Engineer (HCNE)

1. 一台在北京的路由器显示如下信息：
traceroute to Shengzhen(18.26.0.115),30 hops max 1 Beijing.cn 0 ms 0ms 0ms 2 rout1.cn 39 ms 39ms 39ms,用户在该路由器上输入了哪个命令（）
A. [Quidway]ping Shengzhen
B. [Quidway]host Shengzhen
C. [Quidway]Telnet Shengzhen
D. [Quidway]tracert Shengzhen
Answer: D

2. 在ＩＳＯ定义的七层参考模型中，对数据链路层的描述正确的是：
A. 实现数据传输所需要的机械，接口，电气等属性
B. 实施流量监控，错误检测，链路管理，物理寻址
C. 检查网络拓扑结构，进行路由选择和报文转发
D. 提供应用软件的接口
Answer: B

3. 关于Hub以下说法正确的是（）
A. Hub可以用来构建局域网
B. 一般Hub都具有路由功能
C. Hub通常也叫集线器，一般可以作为地址翻译设备
D. 一台共享式以太网Hub下的所有PC属于同一个冲突域
Answer: AD

4. 路由器的主要功能不包括（）
A. 速率适配
B. 子网协议转换
C. 七层协议转换
D. 报文分片与重组
Answer: C

5. 在Quidway路由器上输入"display rip"命令，如下所示：
[Quidway]display rip RIP is turning on
checkzero is on default-cost : 16 no peer network all
summary is on preference : 100
下列说法正确的是：
A. 这条命令显示了RIP当前运行状态和配置信息
B. 默认情况下，RIP路由协议优先级为100，但可以通过"priority"命令来修改RIP路由协议的优先级
C. 这条命令显示路由器所有接口启用了RIP协议，最大可达跳计数为16
D. no peer显示这台路由器没有与任何其它路由器直连
Answer: A

6. 可路由网络协议的网络层地址由哪两部分组成（）
A. 网络地址和主机地址
B. 主机地址和网络掩码
C. 网络地址和网络掩码
Answer: A

7. 在数据链路层哪个子层用于管理在一条链路上设备间的通信（）
A. LLC
B. MAC
C. BIG MAC
Answer: A

8. 下列哪种地址类型用来支持组播（）
A. A类
B. B类
C. E类
D. 以上都不是
Answer: D

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Real questions and answers
　
　
Exam : Huawei SU0-122
Title : Huawei Certified Datacom Professional-Building Carrier Routing Network (HCDP-BCRN)

1. 0.0.1
C. FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF
D. ::1
Answer: A

2. 255.248.0
B. 10.110.43.10，255.255.0.0
C. 10.110.43.10，255.255.248.0
D. 10.110.48.10，255.255.252.0
Answer: A

3. NAT能转换的网络地址是?
A. IP
B. IPX
C. AppleTalk
D. DECNET
Answer: A

4. IPv6基本报文头部长度固定为（ ）字节。
A. 40
B. 20
C. 60
D. 30
Answer: A

5. 假设IP地址10.110.53.233的掩码和下列选项IP地址的掩码相同，则下列地址中与该IP地址在同一网段的有?
A. 10.110.48.10，255.255.248.0
B. 10.110.43.10，255.255.0.0
C. 10.110.43.10，255.255.248.0
D. 10.110.48.10，255.255.252.0
Answer: AB

6. 10，255.255.248.0
B. 10.110.43.10，255.255.0.0
C. 10.110.43.10，255.255.248.0
D. 10.110.48.10，255.255.252.0
Answer: AB
4. 某IP地址的掩码取反后与该IP地址相与，所得的非零点分十进制数，是此IP地址的?
A. A类地址
B. 主机地址
C. 网络地址
D. 解析地址
Answer: B
5. 在IPv6中，未指定地址为?
A. ::
B. ::127.0.0.1
C. FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF
D. ::1
Answer: A
6. IPv6基本报文头部长度固定为（ ）字节。
A. 40
B. 20
C. 60
D. 30
Answer: A
7. 数据链路层使用协议类型（ ）来标识OSI协议族。
A. 0xFEFE
B. 0xEFEF
C. 0xFFFF
D. 0xEEEE
Answer: A
8. 不管区域划分如何，以下哪些IS之间一定可以建立邻接关系
A. Level-1路由器和Level-1路由器
B. Level-1路由器和Level-2路由器
C. Level-2路由器和Level-2路由器
D. Level-1路由器和Level-1-2路由器
E. Level-2路由器和Level-1-2路由器
F. Level-1-2路由器和Level-1-2路由器
Answer: CEF

7. 以下关于在OSPF协议中，Router LSA的Link ID字段描述不正确的是?
A. 在Point-to-Point链路类型中，Link ID是邻居接口的端口IP地址
B. 在TransNet链路类型中，Link ID是此TransNet网段的网络地址
C. 在StubNet链路类型中，Link ID是Stub网段的网络地址
D. 在Virtual链路类型中，Link ID是虚连接邻居的Router ID
Answer: AB

8. 某IP地址的掩码取反后与该IP地址相与，所得的非零点分十进制数，是此IP地址的?
A. A类地址
B. 主机地址
C. 网络地址
D. 解析地址
Answer: B

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Real questions and answers
　
　
Exam : Huawei SU0-121
Title : Huawei Cert Datacom Pro-Building Carrier Access Network

1. 选出下列关于GVRP协议的叙述中错误的选项?
A. GVRP基于GARP的工作机制，维护交换机中的VLAN动态注册信息
B. GVRP是Generic Virtual Router Protocol的缩写
C. GVRP传播的VLAN注册信息包括本地手工配置的静态注册信息和来自其它交换机的动态注册信息
Answer: B

2. VLAN标记中包含有（ ）比特用于标识数据帧所属的VLAN
A. 4
B. 32
C. 12
D. 8
Answer: C

3. 如下图所示组网与配置，LS1、LS2、LS3的互连端口1、4、5、6配置为Trunk端口并允许所有VLAN通过，且都启动了GVRP协议。
其中，端口 1 的GVRP注册类型配置为Fixed，端口4、5、6的GVRP注册类型配置为Normal。在LS1上配置有VLAN 5 、VLAN 6，在LS3上配置有VLAN 6 、VLAN 7。
假设一切配置都正常的情况下，使用display interface命令查看端口1、4、5、6，以下关于各端口信息描述正确的是?
A. Port 1：vlan passing 5-7
B. Port 4：vlan passing 5-6
C. Port 5：vlan passing 5-7
D. Port 6：vlan passing 6-7
Answer: B

4. 以下关于生成树协议处理链路故障的说法错误的是？
A. 链路失去连通性对用户来说就是无法正常通讯，所以对生成树协议来说，其首要目的是防止链路失去连通性。即临时回路可以让其发生，但绝对不能让链路失去连通性。
B. 由于链路故障在网络中传播有一定的延迟，所以为了防止临时回路的产生，生成树协议引入了一个中间状态即Learning状态。
C. 为了防止临时回路的产生，生成树协议在将端口由阻塞状态迁移到转发状态时，需要一定的时间延迟。
D. 生成树协议无法避免链路会临时失去连通性。
Answer: A

5. Isolate-user-vlan和Secondary vlan的映射关系建立后，可以直接执行删除Secondary vlan的操作。
T. TruE.
F. False
Answer: F

6. 交换机的Trunk端口发送数据帧时，不检查数据帧中携带的VLAN ID，直接将数据帧透传。
TruE.
False
Answer: F

7. 广播风暴是如何产生的？
A. 大量ARP报文产生
B. 存在环路的情况下，如果端口收到一个广播报文，则广播报文会复制从而产生广播风暴
C. 站点太多，产生的广播报文太多
D. 交换机坏了，将所有的报文都广播
Answer: B

8. 运行GVRP协议时，如果处于同一组环境中的交换机的定时器配置不同，将会引起学习不稳定的问题。
A. TruE.
B. False
Answer: T