GB0-280-s

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QUESTION NO: 1 Huawei GB0-280: Practice Exam

Why average length of the queue is adopted to check the length of the queue in WRED? ( )

A. The average length of the queue is related with the types of the supported services. B. 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. C. Average Queue can balance the resource seizure. D. Because the queue length can not be calculated directly.

Answer: B QUESTION NO: 2

Which are the right one/ones about OSPF among the following descriptions? ( )

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

Answer: A,B,C,D,F,G QUESTION NO: 3

Which of the following are right about the standard access list and the extended access list when they being used in the route filtering ? ( )

A. Standard Access List is to match the destination segment address or the next hop of the route. B. Extended Access List is to match its destination address field with the destination segment address field. C. Extended Access List is to match its source address field with the source segment address field of the route. D. Extended Access List is to match its source address field with the destination segment address field of the route.

Answer: A,D

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QUESTION NO: 4

Huawei GB0-280: Practice Exam

When a route is imported to the RIP routing protocol, if no metric is specified, which of the following will be taken as the default? ( )

A. 255 B. 254 C. 15 D. 16

Answer: D QUESTION NO: 5

Which field is under encryption in the Radius packet? ( )

A. The whole packet B. IP address of NAS C. Password+ Username D. Key


According to the OSPF protocol, the Router ID must be unique in the AS internal. Because the Router LSA only performs intra-area propagation, even there are two intra-area routers, belonging to two different areas though, with the same Router ID, it will result in no calculating errors. ( )

A. False B. True

Answer: A QUESTION NO: 7

which of the following are the right description to the partition of areas: ( )

A. To shorten the synchronization time of LSDB between the routers.


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Huawei GB0-280: Practice Exam B. it is disadvantageous to the route summarization. C. To reduce the scale of the LSDB D. To mitigate the operating complexity of the SPF algorithm.

Answer: A,C,D QUESTION NO: 8

Which of the following are right? ( )

A. GRE is a layer 3 tunnel protocol. B. L2TP is an indispensable protocol to implement VPN. C. To implement VPN, you can use both the GRE and L2TP. D. GRE adopts tunnel technique at the data link layer.

Answer: A,C QUESTION NO: 9

Which of the following are right about Local-preference? ( )

A. Local-Preference is of native for the AS. It is meant for exchange between IBGP peers, and will not be sent to EBGP peers. B. The Update packet between the IBGP peers must contain Local-Preference; otherwise the system will report error and interrupt the connection. C. The Update packet between the IBGP peers does not have to contain Local- Preference. D. Local-preference is to help the router in AS internal choose a more appropriate egress to the AS external.

Answer: A,B,D QUESTION NO: 10

Which of the following are the wrong description to the BGP route attributes? ( )

A. Mandatory attributes refer to the essential attribute of each route, such as the next hop; while the optional can be omitted. B. The router should propagate the attribute to other peers when it receives a transitional attribute, such as metric. C. Local-preference is for the route to reach the destination with priority in the AS internal. D. Community identifies a group of routers with the same attributes. It has something to do with the AS, but nothing with the IP subnet.

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Answer: B,D QUESTION NO: 11


What is the maximum PQs (Priority Queues) that the Quidway series routers can create? ( )

A. 8 B. 2 C. 6 D. 4


According to the networking applications, VPN can be classified to ( )

A. Extranet VPN B. Access VPN C. Intranet VPN D. Client initiated VPN

Answer: A,B,C QUESTION NO: 13

If a regular expression is ^70*$, then the matched AS-Path will be: ( )

A. 70 B. null (which means locally originated route) C. 7000 D. 700 E. 701

Answer: A,C,D,E QUESTION NO: 14



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Huawei GB0-280: Practice Exam A. The average length of the queue is related with the types of the supported services. B. Because the queue length can not be calculated directly. 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. Average Queue can balance the resource seizure.

Answer: C QUESTION NO: 15

Specify an interface of a router to Area 2. Which of the following are right commands to do it? ( )

A. [Quidway-Serial0] ospf en area 2 B. [Quidway-Serial0] ospf enable area 2 C. [Quidway] ospf enable area 2 D. [Quidway-Ethernet0]ospf enable area 2


Bi-directional Import refers to that routes are imported mutually between routing protocols. To prevent route loop, you can ( )

A. Use filter-policy import B. prohibit route redistributing from 2 different routing processes which runs over the same router into each other. C. Use fire-wall D. Use filter-policy export


Which of the following command is to manually aggregate the BGP route? ( )

A. summary bgp... B. aggregate X.X.X.X ... C. aggregate D. area..range


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Which of the following are right about the relation between the route-policy and the filter? ( )

A. Use ip ip-prefix and acl when advertising the route. B. Use ip ipprefix and acl when matching the IP address with the route policy. C. Use the route-policy when importing the route. D. Use ip ip-prefix, acl and gateway when receiving the route.

Answer: A,B,C,D QUESTION NO: 19

Which of the following are right description to the authentication between the RADIUS client and server when a PPP user dials in? ( )

A. If PAP is adopted, the password will be transmitted in cipher text between the client and the server. B. If CHAP is adopted, the password will be transmitted in plaintext between the client and the server. C. If PAP is adopted, the password will be transmitted in plaintext between the client and the server. D. If CHAP is adopted, the password will be transmitted in cipher text between the client and the server.

Answer: C,D QUESTION NO: 20

The right procedure for the OSPF protocol to calculate the route is ( )

A. Every router produces a LSA according to the topology around it. B. Calculated on the collected LSAs to span a shortest path tree. C. Send the LSA to the other routers in the network, and meanwhile collect the LSA produced by other routers. D. Produce the Link-State Database. E. A-C-D-B F. D-A-C-B G. A-C-B-D


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H. A-B-C-D



If you want to modify the precedence of the packet from Ethernet 0 on a Quidway router to 7, which command should you use?

A. qos car outbound any cir 8000 cbs 15000 ebs 0 conform remark-prec-pass 7 exceed remark- prec-pass 7 B. qos car outbound any cir 8000 cbs 15000 ebs 0 conform remark-prec-pass 7 exceed remark- prec-continue 7 C. qos car outbound any cir 8000 cbs 15000 ebs 0 conform remark-prec-pass 7 exceed remark- prec-pass drop D. qos car inbound any cir 8000 cbs 15000 ebs 0 conform remark-prec-pass 7 exceed remark- prec-pass 7


The Origin attribute of the route imported in BGP through the network command is EGP. ( )

A. False B. True


Which is the port number when BGP transmits the route with TCP at the transport layer? ( )

A. 89 B. 520 C. 179 D. 180

Answer: C


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Which of the following are right about the UPDATE packet in the BGP routing protocol? ( )

A. A packet can notify multiple unreachable routes at the same time, which has nothing to do with the path attributes. B. The Update packet is to update the route. C. A packet can notify multiple routes at the same time, but their path attributes must be the same. D. A packet can notify multiple routes at the same time, and their path attributes can be different.


Two routers running OSPF are connected via a point-to-point link. During the two hours after the Link State Databases have been synchronized, (The peer state machine is in the full state.) if any changes happened to the network routing information, which kinds of packets are being transferred over the link? ( )

A. HELLO packet (Hello Packet) B. LSU packet (Link State Update Packet) C. DD packet (Database Description Packet) D. LSAck packet (Link State Acknowledgment Packet) E. LSR packet (Link State Request Packet)


When a route is imported to the RIP routing protocol, if no metric is specified, which of the following will be taken as the default? ( )

A. 15 B. 254 C. 255 D. 16



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Huawei GB0-280: Practice Exam In the OSPF protocol, the LSR packet is to ( )

A. To describe the local LSDB. B. To request LSA that does not exist locally to the opposite end, or the opposite end automatically updates LSA. C. To discover and maintain peers. D. To have the LSA at the opposite end updated E. To make the acknowledgement after receiving LSU F. To elect DR and BDR


For a given destination address, the router checks the routing table to see whether there is a matching item. Which of the following is the matching rule? ( )

A. Combine the destination address segment and the mask of a table item by AND, and then combine the mask with the given destination address by AND, last compare whether the two combinations are equal. B. Combine the destination address segment and the mask of a table item by AND, and then compare the combination with the other combination of the given destination address segment and the destination address by AND to see whether they are equivalent. C. Combine the destination address segment and the mask of a table item by OR, and then combine the mask with the given destination address by OR, last compare whether the two combinations are equal. D. Combine the destination address segment and the mask of a table item by OR, and then compare the combination with the other combination of the given destination address segment and the destination address by OR to see whether they are equivalent.


Which is the meaning of the aggregate 10.110.0.0 255.255.0.0 origin-policy MAP1 command? ( )

A. Advertise the aggregated route and some filtered specific routes. B. Advertise the specific route, not the aggregated route. C. Advertise only the aggregated route. D. Advertise the aggregated route and all specific routes contained in the aggregation.

Answer: A www.CertificationKing.com

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QUESTION NO: 30


BGP decides the routing policy according to the route attribute as follows: A Discard the route with next hop unreachable; B Choose the route with fewest ASs (AS-Path) on the way; C Choose the route with lowest origin; D Choose the route with the highest Local-Preference; E Choose the route that originates locally; Which of the following is the correct order if arranged from high priority to low priority? ( )

A. ADECB B. ADCBE C. ABCDE D. CDEAB E. ADEBC

Answer: E QUESTION NO: 31

Which of the following is right about BGP peers? ( )

A. When BGP gets the route from a peer, it does not always add the route to the IP routing table. B. BGP peers learn the same route information. C. None of the above D. BGP forwards the route from the peers to all other peers.


Which of the following are right about BGP confederation? ( )

A. EBGP is adopted between the sub-ASs, the confederation itself and the AS external. B. Such important information as the next hop, MED and Local-Preference will not lose when traversing the sub-AS. C. The confederation can easily detect the route loop in the AS. D. It partitions an AS into several sub-ASs. The IBGP peer in the sub-AS fully connects to each other, and meanwhile connects to other sub-ASs.




Because Local-Preference is not transmitted between the AS, it will not be transmitted between the sub-ASs in an federation. ( )

A. False B. True


For a given destination address, the router checks the routing table to see whether there is a matching item. Which of the following is the matching rule? ( )

A. Combine the destination address segment and the mask of a table item by OR, and then compare the combination with the other combination of the given destination address segment and the destination address by OR to see whether they are equivalent. B. Combine the destination address segment and the mask of a table item by OR, and then combine the mask with the given destination address by OR, last compare whether the two combinations are equal. C. Combine the destination address segment and the mask of a table item by AND, and then compare the combination with the other combination of the given destination address segment and the destination address by AND to see whether they are equivalent. D. Combine the destination address segment and the mask of a table item by AND, and then combine the mask with the given destination address by AND, last compare whether the two combinations are equal.


Which command will give you the OSPF area information? ( )

A. display ospf lsdb B. display ospf C. display ospf areas D. display ospf peer


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Which of the following are right about the ACL rule in the IPSEC? ( )

A. permit means to enable IPSEC on the defined data flow B. Data flow without definition will be transparently transmitted C. deny means to transparently transmit and disable the IPSEC on the defined data flow D. Data flow without definition will be discarded


In the OSPF protocol, the Database Description (DD) packet is ( )

A. To elect DR and BDR B. To make the acknowledgement after receiving LSU C. To request LSA that does not exist locally to the opposite end, or the opposite end automatically updates LSA. D. To describe the local LSDB. E. To discover and maintain peers. F. To have the LSA at the opposite end updated


Which of the following are right description on RADIUS? ( )

A. The model of Request/Response is adopted, and the request is originated by the client end. B. The transmission protocol between the client and the server is TCP. C. The password is encrypted with MD5 algorithm. D. The transmission protocol between the client and the server is UDP.



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Huawei GB0-280: Practice Exam Which are right about the relation between IPSec and IKE? ( )

A. IPSEC uses the security association established by IKE to perform IP packet encryption or authentication. B. IKE uses the encrypted Hash algorithm to ensure integrity and authenticity of the packet for IPSec. C. IKE negotiates and establishes a security association for IPSEC, and then transfers the specified parameter and encryption key to IPSEC. D. IKE is an application layer protocol over UDP, and a signaling protocol for IPSEC.


In the OSPF protocol, the LSU packet is to ( )

A. To make the acknowledgement after receiving LSU B. To describe the local LSDB. C. To request LSA that does not exist locally to the opposite end, or the opposite end automatically updates LSA. D. To discover and maintain peers. E. To elect DR and BDR F. To have the LSA at the opposite end updated

Answer: F QUESTION NO: 41

In the OSPF protocol, which of the following belong to the default NBMA network types ( )

A. Ethernet B. X.25 C. PPP D. Frame relay E. ATM

Answer: B,D,E QUESTION NO: 42

Which of the following will be used as filter only in the BGP? ( )


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A. access list(acl) B. ip-prefix C. aspath-list D. community-list E. route-policy

Answer: C,D QUESTION NO: 43



A. Extranet VPN B. Client initiated VPN C. Intranet VPN D. Access VPN


In Quidway series routers, to check the statistics and the specification for PQ over Ethernet 0, which of the following command you can use? ( )

A. [Quidway]display qos interface ethernet 0 pq B. [Quidway]display qos queueing priority C. [Quidway]display qos interface ethernet 0 D. [Quidway]display qos pq interface ethernet 0


The differences between the NBMA and the point-to-multipoint network are ( )

A. It is required to elect the DR and BDR in NBMA, but not required in point-to-multipoint. B. NBMA dispatches the protocol packet in unicast, therefore, it is necessary to specify the peers manually. Whereas the point-to-multipoint network is optional, it can dispatch the packet in unicast, and in multicast. C. The point-to-multipoint network is a default network type; whereas NBMA is not. D. In the OSPF protocol, NBMA refers to the fully connected Non-Broadcast Multicast network; while the point-to-multipoint network is not necessarily to be fully connected.




In what ways that the Differentiated Service varies from the Integrated Service? ( )

A. In the Differentiated Service, packets from different sources get different services. B. The Differentiated Service is fit for backbone network. C. The Differentiated Service does not require signaling protocol. D. The Differentiated Service does not have to maintain the soft-state for each flow as the integrated Service does. E. In the Differentiated Service, packets to different destinations get different services.

Answer: B,C,D QUESTION NO: 47

In the OSPF protocol, the Database Description (DD) packet is ( )

A. To describe the local LSDB. B. To have the LSA at the opposite end updated C. To discover and maintain peers. D. To elect DR and BDR E. To request LSA that does not exist locally to the opposite end, or the opposite end automatically updates LSA. F. To make the acknowledgement after receiving LSU


Which are right about the debugging commands? ( )

A. debug bgp packet B. debug bgp event C. debug bgp keepalive D. debug bgp update E. debug bgp open

Answer: A,B,C,E www.CertificationKing.com

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How many attributes can every RADIUS packet carry? ( )

A. Multiple B. 1 C. 2 D. 3


Which of the following are right about the ACL rule in the IPSEC? ( )

A. Data flow without definition will be transparently transmitted B. deny means to transparently transmit and disable the IPSEC on the defined data flow C. permit means to enable IPSEC on the defined data flow D. Data flow without definition will be discarded


Which of the following are right about AAA? ( )

A. AAA can control the access of user through packet features. B. AAA adopts centralized management over the data of user. C. AAA is to manage the access of the dispersed users. D. AAA can authenticate the identity of the user through the name and password.


Which of the following are right about BGP route dampening? ( )

A. The route under penalty will not be notified until it disappears from the routing table. B. When there is route flapping, the Update packet will be advertised repeatedly in the network. C. BGP route dampening is caused by the un-stability of the route. D. The penalty of route flapping becomes heavier with time going.


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Answer: B,C QUESTION NO: 53


Which of the following is the necessary configuration to enable a router running OSPF to advertise the route to other routers via the frame relay network? ( )

A. Use InARP B. Manually specify peers C. Specify the conversion from the IP address to the DLCI address with map D. Map the X.121 address



A. 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. B. Average Queue can balance the resource seizure. C. Because the queue length can not be calculated directly. D. The average length of the queue is related with the types of the supported services.


Two routers, RTA and RTB are connected to each other by a link via their serial 0. The link protocol is PPP, and the network type over the two interfaces is Point-to-Point. The interfaces and the link are all up. Specify the network segment as the following: [RTA] ospf enable [RTA-serial0] ip address 10.10.10.1 255.255.0.0 [RTA-serial0] ospf enable area 1 [RTB] ospf enable [RTB-serial0] ip address 10.10.10.2 255.255.255.0 [RTB-serial0] ospf enable area 1


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[RTA] display ospf peer Huawei GB0-280: Practice Exam

Which is the final state of the RTA peer state machine? ( )

A. TWO WAY B. DOWN C. ATTEMP D. FULL


Which of the following are the right description to the LSA propagation? ( )

A. Network Summary LSA (Type = 3) propagates only in the related areas, which are the area to which the ABR that produced the LSA belongs. B. Router LSA (Type = 1) propagates only in its native area. The foreign Router LSA from other areas will not appear in the native area; C. Network LSA (Type = 2) propagates only in the area defined in its content. Foreign Network LSAs will not appear in the native area. D. AS External LSA(Type = 5) propagates in the whole AS internal except the Stub area. E. ASBR Summary LSA(Type = 4) propagates in the whole AS internal except the Stub area.


Which of the following describe the function of the command ppp authentication [pap | chap] scheme default ? ( )

A. Apply the authentication schemes to the port. B. Enable PPP over the port. C. Define the authentication schemes for PPP users. D. Define the authentication method for PPP users.


Which of the following is right on the distance vector routing protocol? ( )


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Huawei GB0-280: Practice Exam A. BGP is a distance vector protocol, for its packet contains the number of the hops B. All distance vector protocols support Classless Inter-Domain Routing (CIDR) C. What the link state protocol exchanges is the link state; while what the distance vector protocol exchange are the reachable information of the destination prefix and some related vectors.


According to the encapsulation to the packet, IPSEC falls into ( )

A. Fast mode B. Transmission mode C. Tunnel mode D. Primary mode


Which is wrong about the BGP protocol? ( )

A. BGP is to check the route loop. B. BGP is a robust routing protocol. C. BGP inherits from EGP D. BGP can not summary routes of the same type.


Which of the following are right about BGP route aggregation? ( )

A. You can change the AS path during route aggregation. B. Route aggregation is to summarize routes in segments to one or more than one aggregations, hence reduce the routing items in the routing table to a minimum. C. By default, BGP can also aggregate the local routes. D. BGP route aggregation can notify only the aggregated route. E. BGP supports only automatic route aggregation.

Answer: A,B,D www.CertificationKing.com

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QUESTION NO: 62


Which of the following can enable AAA on Quidway routers? ( )

A. aaa enable-mode B. enable aaa C. By default, AAA has been enabled. D. aaa-enable


Which of the following are right description to the configuration of OSPF over an interface? ( )

A. When the link layer protocol is Frame Relay, X.25 or ATM, OSPF takes the network as Point-to- Multipoint by default. B. When the link layer protocol is Ethernet, OSPF takes the network as Broadcast by default. C. No link layer protocol will be regarded as Point-to-Multipoint by default. If the NBMA network is not full-meshed, you should change the network type to Point-to-Multipoint manually. D. When the link layer protocol is PPP, OSPF takes the network as Point-to-Point by default.


If a regular expression is ^70+$, then the matched AS-Path will be: ( )

A. 70 B. 701 C. 7000 D. 700


If a regular expression is ^70+$, then the matched AS-Path will be: ( )


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A. 7000 B. 701 C. 70 D. 700



Which command will give you the OSPF area information? ( )

A. display ospf lsdb B. display ospf C. display ospf peer D. display ospf areas


Which of the following equipments is necessary in constructing VPDN with L2TP? ( )

A. LAC B. RADIUS Server C. Tunnel D. LNS

Answer: A,D QUESTION NO: 68

When RADIUS is used to do accounting , the possible information may include ( )

A. Input packets B. Output packets C. Input/Output bytes D. Session duration

Answer: A,B,C,D


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Which of the following are right about BGP route aggregation? ( )

A. BGP supports only automatic route aggregation. B. BGP route aggregation can notify only the aggregated route. C. Route aggregation is to summarize routes in segments to one or more than one aggregations, hence reduce the routing items in the routing table to a minimum. D. You can change the AS path during route aggregation. E. By default, BGP can also aggregate the local routes.


Which of the following are right about WRED? ( )

A. If the length of the queue is smaller than the lower threshold, do not drop out the packet. B. The average length of the queue is adopted when comparing the queue length to the lower and upper thresholds during packet dropping. C. If the length of the queue is greater than the upper bound, drop all newly arrived packets. D. When the length of the queue is between the upper threshold and the lower threshold, WRED begins to drop out the packet at random. The longer the queue is, the higher the drop-out probability is.


The queue policy and congestion avoidance policy for Best-Effort are: ( )

A. FIFO and Tail-Drop B. PQ and Tail-Drop C. FIFO and RED D. PQ and RED


The three sources of BGP routes are ( ) www.CertificationKing.com

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Huawei GB0-280: Practice Exam A. Import the static route to the BGP routing table B. Import the route learned from the IBGP to the BGP routing table C. Import the route learned from the EBGP to the BGP routing table D. Semi-dynamically import the route discovered by the IGP into the BGP routing table through the Network command E. Dynamically import the route discovered by the IGP into the BGP routing table through the import-route command

Answer: A,D,E QUESTION NO: 73


A. The GRE tunnel can be built over the L2TP tunnel. B. The L2TP tunnel can be built over the GRE tunnel. C. The L2TP tunnel can not be built over the GRE tunnel. D. The GRE tunnel can not be built over the L2TP tunnel.

Answer: A,B QUESTION NO: 74

Which of the following are right about the AH protocol in IPSec? ( )

A. It provides authentication to the data source to guarantee the authenticity of the packet sender. B. Under transmission mode, the AH protocol authenticates the data in the IP packet, and the invariant part of the IP header. C. Under the tunnel mode, the AH protocol authenticates the entire internal of the IP packet, and the invariant part of the IP header. D. It adopts an encrypted Hash algorithm to calculate the summary of the protected data. In this way, it prevents the packet from being tampered by the hacker, hence ensures the integrity of the packet. E. In conjunction with anti-replay window and packet authentication, the AH protocol adopts 32 bits sequence number to prevent and defend replay attacks.

Answer: A,B,C,D,E QUESTION NO: 75

Which of the following are the right description to the DR and BDR in the OSPF protocol? ( ) www.CertificationKing.com

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Huawei GB0-280: Practice Exam A. DR and BDR establish adjacency with all routers running OSPF in the network segment. But no adjacency is established between the DR and BDR. B. In the broadcast network, if there is no DR, the protocol can not operate normally. However, if there is no BDR, the protocol can still operate normally. C. DR will produce the Network LSA (Type = 2) for the current network segment, but BDR will not. D. In the broadcast network, even there is only one router, it is still necessary to elect the DR.


The basic function of AAA includes ( )

A. Access control list B. Accounting C. Allow authorized user to have access to the resource D. Authentication


Which of the following are right about BGP confederation? ( )

A. It partitions an AS into several sub-ASs. The IBGP peer in the sub-AS fully connects to each other, and meanwhile connects to other sub-ASs. B. Such important information as the next hop, MED and Local-Preference will not lose when traversing the sub-AS. C. The confederation can easily detect the route loop in the AS. D. EBGP is adopted between the sub-ASs, the confederation itself and the AS external.



A. RADIUS Server B. LAC C. LNS D. Tunnel


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What are the preparations before you make IKE configuration? ( )

A. Decide the authentication algorithm during the IKE exchange. B. Decide the encryption algorithm during the IKE exchange. C. Decide the identity authentication mechanism for the exchange parties. D. Decide the DH algorithm during the IKE exchange.


In the OSPF protocol, the LSU packet is to ( )

A. To discover and maintain peers. B. To request LSA that does not exist locally to the opposite end, or the opposite end automatically updates LSA. C. To make the acknowledgement after receiving LSU D. To elect DR and BDR E. To describe the local LSDB. F. To have the LSA at the opposite end updated

Answer: F QUESTION NO: 81

Which of the following is right about BGP peers? ( )

A. When BGP gets the route from a peer, it does not always add the route to the IP routing table. B. BGP peers learn the same route information. C. BGP forwards the route from the peers to all other peers. D. None of the above



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Huawei GB0-280: Practice Exam Which of the following are right about the route-policy?

A. Parts with different seq-numbers relate to each other in AND, that is, the route matches with each part in order. Passing all the nodes in the route-policy means passing the whole route-map. B. A route-policy consists of multiple nodes. Every node is a test unit. seq-number is used to order the test between the nodes. C. Parts with different seq-numbers relate to each other in OR, that is, the route matches with each part in order. Passing one part of the route-policy means passing the whole route-map. D. Every node is made up of a group of if-match and apply clauses. if-match clause defines the matching rule, that is, the requirement for the current route-map to pass the filter. The matched object is the attribute of the route. apply clause defines the action to be taken when the route meets the requirement in the if-match clause. The action is a set of configure commands to set the attribute of the route.


Which of the following are right description to the IPSec(IP Security)? ( )

A. IPSec is tunnel compression standard. B. It provides security for sensitive data transmission over networks that do not offer protection mechanism as the Internet. C. It defines the IP packet format and some other infrastructures to provide end-to-end, anti-replay and an optional encipherment. It also provides enhanced authentication and integrity. D. Framed by IETF, IPSec is a frame protocol to protect data transmission over the Internet.



A. The L2TP tunnel can be built over the GRE tunnel. B. The GRE tunnel can be built over the L2TP tunnel. C. The GRE tunnel can not be built over the L2TP tunnel. D. The L2TP tunnel can not be built over the GRE tunnel.

Answer: A,B www.CertificationKing.com

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What are the preparations before you make IKE configuration? ( )

A. Decide the DH algorithm during the IKE exchange. B. Decide the identity authentication mechanism for the exchange parties. C. Decide the authentication algorithm during the IKE exchange. D. Decide the encryption algorithm during the IKE exchange.


Which of the following are the meaning of the command radius timer response-timeout 5 ? ( )

A. If no response from the RADIUS server is received in 5 seconds, re-send the authentication request. B. If no response from the RADIUS server is received in 5 minutes, re-send the authentication request. C. If no response from the RADIUS server is received in 5 minutes, re-send the accounting request. D. If no response from the RADIUS server is received in 5 seconds, re-send the accounting request.



A. Average Queue can balance the resource seizure. B. 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. C. Because the queue length can not be calculated directly. D. The average length of the queue is related with the types of the supported services.



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Huawei GB0-280: Practice Exam Which of the following are right about BGP router advertising the route?( )

A. BGP discovers and advertises the route. B. BGP does not forward the route discovered by other protocols except that the route has been imported to the BGP routing table. C. Once BGP establishes connection with peers, it will advertise all activated BGP routes to peers. At the later time it only needs to send the increment route to the peer. D. When there are multiple paths, BGP choose the best route to use and to publish.


According to the OSPF protocol, the Router ID must be unique in the AS internal. Because the Router LSA only performs intra-area propagation, even there are two intra-area routers, belonging to two different areas though, with the same Router ID, it will result in no calculating errors. ( )

A. True B. False


The basic function of AAA includes ( )

A. Allow authorized user to have access to the resource B. Authentication C. Accounting D. Access control list


Which of the following are the right description to the DR and BDR in the OSPF protocol? ( )

A. DR will produce the Network LSA (Type = 2) for the current network segment, but BDR will not. B. In the broadcast network, if there is no DR, the protocol can not operate normally. However, if there is no BDR, the protocol can still operate normally. C. In the broadcast network, even there is only one router, it is still necessary to elect the DR.


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Huawei GB0-280: Practice Exam D. DR and BDR establish adjacency with all routers running OSPF in the network segment. But no adjacency is established between the DR and BDR.


Which of the following are BGP packets? ( )

A. HELLO packet B. REFLASH packet C. OPEN packet D. UPDATE packet E. KEEPALIVE packet F. NOTIFICATION packet

Answer: C,D,E,F QUESTION NO: 93

In the OSPF protocol, the LSR packet is to ( )

A. To make the acknowledgement after receiving LSU B. To request LSA that does not exist locally to the opposite end, or the opposite end automatically updates LSA. C. To elect DR and BDR D. To discover and maintain peers. E. To have the LSA at the opposite end updated F. To describe the local LSDB.


which of the following are among the function of WRED? ( )

A. Set the maximum probability for packet dropping B. Avoid TCP global synchronization C. Set the min-threshold and max-threshold for packet dropping. D. Manage the congestion


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Which are right about the reflect cluster-id 10 command? ( )

A. You can use this command to solve the problem that there are too many connections in the IBGP fully-closed network. B. You should use this command together with the neighbour command. C. None of the above D. You can use this command to define a BGP association.

Answer: A,B QUESTION NO: 96

Which of the following are the configuration method taken for the IPSEC security policy? ( )

A. Configure manually. B. Take advantage of L2TP self-negotiation C. Take advantage of GRE self-negotiation D. Take advantage of IKE negotiation.



A. RADIUS Server B. LNS C. Tunnel D. LAC

Answer: B,D QUESTION NO: 98

Quidway series routers adopt the Radius server for accounting. Which of the following is the default accounting port number? ( )


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A. 1813 B. 1812 C. 1643 D. 1642



Which of the following is the necessary configuration to enable a router running OSPF to advertise the route to other routers via the frame relay network? ( )

A. Map the X.121 address B. Manually specify peers C. Use InARP D. Specify the conversion from the IP address to the DLCI address with map


Enable Custom Queue over Ethernet 0, and apply Group 10 in the Custom Queue to the interface. Which of the following command should be used? ( )

A. [Quidway-Ethernet0] access-group 10 B. [Quidway-Ethernet0] qos cql 10 C. [Quidway-Ethernet0] acl 10 D. [Quidway-Ethernet0] qos cq cql 10


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. ( )

A. False B. True


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Which of the following are right about the UPDATE message? ( )

A. The UPDATE message is maximally 4096 bytes in size. B. The UPDATE message can send several reachable routes with different attributes. C. The UPDATE message materializes the support of BGP to CIDR. D. UPDATE contains the version information of the opposite peer. E. The UPDATE message contains several reachable and unreachable routes, and the related attribute fields.

Answer: A,C QUESTION NO: 103


A. Access VPN B. Extranet VPN C. Intranet VPN D. Client initiated VPN


Which command listed below can achieve the following requirement: CAR rule 1 is specified to

match the packet with precedence 1, 3 or 5.

A. [Quidway]qos carl 1 rate-limit 42 B. [Quidway]qos carl 1 precedence 42 C. [Quidway]qos carl 1 mac 1 3 5 D. [Quidway]qos carl 1 rate-limit 1 3 5 E. [Quidway]qos carl 1 precedence 1 3 5

Answer: E QUESTION NO: 105


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Huawei GB0-280: Practice Exam 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: 0, AS_PATH: 100 200, Origine: EGP, next_hop: 88.8.8.1/16 B. Local preference: null, MED: 100, AS_PATH: 200 100 ,Origine :EGP, next_hop: 10.110.20.1/16 C. Local preference:100, MED: 100, AS_PATH: 200 ,Origine: EGP, next_hop: 88.8.8.1/16 D. Local preference:100, MED: null, AS_PATH: EGP, Origine :EGP, next_hop: 10.110.10.1/16


In the OSPF protocol, which of the following belong to the default NBMA network types ( )

A. Ethernet B. X.25 C. ATM D. Frame relay E. PPP


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