EMT Practice Test

1. Question Content...

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Question1: EGP authentication can prevent illegal routers from establishing neighbors with BCP routers. BCP authentication can be divided into MD5 authentication and Keychain authentication. Which of the following BGP messages will carry BCGP Keychain authentication information? ((Multiple choice)

Question2: In the multi-level RR scenario, a large number of secondary RRs will be connected to the primary RR, which may lead to BGP of the primary RR. The routing table overflows, what method can be used to reduce the risk of overflowing the routing table of the advanced RR BGP?

Question3: The network administrator A wants to use the IP Prefix List to match specific routing entries. Which of the following routes will be matched by the IP Prefix List? (Multiple choice)

Question4: The description of the MPLS forwarding mechanism is correct

Question5: What is the meaning of display current-configuration I include vlan command?

Question6: Which of the following statements about 1S-IS (IPv6) is true?

Question7: Which of the following descriptions is correct about configuring static LSP in MPLS network? (Multiple choice)

Question8: Compared with the OSPFv2 packet header, which fields are added in the OSPFv3 packet header?

Question9: The cutover risk assessment mainly considers which of the following aspects?

Question10: Network administrator A wants to use ACL to match specific routing entries. Which of the following routing entries will be matched by the ACL rules in the figure? (Multiple choice) acl number 2000 rule 10 permit source 10.0.0.0 0.0.6.0

Question11: Regarding multi-instance CE (Mlulti-VPN-Instance CE, MCE), which of the following descriptions is wrong?

Question12: When a fault occurs, the fault can be classified to reduce the scope of fault location. Which of the following is not an interface configuration fault?

Question13: According to this figure, it can be known that in VLAN 300, from 17:22:38 to 17:22.44,00e0-fc3d-3bdB. 0 MA, C flaps occurred on 2020-06-04.

Question14: The Router ID of OSPFv3 needs to be configured in dotted decimal notation with a length of 128bits.

Question15: An enterprise purchased the leased lines of two operators. In order to optimize the route, the enterprise used the 6GP protocol to learn routing entries of the two operators. However, the company found that after such a configuration, the traffic of the export routing increased greatly. After the network engineering investigation, it was found that the traffic of the two operators was passed to each other through the company's export router.


Therefore, the company intends to use routing strategies to prevent the traffic between different operators from passing each other. Is the configuration in the figure correct?

Question16: (Drag and drop) Network administrator A needs to permit or deny some specific routes, but administrator A is not proficient in configuration. Please help administrator A to sort the configuration reasonably so that the device can permit or deny specific routes according to the requirements in the figure.

Question17: In BGP/MPLS IP VPN, the OSPF multi-instance process uses the DN bit to prevent Type5 LSA loops.

Question18: Which of the following are advantages of VLAN aggregation?

Question19: What types of Link Types are included in the Router LSA in OSPF? (Multiple choice)

Question20: As shown in the figure, all routers run OSPF, because R3 is in the backbone area, so in the LSDB of R3 There are no three types of LSAO

Question21: The configuration shown in the figure is performed on R2 to filter all received routes. Assuming that there is a BGP route with the AS_Path attribute of [100 200 300 400] on R1 that needs to be sent to R2, please help the network administrator to adjust the order of AS in the AS_Path attribute of the route on R1 to ensure that the routing entries will not be filtered by the routing policy of R2. (Sorting questions)

Question22: Through the display ip interface GE0/D/D command, you can view the statistics of ping packets received on this interface.

Question23: The IS-IS neighbor between R3 and R1 is not established. According to the information in this figure, what is the possible cause?

Question24: As shown in the figure, Site1 and Site2 need to achieve mutual access through the operator's BGP/MPLS IPVPN. It is known that the public network tunnel between PE1 and PE2 has been established (the label information is shown in the figure), and PF1 has advertised the 192.168.1.0/24 network segment route in Site1 to PE2 through the MP.JIBGP neighbor relationship, and the route learning is normal.

When capturing the data that Site2 visits the 192.168.1.0/24 of Site1 between P and PE1, what should be the outermost label?

Question25: LDP messages are exchanged between LSRs running the LDP protocol. LDP messages can be divided into four types according to their functions. Which of the following is not a message type of LDP?

Question26: An engineer used two routers to test IPv6 services, and simulated the interconnection between headquarters and branches by running BGP4+.

The logical topology of the network is shown in the figure. Regarding the transmission of IPv6 routes between two devices, which of the following statements is wrong?

Question27: Which of the following is wrong about DHCP Snooping?

Question28: There is a concept of forwarding equivalence class (FEC-Fowarding Equivalence Class) in MPLS, so FEC does not Can the allocation be made based on which of the following criteria?

Question29: The following description of TL in PLSHeader is correct:

Question30: After executing reset isis all, the IS-Is protocol process needs to be restarted and neighbors need to be re-established, and various IS-IS statistics will not be cleared.

Question31: Which of the following operations may affect the normal operation of the customer network? (Multiple choice)

Question32: By executing the () command, users on different ports of the same VLAN can be completely isolated at Layer 2 and Layer 3 and cannot communicate. (Please use English lowercase letters to complete the command, and the command cannot be abbreviated)

Question33: The Discovery message of LDP is used for neighbor discovery, and LDP has different discovery mechanisms when discovering neighbors. Then, which of the following statements about Discovery message in the basic discovery mechanism is correct? (Multiple choice)

Question34: Since BGP is an EGP routing protocol, BGP routing policies can only be deployed between EBGP neighbors.
The routing policy deployed between IBGP neighbors is invalid.

Question35: If you want to check the files under Flash, which command should you use?

Question36: As shown in the figure, network administrator A on the R1 router, after modifying the Local Preference value of the routing entry sent to R2 through the routing policy, can control the path of traffic leaving AS100.

Question37: (Connection question) Please match the command with the realized function.

Question38: Which of the following are the advantages of VLAN aggregation? (Multiple choice)

Question39: To prevent hackers from attacking user devices or networks through MA, C addresses, you can configure the MA, C addresses of untrusted users as black hole MA, C addresses to filter out illegal MA, C addresses.

Question40: When deploying BGPIMPLS IPVPN, when two VPNs have a common site, the common site must not use overlapping address spaces with other sites of the two VPNs.

Question41: What is the most efficient way to view device alarms through the CLI?

Question42: Please sort by the cutover execution steps.

Question43: When a fault occurs, the fault can be classified to reduce the scope of fault location. Which of the following is not an interface configuration fault?

Question44: Which description is correct about the MPLS forwarding mechanism? (Multiple choice)

Question45: Which of the following statements about IPSG is false?

Question46: From this picture, we can judge
<Redisplay ipv6 routing table protocolTuozhen
Public Routing Table . ISIS
Summary Count 6
ISIS Routing Table's Status : < Active >
Summary Count 6

Question47: Which of the following are static information coke analysis?

Question48: IS-IS is a link-state routing protocol that uses the SPF algorithm for route calculation. As shown in the figure, a campus deploys both IPv4 and IPv6 and runs IS-IS to achieve network interconnection. R2 only supports IPv4. Which of the following statements is true about the topology calculation of this network?

Question49: What is the command to adjust the link cost of an IS-IS interface?

Question50: After a fault occurs, you need to collect and back up various types of fault information in time as a reference for troubleshooting. In addition, when seeking emergency assistance from Huawei Technologies Co., Ltd.

Question51: Regarding the label space of MPLS, which of the description is wrong?

Question52: According to the configuration shown in the figure below, you can know that R4 has an interface advertised into IS-IS?

Question53: When OSPFv2 evolves to OSPFv3, the format and function of LSA are exactly the same, except that the network layer address in LSA changes from IPv4 to IPv6.

Question54: Regarding MP-BGP, which of the following descriptions is wrong?

Question55: Regarding BGP/MPLS IPVPN data forwarding, which of the following description is wrong?

Question56: Senior engineers with rich experience can quickly solve faults only by relying on experience, and the efficiency is very high.

Question57: As shown in the figure, MPLS/BGP IPVPN is deployed on the network.
The MP-BGP neighbor relationship is established between PE1 and PE2 through the LoopbackD interface.
After the configuration is complete, it is found that CE1 and CE2 cannot learn routes from each other.
Run the command to check the error on PE2.
The neighbor information is shown in the figure, what is the most likely cause of the problem?

Question58: Run the display ip interface GEO/D/D command to view statistics about ping packets received on the interface.

Question59: According to this figure, which of the following is the correct description of the IPv6 routing information calculated by the R4 router through IS-IS?

Question60: (Drag and drop) As shown in the figure, there is a message containing three-layer label headers. Please select the corresponding values of the X, Y, and Z fields in the figure. (Decimal)

Question61: According to this picture, what can we judge? (Multiple choice)

Question62: According to this picture, what can we judge? (Multiple choice)

Question63: MPLS has the concept of FEC-Forwarding Equivalence Class, so on which of the following standards cannot FEC be allocated based?

Question64: OSPF is deployed in a small and medium-sized network. When checking the routing table of a certain device, it is found that there are only direct routes. Which operation is unlikely to cause the fault?

Question65: In the process of viewing the debug output through the SSH terminal, a lot of information pops up. Which of the following operations can Make the Moni tor terminal no longer pop up debug messages?

Question66: The routing attributes of the three routing entries are shown in the figure. Assuming that the next hops of the three routing entries are all reachable, when these three routing entries are After the entries arrive at the BP router in order, by default, BGP will finally call a route entry?

Question67: After the cutover acceptance is completeD. what work still needs to be performed in the closing stage?

Question68: In an MPLS VPN network, data packets are forwarded when they enter the public network. Will be encapsulated with two layers of MPLS labels. Which of the following description is correct about the processing of the data packet? (Multiple choice)

Question69: What is the default aging time of the MA, C address table of Huawei switches?

Question70: Which of the following regarding the configuration description is wrong?

Question71: About the site in the BGPIMPLS IP VPN network architecture. Which of the following descriptions is correct?

Question72: The routing attributes of the three routing entries are shown in the figure. Assuming that the next hop of the three routing entries are all reachable, when the three routing entries arrive at the BP router in sequence, by default, BGP will finally select one route entry?

Question73: The OSPF protocol runs between CE and PE, when CE1 advertises the route of the site to CE2. Which of the following description is wrong?

Question74: Basic QinQ can choose the outer tag encapsulation method according to the business type.

Question75: OSPF is deployed in a campus to achieve network interworking, and OSPF is also enabled on the GEO/0/2 interface of R3. Area1 is deployed as an NSSA area, and the device addresses are shown in the figure. An engineer configures a static route on R3 to access the loopback interface address of R4, and imports the static route in the 0SPF process. At this point, in the Type5 LSA received by R1, the forwarding address (FA) is____. (Note: Please fill in the IP address without mask)

Question76: BFDLink state detection at the heart (millisecond) level can be achieved.

Question77: As shown in the figure, OSPF is deployed in a campus, and Area 1 is deployed as an NSSA area. By default, R2 will automatically generate a Type 7 LSA default route and flood it in the NSSA area.

Question78: An engineer uses two routers to test IPv6 services, and simulates the interconnection between the headquarters and branches by running BGP4+. As shown in the figure, an engineer captures the packet to view the update message sent by R1.


Regarding the description of the message information, which of the following statements is correct?

Question79: In addition to the virtual link, what type of IPv6 address is the source IPv6 address of the He11o packet of OSPFv3?

Question80: Regarding the difference between NSR and NSF, which one is correct?

Question81: According to this picture, you can judge

Question82: Which of the following description of the configuration on this switch is correct? (Multiple choice)

Question83: According to this picture, what can we judge? (Multiple choice)

Question84: Which of the following functions will affect the establishment of BGP neighbors? (Multiple choice)

Question85: The rollback operation of the project cutover can be determined temporarily according to the situation during the cutover, and no advance planning is required.

Question86: Which of the following are not included in the security protection actions that a secure MAC address can perform?

Question87: Regarding BGP/MPLS IPVPN routing interaction, which of the following descriptions is wrong?

Question88: About the difference between NSR and NSF, which is correct?

Question89: In an operator's MPLSVPN network, there are two devices, PE1 and PE2, for MPLSVPN data forwarding. PE1 receives a 172.16.1.0/24 private network route from the client, and transforms it into a VPNv4 route on PE1 and assigns labels. Released to PE2 as 1027. The outgoing label of the MPLSLSR-ID from PE2 to PE1 is 1025.
When the client on PE2 accesses 172.16.1.0/24, the inner and outer labels of the frame sent by PE2 should be the combination of the following options?

Question90: Traditional BGP4 can only manage IPv4 unicast routing information. In order to provide support for multiple network layer protocols, MP-BGP extends BGP-4.
MP-BGP uses address families to distinguish different network layer protocols. Which of the following address families are currently supported? (Multiple choice)

Question91: From the user's point of view, any phenomenon that affects the business can be defined as a fault.

Question92: ping -a X-c Y-s z -vpn-instance M 10.5.16.2, what is the meaning of this command? (Multiple choice)

Question93: For the same MA, C address, manually configured MA, C entries have higher priority than automatically generated entries.

Question94: From this figure, we can conclude that

Question95: In the VLAN aggregation technology, multiple Sub-VLANs are used to isolate the wide recruitment area, and these Sub-VLANs are aggregated into a logical Super-VLAN. A company divides different departments into different Sub-VLANs because of the Sub-VLAN. VLAN not only includes physical connections, but also can establish a three-layer VLANIF interface, which can directly communicate with the external network on the three-layer.

Question96: As shown in the figure, Client1 and Client2 act as clients of RR1 and RR2 at the same time, and RR1 and RR2 are in the same In a Cluster, R introduces 10 routes. It is assumed that the configuration of B, CP is correct. Neighbor relations have been established Now, how many routing entries exist in the BGP routing table of Client2?

Question97: By default, LDP adjacencies will trigger the establishment of LSP based on the IP routing of the 32bit address.

Question98: For the same MAC address, the priority of the manually configured MAC entry is higher than the automatically generated entry.

Question99: 0SPFV2 is an IGP running on an IPv4 network; 0SPFvV3 is an ICPO running on an IPv6 network the packet types of OSPFV3 and OSPFV2 are the same, including .Hall. message, DD message, LSU message, LSU packets and SAck packets. Which of the following statements is correct about 0SPFV3 packets?

Question100: According to this picture, we can judge:

Question101: In OSPFv3, an LSA whose propagation range is one area has_____kind. (Fill in Arabic numerals only)

Question102: As shown, all routers run OSPF. Which of the following statements is correct?

Question103: There is the concept of forwarding equivalent FEC in MPLS. Which of the following descriptions is wrong? (Multiple choice)

Question104: A router runs OSPF, and the output information is shown in the figure. Which of the following statements is correct?

Question105: When deploying MPLS/BGP IP VPN, which of the following descriptions is wrong about using BGP to exchange routing information between PEs and CEs?

Question106: Which of the following information can the DHCP binding table contain? (Multiple choice)

Question107: As shown in the figure, on the R1 router, network administrator A sends the routing entry to R2 through the routing policy After modifying the Local Preference value, you can control the path of traffic leaving the AS100

Question108: A network engineer outputs the following information when troubleshooting OSPF. Based on this, determine which reason causes the adjacency relationship to fail to be established normally?

Question109: As shown in the figure, OSPF is enabled on all interfaces of the router. Which of the following statements is correct?

Question110: Regarding the description of the label encapsulation format in MPLS, which one is correct? (Multiple choice)

Question111: As shown in the figure, R1, R2, R3, and R4 are in the same MPLS domain, and LDP is used to allocate MPLS labels between devices. R4 is the FEC Egress LSR of 4.4.4.0/24. If you want to realize that when R1 accesses 4.4.4.0/24, R4 does not need to query the label table but can understand the forwarding priority of the data, then R3's outgoing label for the FEC should be (). (Please fill in the Arabic numerals directly, without symbols)

Question112: MPLS is called multi-protocol label switching. Regarding the label description in MPLS, which of the following is correct? (Multiple choice)

Question113: Part of the configuration of R1 is as follows. Which statement about OSPF on R1 is correct?

Question114: Part of the configuration of R1 is as follows. Which statement about IS-IS on R1 is correct?

3vpn-instarwce rr
level- 2
cost-style wide
-erntity 47.ccOa 3eft)btxlci-dael

Question115: In OSPF, the A, BR will convert all type 7 L SAs in the NSSA area to type 5 L SAs.

Question116: According to this picture, the door can be judged?

Question117: Which of the following descriptions is wrong?

Question118: As shown in the figure, all interfaces of the router enable OSPF. The ip address identified in the figure is the IP address of the device's Loopback 0 port. R1, R2, R3EJLoopbacD are advertised in area 1, and Loopbacfk D of R4 is advertised in area D, the Loopback D of R5 is advertised in area 2. Which of the following addresses can ping each other?

Question119: The Discovery message of LDP is used for neighbor discovery, and LDP has different discovery mechanisms when discovering neighbors. The following statement about the Discovery message in the basic discovery mechanism is correct

Question120: During the process of viewing the debug output through the SSH terminal, a lot of information pops up. Which of the following operations can make the Monitor terminal no longer pop up the debug message? (Multiple choice)

Question121: As shown below: