EMT Practice Test

1. Question Content...

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Question1: ping -a X-c Y-s z -vpn-instance M 10.5.16.2, what is the meaning of this command is? (Multiple choice)

Question2: 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?

Question3: What types of Link Types are included in the Router LSA in OSPF? (Multiple choice)

Question4: R1 executes the operation ping -a 10.1.1.1 10.5.16.2, what does this command mean?

Question5: Regarding multi-instance CE (Mlulti-VPN-Instance CE, MCE), which of the following description is wrong?

Question6: Regarding the site in the BGPIMPLS IP VPN network architecture. Which of the following descriptions is correct?

Question7: By default, the Domain ID of each OSPF process running on the router is the same as the process number of the process, which can be modified by the domain-id command under the process

Question8: In OSPFv3, the LSA whose propagation range is an area has () types. (Fill in Arabic teaching characters only)

Question9: Qing technology is a technology that expands the VLAN space. It achieves the function of expanding the VLAN space by adding a layer of 8D2.1Q Tag on the basis of the 8Q2.12 tag message.
Which of the following statements about qinq is wrong?

Question10: A router is running OSPF, and the output information is as shown in the figure. Which of the following statements is correct?

Question11: MPLS has the concept of FEC-Forwarding Equivalence Class, so on which of the following standards cannot FEC be allocated based?

Question12: When deploying BCPIMPLS TP VPN, the OSPF VPN route tag (VPN Route Tag) is not transmitted in the MP-BGP extended community attributes. It only makes sense on PE routers that receive MP-BGP routes and generate OSPF LSA.

Question13: What is the purpose of configuring LSP fragmentation for IS-IS equipment?

Question14: Which of the following series can be matched by the regular expression 100.S? (Multiple choice)

Question15: Which packets can Huawei equipment perform traffic suppression for? (Multiple choice)

Question16: 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

Question17: By default, which of the following secure MAC address types will be lost after the device restarts?

Question18: What check items can be set in IPSG? (Multiple choice)

Question19: BFD session down will cause the direct link to fail.

Question20: Which description is correct about the MPLS forwarding mechanism? (Multiple choice)

Question21: How to view log information? (Multiple choice)

Question22: When configuring the DHCP Relay function on the device, the VLANIF interface of the relay connected to the client must be bound to the DHCP server group, and the bound DHCP server group must be configured with the proxy DHCP server IP address.

Question23: In an MPLS domain, LSR can be divided into Ingress LSR, Transit LSR and Egress LSR according to the way the LSR processes data. For the same FEC, a certain LSR can be the Ingress LSR of the FEC or the Transit LSR of the FEC.

Question24: Which of the following statements about LDP label retention-free way is correct? (Multiple choice)

Question25: IS-IS supports multi-instance and multi-process, that is, on an IS-IS router. You can configure multiple VPN instances to be associated with multiple IS-IS processes.
Which of the following descriptions about IS-IS multi-instance and multi-process are correct? (Multiple choice)

Question26: 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 descriptions are correct about the processing of the data packet? (Multiple choice)

Question27: What are the work that needs to be performed in the closing phase after the cutover acceptance is completed? (Multiple choice)

Question28: Network administrator A wants to check the neighbor status of BGP router R2. R2's BGP neighbor status information is shown in the figure. Please help network administrator A to obtain the following information: The AS where R2 is located is AS (). (Note: Only write numbers, do not add punctuation or spaces)

Question29: 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)

Question30: According to the configuration shown in the figure below, you can know that how many interfaces of R4 are advertised into IS-IS?

Question31: If the temperature of the device is found to be too high, it can be concluded that the fan has failed

Question32: As shown in the figure, PE1 and PE2 and their respective CEs exchange private network routing information through OSPF, and the same DomainID is configured on PE1 and PE2. When routes are imported from BGP to OSPF on PE2, which of the following types of SA may be delivered to CE2? (Multiple choice)

Question33: Display interface GE0/0/0 once, and find that the Total Eror count (the total number of error packets on the physical layer of the interface) is not 0. At this point, it can be concluded that the current fault has not disappeared.

Question34: (Connection question) Please match the command with the realized function.

Question35: To ensure security, authentication can be configured in the OSPFv3 process area view.

Question36: As shown in the figure, all interfaces of the router enable OSPF, among which R4 and R5 can establish OSPF virtual connections.

Question37: In order to speed up the perception of link failures in the IS-IS network, IS-IS can be linked with BFD.

Question38: (Connection question) Please correspond the alarm level with the importance of the fault and the countermeasures. (Multiple choice)

Question39: In order to prevent hackers from attacking user equipment or network through MAC address, the MAC address of untrusted users can be configured as black hole MAC address to filter out illegal MAC

Question40: Which of the following Community attributes can ensure that the propagation range of BGP routing entries is only within the AS? (Multiple choice)

Question41: What is the flooding scope in OSPFv3 for the LSA in the entire autonomous system?

Question42: Which of the following is not part of the preliminary preparations for the cutover plan?

Question43: IS-IS is a link state routing protocol that uses the SPF algorithm for routing calculations. A park has deployed IPv4 and IPv6 at the same time and runs IS-IS to achieve network interconnection. As shown in the figure, the network IPv4 and IPv6 have the same overhead, and R1 and R4 only support IPv4. By default, in the calculated IPv6 shortest path tree, the next hop device for R2 to access R6 is () (Note: The device name must be consistent with the figure, such as: R1)

Question44: In OSPF, ABR will convert all Type 7 LSAs in the NSSA area into Type 5 LSAs.

Question45: As shown in the figure, a certain park has deployed IPv6 for service testing, and there are 4 routers in the network. Run OSPFv3 to realize network interconnection.

Regarding the LSA generated by the OSPFv3 network, which of the following statements is wrong?

Question46: As shown in the figure:

Question47: Which of the following descriptions is correct about configuring static LSP in MPLS network? (Multiple choice)

Question48: 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?

Question49: . OSPFv2 is an IGP running on an IIPv4 network. OSPFV3 is an IGP running on an IPv6 network. Compared with OSPFv2, OSFv3 has similar LSA, but the function is slightly different. The following is the description of the LSA function of OSPFv3. Please drag the LSA to the correct LSA function column.

Question50: As shown in the figure, the entire network of a certain company uses OSPF to get through the network. However, RouterS and RouterE cannot establish an OSPF neighbor relationship. When detecting OSPF failures, network administrators can execute the display ospf 100 () interface GEO/0/1 command on RouterS to obtain error-related information. Users can perform OSPF failure diagnosis based on this information. (Please use English lowercase letters to complete the command, and the command cannot be abbreviated)

Question51: If you are faced with a complex network failure, and after evaluation, it is considered that the troubleshooting cannot be completed in a short time, and at this time the user urgently needs to restore the availability of the network, then which is the correct approach?

Question52: BGP routing strategy can control the distribution and reception of routes.

Question53: As shown in the figure, MPLS/BGP IPVPN is deployed in the network. The MP-BGP neighbor relationship is established between PE1 and PE2 through the LoopbackD interface. After the configuration is completed, it is found that CE1 and CE2 cannot learn routes from each other. Use the command on PE2 to query neighbor information as shown in the figure. What is the most likely cause of the problem?

Question54: Regarding sham link, which of the following description is wrong?

Question55: According to this picture, what can we judge? (Multiple choice)

Question56: (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.

Question57: After configuring the VLAN-based MAC address drift detection function, if the MAC address drifts, you can configure the actions of the interface according to your needs.
Which of the following is not a configurable action?

Question58: Which of the following regarding the configuration description is wrong?

Question59: A park deployed IPv6 for business testing. There are 4 routers in the network, running OSPFV3 to realize the interconnection and intercommunication of IPv6 networks. As shown in the figure, an engineer checked the LSDB of R2 and intercepted one of the Link-LSAs. Regarding the description of the LSA, which of the following statements are correct? (Multiple choice)

Question60: OSFFv2 is an IGP running on an IPv4 network: OSPFV3 is an IGP running on an IPv6 network. Compared with OSPFv2, SPFV3 has a similar LSA type, but the function is slightly different. Which of the following is not included in the LSA type of OSPFv3?

Question61: 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)

Question62: According to this picture, we can judge:

Question63: 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)

Question64: If the display current-configuration can reach the IS-IS configuration, but there is no IS-IS configuration in the display saved-configuration, what does it mean?

Question65: In the intra-domain MPLS VPN network, when the data packet enters the public network and is forwarded, it will be encapsulated with two layers of MPLS labels. Regarding the description of the two layers of labels, which of the following options is wrong?

Question66: When troubleshooting MSTP, you executed the display current-configuration command to obtain the configuration file of the device. Which of the following statements is wrong?

Question67: 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?

Question68: (Connection) The default MPLS label release method and label distribution control method of Huawei routers and label retention methods are respectively

Question69: MPLS is called multi-protocol label switching. Regarding the label description in MPLS, which of the following is correct? (Multiple choice)

Question70: (Drag and drop) Please match the following DHCP attack types with corresponding explanations.

Question71: 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?

Question72: Regarding the role of ping and tracert, which of the following statements is correct?

Question73: In an MPLS network, there are different types of operations for labels, among which the meaning of the "pop" action is?

Question74: Regarding the difference between NSR and NSF, which one is correct?

Question75: For the same MAC address, the priority of the manually configured MAC entry is higher than the automatically generated entry.

Question76: Which of the following statements about the MP_REACH_NLRI attribute of BGP4+ is correct? (Multiple choice)

Question77: The Router ID of OSPFv3 needs to be configured in dotted decimal notation with a length of 128bits.

Question78: When deploying MPLS/BGP IP VPN, regarding the use of BGP to exchange routing information between PE-CE, which of the following description is wrong?

Question79: Compared with the OSPFv2 message header, what fields are added in the OSPFv3 message header?

Question80: What is the meaning of the display current-configuration I include vlan command?

Question81: Which of the following commands can be used to view BGP VPNv4 routing and BGP private network routing information on PE?

Question82: As shown in the figure, all routers run OSPF, because R3 is in the backbone area, so there is no type 3 LSA in the LSDB of R3.

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

Question84: Which of the following reasons may cause the hosts in the same VLAN of the LAN to fail to communicate? (Multiple choice)

Question85: 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?

Question86: According to this picture, what can we judge? (Multiple choice)

Question87: Regarding the role of ping and tracert, which of the following statements is correct?