EMT Practice Test

1. Question Content...

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Question1: Refer to the following commands run on GigabitEthernet0/0/1 and GigabitEthernet0/0/2. Which of the following statements are true?

Question2: < Huawei > system-view
[Huawei]command-privilege level 3 view user save
Refer to the command output. What is the result of the shown command?

Question3: Following a failure of services in the network, an administrator discovered that the configuration in one of the enterprise routers had been changed. What actions can be taken by the administrator to prevent further changes?

Question4: Which of the following statements about static routes on Huawei devices is false?

Question5: The router ID of the OSPF-enabled router must be the same as the IP address of an interface on the router.

Question6: (Which of the following methods can be used to assign service VLANs during campus network planning?)

Question7: A switch receives a unicast data frame with a VLAN tag but cannot find the destination MAC address of the data frame in its MAC address table. In this case, which action will the switch take?

Question8: (Which of the following statements is true about active interface election for an Eth-Trunk in LACP mode?)

Question9: SNMP packets are transmitted by UDP.

Question10: The IP address 192.168.1.127/25 represents a ( ) address.

Question11: When the host accesses the web service of the server, the value of the "Protocol" field at the network layer is
6.

Question12: In the case of Huawei routers, what is the "-i" parameter in a Ping command issued on a VRP operating system used to set?

Question13: During STP calculation, the port cost is associated with the port bandwidth by default. Which of the following statements about the relationship between port cost and port bandwidth is true?

Question14: A company applies for a class C IP address for subnetting. It has six branches and the largest branch should have 26 hosts. What would be an appropriate subnet mask for the largest branch?

Question15: Which of the following port statuses may exist on an STP-enabled switch?

Question16: A routing entry contains multiple fields. Which of the following statements about these fields is false?

Question17: On the VRP platform, which of the following parameters can be used together with the "ping" command to specify the source address of an echo request message?

Question18: UDP does not guarantee data transmission reliability and does not provide packet sorting and traffic control functions. It is suitable for the traffic that has low requirements for data transmission reliability, but high requirements for the transmission speed and delay.

Question19: An ACL rule is as follows. Which of the following IP addresses can be matched by the permit rule?
rule 5 permit ip source 10.0.2.0 0.0.254.255

Question20: Which of the following commands can switch a view from the system view to the user view?

Question21: What is used as the data link-layer MAC address that identifies each VAP on an AP?

Question22: A company applies for a class C IP address for subnetting. It has eight branches, and the largest branch has a subnet that should support at least 14 hosts. What would be an appropriate subnet mask?

Question23: (Each network device running SNMP runs an agent process locally.)

Question24: VLAN 4095 is reserved for system use and VLAN 1 cannot be deleted on Huawei switches.

Question25: Which of the following ACLs can match the transport layer port number?

Question26: Which of the following VRP commands can be used to enter area 0 view?

Question27: Refer to the following display vlan command output on SWA. Which of the following interfaces can forward untagged data frames from VLAN 40?

Question28: If the transport-layer protocol is UDP, the value of the "Protocol" field at the network layer is 6.

Question29: When an Ethernet frame is received by an interface on a Layer 2 Ethernet switch, which field is used to generate an entry in the MAC address table?

Question30: Which of the following statements is true about the Forward Delay timer of STP?

Question31: Fit APs can work independently of an AC.

Question32: On the network shown in the figure, host A logs in to router A through Telnet and obtains the configuration file of router B through FTP on the remote CLI. How many TCP connections exist on router A?

Question33: In a broadcast address, all host bits are set to 1, and a broadcast address can be used as a host address.

Question34: (The IPv6 address architecture does not include which of the following address types?)

Question35: What is the length range of an Ethernet_II frame that contains an Ethernet header?

Question36: In RSTP, an edge port becomes a common STP port after receiving a configuration BPDU.

Question37: (You can run the "pwd" and "dir" commands on the Versatile Routing Platform (VRP) to view file information in the current directory.)

Question38: As specified by the RSTP protocol, when a root port fails, which type of port will function as a new root port and enter the forwarding state without any delay?

Question39: Which of the following statements is true?

Question40: Refer to the following display vlan command output. Which of the following statements are true?

Question41: The users who log on the router through Telnet are not permitted to configure an IP address. What is the possible reason?

Question42: What is the protocol number of OSPF at the network layer?

Question43: When a router is powered on, the router reads the configuration file saved in the default save directory to get itself initialized. If the configuration file does not exist in the default save directory, what does the router use to initialize itself?

Question44: How many port states are involved in RSTP?

Question45: Which of the following BIDs cannot be contained in a configuration BPDU sent by a switch?

Question46: What is used as the data link-layer MAC address that identifies each VAP on an AP?

Question47: Which of the following is not included in the routing table?

Question48: After the administrator performs the configuration shown in the figure on a router, which of the following commands can be used to specify a short lease for addresses assigned using DHCP?

Question49: If the MAC address of an interface is 00E0-FCEF-0FEC, the corresponding EUI-64 address is ( ).

Question50: The router that runs OSPF first enters the Full state and then synchronizes the LSDB.

Question51: On the network shown in the figure, Host A and Host B cannot communicate with each other.

Question52: As shown in the figure, all switches run STP. Assume that the path cost of all ports is 200. What is the root path cost contained in the configuration BPDU received by G0/0/4 on SWD?

Question53: When two switches are connected through link aggregation, what are the requirements for the interfaces on the two switches?

Question54: For STP, the Message Age in the configuration BPDUs sent by the root bridge is 0.

Question55: (The administrator performs the configuration shown in the figure on a router, and a host is connected to Gi/0
/0 of the router. Which of the following statements is true about the IP address obtained by the host through DHCP?)

Question56: An authenticator router has been configured with two domains named "Area1" and "Area2", following which a user is created with the username "huawei" and the password "hello" for authentication. Which domain does this user belong to?

Question57: The following figure shows the display interface Eth-Trunk 1 command output on SWA. In the MAC address table of SWA, which of the following interfaces maps the MAC address of SWB?

Question58: Assuming that OSPF has been enabled on all routers in the following figure, which router is the BDR on this network?

Question59: Which of the following planes does a network device have?

Question60: telnetlib is a module provided by Python to implement the Telnet protocol.

Question61: On the command line interface of Huawei AR routers, the role of the Save command is to save the current system time.

Question62: Refer to the captured three packets shown in the figure. Which of the following statements is false?

Question63: Which of the following is not a common network layer in a midsize campus network?

Question64: (Refer to the display startup command output shown in the figure on an AR2200 router. Which of the following statements about the command output is false?)
<Huawei>display startup
MainBoard:
Startup system software: sdl:/ar2220-v200r003c00spc200.cc
Next startup system software: sdl:/ar222b-v200r003c00spc200.cc
Backup system software for next startup: null
Startup saved-configuration file: null
Next startup saved-configuration file: null
Startup license file: null
Next startup license file: null
Startup patch package: null
Next startup patch package: null
Startup voice-files: null
Next startup voice-files: null

Question65: What is the TPID value defined by IEEE 802.1Q?

Question66: A router that runs OSPF can enter the Full state only after Link-State Database (LSDB) synchronization is completed.

Question67: Which of the following WLAN security policies support open link authentication?

Question68: Which of the following mask lengths is recommended for device interconnection IP addresses during campus network planning?

Question69: When an AP and an AC are located on different Layer 3 networks, which of the following methods is recommended for the AP when discovering the AC?

Question70: Which of the following IEEE 802.11 standards supports the 2.4 GHz frequency band only?

Question71: After an Eth-Trunk in LACP mode is created, devices on both ends send LACPDUs to elect the Actor. Which of the following parameters in LACPDUs determine the Actor election?

Question72: In STP, the bridge ID on the switching network is as follows. With which of the following bridge IDs is the switch selected as the root bridge?

Question73: A Layer 2 ACL can match information such as the source MAC address, destination MAC address, source IP address, and destination IP address.

Question74: On Huawei routers, which of the following is the default preference of static routing?

Question75: Which of the following OSPF versions is specific to IPv6?

Question76: It is advised to assign static IP addresses to servers during campus network planning.

Question77: If a device running STP receives an RSTP configuration BPDU, it discards the BPDU.

Question78: Which of the following IEEE 802.11 standards supports a theoretical negotiated rate of 5 Gbit/s or higher?

Question79: A Layer 2 switch works at the data link layer. As such, it can identify MAC addresses in data frames, forward data based on MAC addresses, and record mappings between MAC addresses and interface numbers in its MAC address table.

Question80: In the following figure, all links are Ethernet links, and all interfaces on the routers are running OSPF. Given this, how many DRs will be elected on this network?

Question81: According to the VTY user interface configuration shown in the following figure, the user level is set to 3.

Question82: The country code configuration affects the actual transmission frequency and maximum transmission power.

Question83: Static NAT can only implement one-to-one mapping between private and public addresses.

Question84: When forwarding a data packet, a router needs to change the destination IP address of the packet.

Question85: The following figure shows the display stp command output on an STP-enabled port - Ethernet 0/0/1.
Which of the following statements about the command output is false?

Question86: By default, all SNMP versions (SNMPv1, SNMPv2c, and SNMPv3) are supported on Huawei AR G3 series routers.

Question87: Which of the following statements about the network shown in the figure is true?

Question88: In the following figure, all links are Ethernet links, and all interfaces on the routers are running OSPF. Given this, how many DRs will be elected on this network?

Question89: Which of the following commands is used to display the CPU usage of a router?

Question90: Which of the following fields are included in an MPLS header?

Question91: The network administrator performs the configuration shown in the following figure on RTA. If a user needs to be authenticated in the authentication domain named huawei, which of the following statements is true?

Question92: If the broadcast address of a network is 172.16.1.255, which of the following addresses is the network address?

Question93: If the packet matches the deny rule in an ACL, the packet is discarded.

Question94: Which of the following packets are exchanged between STAs and an AP to obtain the AP's SSID before association with the AP?

Question95: Which of the following states indicates that the OSPF neighbor relationship has been established?

Question96: On the Huawei VRP, what is the default preference of different route types, in descending order?

Question97: What is the total length of the port ID in STP?

Question98: The Network Management Station uses SNMP to manage devices. Which SNMP message is sent when an SNMP-registered abnormal event occurs?

Question99: Which of the following network types are supported by OSPF?

Question100: Which of the following statements about hybrid interfaces is true?

Question101: Which of the following information is displayed when an entered command is incomplete on the Versatile Routing Platform (VRP)?

Question102: Which of the following statements regarding static routing and dynamic routing is incorrect?

Question103: More than two switches can be stacked into one logical device.

Question104: Which of the following operations are mandatory to restore the factory default settings of an AR2200 router?

Question105: (An administrator cannot log in to a Huawei router through Telnet, but other administrators can log in to the router. Which of the following are possible causes?)

Question106: Which of the following is the default port number of the Telnet server?

Question107: The priority of static routes cannot be manually specified.

Question108: An ACL is essentially a packet filter. An ACL takes effect only after it is applied to a service module.

Question109: (Which of the following are not main functions of routers?)

Question110: If AAA authentication is used on Huawei devices and the remote server does not respond, the authentication can be performed on network devices.

Question111: In RSTP, an edge port becomes a common STP port after receiving a configuration BPDU.

Question112: To provide the information about the IP addresses that a user packet traverses along the path to the destination, which of the following does Tracert record in each expired ICMP TTL packet?

Question113: (An Eth-Trunk interface can be used only as a Layer 2 interface.)

Question114: (Which of the following routing protocols are dynamic routing protocols?)

Question115: By referring to the network structure and OSPF areas shown in the figure, it can be determined that all routers on the network except RTA are ABRs.

Question116: Which of the following parameters is used to elect the root bridge in STP?

Question117: RSTP uses the proposal/agreement mechanism to shorten the time that an upstream port waits before transitioning to the Forwarding state, but no temporary loop occurs. Why?

Question118: Network devices running SNMP can proactively report traps to help network administrators detect faults in a timely manner.

Question119: Dynamic routing protocols can automatically adapt to network topology changes.

Question120: What are the advantages of using DHCP to allocate IP addresses?

Question121: When a switch port receives a frame that does not carry a VLAN tag, it must add a PVID to the frame.

Question122: For STP, the default root path cost of the root bridge is 0.

Question123: Which of the following port numbers is used by the FTP control plane?

Question124: What function does Ctrl+Z have in the VRP system?

Question125: When the ACL in the following figure is configured on a Telnet server, only the device with an IP address of
172.16.105.2 can remotely log in to the Telnet server.
bash
Copy code
acl number 2000
rule 5 permit source 172.16.105.2 0

Question126: Which of the following statements regarding Designated Routers (DR) in OSPF are correct?

Question127: As shown in the figure, RTA uses NAT and has an address pool configured to implement many-to-many non- NAPT address translation, so that hosts on the private network can access the public network. Assume that the address pool has only two public IP addresses, which are translated for Host A and Host B.
If Host C wants to access the public network, which of the following statements is true?

Question128: What is the protocol of the Router Advertisement (RA) packet, which is used in IPv6 stateless address auto- configuration?

Question129: The following figure shows the display interface Eth-Trunk 1 command output on a switch. Which of the following commands can be used to delete Eth-Trunk 1?

Question130: Which of the following elements are included in a routing table?

Question131: Which of the following parts compose SNMP?

Question132: In STP, which of the following items may affect the selection of the root switch?

Question133: Which of the following statements is true about root bridge election in STP?

Question134: Which of the following networks are LANs?

Question135: If Spanning Tree Protocol (STP) is disabled on the network consisting of switches, a Layer 2 loop will definitely occur.

Question136: telnetlib is a module provided by Python to implement the Telnet protocol.

Question137: Which of the following statements is true about link aggregation in manual load balancing mode?

Question138: (When a network engineer enters a command, the following information is displayed:
Error: Unrecognized command found at 'A' position. Which of the following statements is true about such information?)

Question139: Assume that an OSPF-enabled router has no loopback interface configured. What would be used as the router ID?

Question140: (Which of the following OSPF packets can be used to confirm the received Link State Update (LSU) packets?)

Question141: (Loops may cause broadcast storms on a Layer 2 network.)

Question142: After a switch restarts, static MAC address entries saved on the switch remain in the MAC address table.