h12-811-v1.0 3

The priority of OSPF routing protocol is (). 0. 10. 60. 100.

The role of the OSPF protocol is. Pass routing information. Transmit MAC information. Pass ARP information. No effect.

UDP is connectionless and must rely on () to ensure the reliability of transmission. Internet Protocol. Transmission Control Protocol. Network layer protocol. Application layer protocol.

Use the command kdir test in the VRP operating platform. The system will create a directory named test. True. False.

Since the TCP protocol uses a three-way handshake mechanism when establishing a connection and closing a connection, TCP supports reliable transmission. True. False.

VRP operating system commands are divided into four levels: access level, monitoring level, configuration level, and management level. Which level can run various business configurations and set commands but cannot operate the file system?. Configuration level. Access level. Management level. Monitoring level.

UDP cannot guarantee the reliability of data transmission, and does not provide functions such as message sequencing and flow control. It is suitable for flows that do not require high transmission reliability, but require high transmission speed and delay (). True. False.

What kind of packets does the OSPF protocol use to discover and maintain neighbor relationships? (). LSR. HELLO. LSU. DD.

VRP operating system commands are divided into four levels: access level, monitoring level, configuration level, and management level. Which level can run various business configuration commands but cannot operate the file system? (). Configuration level. Monitoring level. Access level. Management level.

Using a traditional landline to make a call is a way of network communication. (). True. False.

In the VRP interface, use the command delete vrpcfg.zip to delete a file. The file must be emptied in the recycle bin to completely delete the file. (). True. False.

In what state does the OSPF protocol determine the master-slave relationship of DD. packets? (). ExStart. Full. 2-way. Exchange.

The following two configuration commands can realize the router RTA. The main and backup backup routes to the same destination 10.1.1.0: () (RTA)ip route--statiC.10.1.1.02412.1.1.1 permanent(RTA)ip route--statiC.10.2.2.02413.1.1.1. True. False.

In the network shown in the figure below, the bridge ID of the switch has been marked. Enter the command stp rootsecondary on the sWD. switch and the following switch will become the root bridge of this network. (). SWC. SWA. SWB. SWD.

If the Length of an Ethernet data frame/Type = 0x8100, which of the following statements is correct? (). There must be an IP header in the upper layer of this data frame. This data frame must carry VLAN TAG. There must be a UDP header in the upper layer of this data frame. There must be a TCP header in the upper layer of this data frame.

FAT AP can independently complete wireless user access, wireless user authentication, and business data forwarding without AC. (). True. False.

In the WLAN network architecture, terminal devices that support the 802.11 standard are called? (). Client. AC. STA. AP.

The following statement about static routing is wrong (). Cannot automatically adapt to changes in network topology. Manual configuration by network administrator. Low system performance requirements. Routers need to exchange routing information.

Which of the following IPv4 addresses can be used by a host to directly access the Internet? (). 192.168.1.1/24. 172.32.1.1/24. 172.16.255.254/24. 10.255.255.254/24.

The switch becomes a logical switch after stacking and clustering, and Eth-Trunk across physical devices can be deployed to improve network reliability. (). True. False.

What is the value of TPID. defined by IEEE802.1Q? (). 0x8200. 0x7200. 0x8100. 0x9100.

When the Access type port sends a message, it will (). Strip the VLAN information of the high packet, and then send it out. Type the PVID. information of this port, and then send it out. Send tagged messages. Add the VLAN information of the message, and then send it out.

The management of users by NAS devices is based on domains. Each user belongs to a domain, and a domain is a group composed of users belonging to the same domain. (). True. False.

What is correct about the SNMP protocol? (). SNMP protocol uses multicast to send management messages. The SNMP protocol only supports sending management messages on the Ethernet link. SNMP uses ICMP as the network layer protocol. SNMP uses UDP as the transport layer protocol.

The IPv6 address 2001: ABEF:2240E:FFE2:BCC0:CD0:DDBE:8D58 cannot be abbreviated. (). True. False.

Which state does the 0SPF protocol use to indicate that the adjacency relationship has been established? (). Full. 2-way. Attempt. Down.

The tracert diagnostic tool in Huawei routers is used to track the data forwarding path. (). True. False.

The broadcast address is a special address that all the host bits in the network address are set to, and it can also be used as a host address. (). True. False.

The last option field (option) of 1Pv4 is variable-length optional information. What is the maximum length of this field? (). 10B. 40B. 60B. 20B.

Which of the following advantages does the single-arm routing approach achieve inter-VLAN routing and intercommunication? (). Reduce the number of equipment. Reduce the use of IP addresses. Reduce the number of link connections. Reduce routing table entries.

The switch receives a unicast data frame. If the destination MAC of the data frame can be found in the MAC table, the data frame will be forwarded from the corresponding port of this MAC. (). True. False.

The output information of the link aggregation port of a certain switch is as follows. If you want to delete Eth-Trunk1, which of the following commands is correct? (). undo interface Eth-trunk 1. inte GigabitEthernet 0./0/2 Undo eth-trunk Quit Undo interface eth-trunk 1. inte GigabitEthernet 0./0/1 Undo eth-trunk Quit inte GigabitEthernet0./0/2 Undo ethtrunk Quit. inte GigabitEthernet 0./0/1 Undo eth-trunk Quit Undo interface eth-trunk 1.

Which information of the data frame is used by the VLANIF interface to determine whether to perform Layer 2 or Layer 3 forwarding? (). Destination MAC. Source MAC. Destination port. Source IP.

If the value of the ypeLength field of an Ethernet data frame is 0x0800, the length of the upper layer message header carried by this data frame is in the range of 20-60B. (). True. False.

When using FTP for file transfer, how many TCP connections will be established? (). 2. 1. 3. 4.

In order to join the wireless network STA. The wireless network information needs to be obtained first. Which of the following messages is used by the STA to actively obtain the SSID information? (). Probe. Join. Discovery. Beacon.

In a broad sense, the transmission medium that constitutes the wireless local area network wlan does not include? (). Rays. Radio wave. infrared. laser.

Which field of the ipv6 packet header can be used for QoS? (). TraffiC.Class. PayloaD.Length. Version. Next Header.

After the network administrator uses the TracertRoute function on the router device, in the data packet sent by the router, the value of the Protoco1 field in the IPv4 header is? (). 17. 2. 6. 1.

The switch is connected to the host. What is the common port link type of the switch? (). Access link. Trunk link. Trunk link. HybriD. link.

When using the FTP protocol to upgrade the router software, the transmission mode should be selected (). Binary mode. Byte mode. Text mode. Stream byte mode.

The network structure and 0$PF partition are shown in the figure. In the figure, except for RTA., the routers RTB.RTC. and RTD. are ABR routers. () (RTA) ip route-statiC.10.1.1.02412.1.1.1 permanent (RTA) ip route-statiC.10.2.2.02413.1.1.1. True. False.

The network administrator hopes to be able to effectively use the P address of the 192.168.176.0/25 network segment. Now that the company's marketing department has 20 hosts, which of the following address segments is best allocated to the marketing department? (). 192.168.176.160/27. 192.168.176.0/25. 192.168.176.96/27. 192.168.176.48/29.

What is the main function of the dynamic routing protocol? (). Manage routers. Generate IP address. Dynamically generate routing entries. Control router interface status.

The device port running the STP protocol is in the Forwarding state. Which of the following statements are correct? (). This port not only forwards user traffic but also processes BPDU packets. This port only receives and processes BPDUs, and does not forward user traffic. The port will construct a MAC address table based on the received user traffic, but does not forward user traffic. The port not only does not process BPDU packets, but also does not forward user traffic.

The following description about the specified port of the spanning tree is correct ()?. The designated port can forward configuration BPDU packets to the network segment connected to it. The port on the root switch must not be a designated port. Each switch has only one designated port. The port on the root switch must be a designated port.

Which of the following statements about link aggregation are correct? (). GE electrical interfaces and GE optical interfaces cannot be added to the same Eth-Trurnk interface. Eth-Trurnk interfaces cannot be nested. When two devices are connected, it is necessary to ensure that the link aggregation mode on both devices is the same. GE interface and FE interface cannot be added to the same Eth-Trunk interface.

What is the total length of the VLAN frame format defined by IEEE802.1Q? (). 1. 2. 3. 4.

CSS refers to the combination of two switch devices that support cluster features. Logically combined into one switch device. (). True. False.

Which of the following statements about single-arm routing are correct? (). On the switch, configure the port connected to the router as a Trunk port, and allow the relevant AN frame to pass. One physical connection per VLAN. Need to create a subinterface on the router. Only one physical link is used between the switch and the router to connect.

The election of the root switch in STP only compares the priority of the switch, while in RSTP, the priority of the switch and the MAC address are compared at the same time. (). True. False.

The host uses the IP address 192.168.1.2 to access the Internet-it must go through NAT. (). True. False.

In the wLAN network architecture, terminal devices that support the 802.11 standard are called? (). Client. AC. STA. AP.

STA. Before associating to AP, it needs to obtain SSID through some message exchange. What are these messages? (). Discovery. Beacon. Probe. ResponseProbe Request.

Which of the following statements about MPLS Labe1 labels is wrong? (). The label is encapsulated between the network layer and the transport layer. The label is carried by the header of the message and does not contain the topologyinformation. The label is used to uniquely identify the forwarding equivalence class FEC to which a packet belongs. The tag is a short identifier with a fixed length. It only has a local meaning.

Both pwD. and dir commands in the VRP operating platform can view the file information in the current directory, (). True. False.

OSThe I reference model from high-level to bottom-level is (). Application layer, transport layer, network layer, data link layer, physical layer. Application layer Session layer Presentation layer Transport layer Network layer Data link layer Physical layer. Application layer Presentation layer Session layer Network layer Transport layer Data link layer Physical layer. Application layer Presentation layer Session layer Transport layer Network layer Data link layer Physical layer.

A company applies for a C. address segment, which needs to be evenly distributed to 8 subsidiaries. The largest subsidiary has 14 computers. Different subsidiaries must be in different network segments. The subnet mask should be designed as ( ). 255.255.255.240. 255.255.255.128. 255.255.255.192. 255.255.255.0.

LACP protocol priority, switch A. and switch B. adopt LACP mode link aggregation, and all interfaces join the link aggregation group, and set the maximum number of active ports to 3, then which interface of switch A is not an active port? (). G0/0/1. G0/0/3. G0/0/0. G0/0/2.

VLAN4095 cannot be created on Huawei switches, and VLAN1 cannot be created (). True. False.

Which of the following port states is not included in the RSTP protocol? (). Learning. Discarding. Forwarding. Blocking.

The following statement about the HybriD. port is correct (). When HybriD. port sends data frame, it must carry VLAN TAG. The HybriD. port only receives data frames with VLAN TAG. The HybriD port can strip off the TAG of some VLANs in the direction of the outbound interface. HybriD. Port does not require PVID.

What elements can NAPT transform? (). MAC. address + port number. Only IP address. IP address + port number. Only MAC. address.

The role of the collaboration layer in the SDN architecture is to complete job deployment based on user intentions. OpenStack belongs to the business collaboration layer (). True. False.

The following statement about Python is incorrect (). Is a fully open source high-level programming language. Has a rich third-party library. Have a clear grammatical structure, easy to learn, and high efficiency for colleagues. Can be used for automated operation and maintenance scripts, artificial intelligence data science and many other fields.

The administrator has configured the AR2200. Which of the following descriptions about the configuration information is correct (). The saved configuration file will be replaced by the running configuration file. If the user wants to clear the next startup configuration file of the device configuration, they should select "N". If the user wants to clear the next startup configuration file of the device configuration, they should select "Y". The next startup file of the device configuration will be retained.

When building a campus network, which of the following protocols can be used to avoid Layer 2 loops? (). SNMP. RSTP. NAT. OSPF.

The tree network topology is actually a hierarchical star structure, which is easy to expand the network scale, but the higher the level, the more serious the network problem caused by the node failure (). True. False.

The router needs to modify the destination IP address in the data packet when forwarding the data packet (). True. False.

In the broadcast network, OSPF runs on four routers in the same area and on the same network segment. OSPF will automatically elect one DR and multiple BDRs to achieve a better backup effect (). True. False.

When the IPv4 protocol is used as the network layer protocol, which field is not included in the network layer header? (). Source IPv4 Address. TTL. Destination IPv4 Address. Sequence Number.

Take effect immediately after the Router ID of the OSPF process is modified (). True. False.

How many types of OSPF packets are there? (). 2. 4. 5. 3.

Network switch A and router A are connected by two links. The two links are aggregated in manual load sharing mode. The aggregated port number is 1, and the aggregated link needs to carry VLAN TAG100 when forwarding data. The switch When A uses a trunk link, which of the following configurations need to be used by switch A? (). 2. 4. 5. 3.

By default, the port cost calculated by STP has a certain relationship with the port bandwidth, that is, the larger the bandwidth, the higher the cost (). Big. Unanimous. uncertain. small.

In the RSTP standard, in order to improve the convergence speed, the port that the switch is directly connected to the terminal can be defined as (). Edge port. Root port. Fast port. Backup port.

The Backup port in RSTP can replace the failed root port (). True. False.

All four switches run STP, and various parameters adopt default values. If the G0/0/2 port of switch C is blocked and the configuration BPDU cannot be sent through this port, how long will the blocked port in the network enter the forwarding state (). About 3 seconds. About 50 seconds. About 30 seconds. About 15 seconds.

The link aggregation interface can only be used as a Layer 2 interface (). True. False.

If the largest number in an ACL rule is 12, by default, the user does not specify a number when configuring a new rule, then the number assigned to the new rule by the system is? (). 13. 15. 14. 16.

The main function of the DNS protocol is (). DNS. file transfer. Remote access. Mail transfer.

What is the MAC address of the data link layer of each VAP on the AP? (). SSID. BSS. ESS. BSSID.

Which of the following does not include the advantages of Wi-Fi6 compared to Wi-Fi5? (). Higher bandwidth. Lower transmission delay. Higher power consumption. Higher number of access terminals per AP.

PPPoE sessions can only use CHAP authentication (). True. False.

Regarding the IPv6 address 2031:0000:720C:0000:0000:09E0:839A:130B, which of the following abbreviations are correct? (). 2031:0:720C:0:0:9E:839A:130B. 2031:0:720C:-9E0:839A:130B. 2031:0:720C:0:0:9E0:839A:130B. 2031:720C:9E0:839A:130B.

Which of the following protocols does the RA. message used by IPv6 stateless autoconfiguration belong to? (). IGMPv6. ICMPv6. UDPv6. TCPv6.

When planning a campus network, which of the following mask lengths is recommended for device interconnection IP addresses? (). 16. 32. 24. 30.

The correct statement about the transport layer protocol is (). UDP is suitable for the transmission of delay-sensitive traffic, and can be reorganized according to the sequence number field in the message header. Well-known port number range is 0-1023. UDP uses the STNOACK flag to request and confirm the establishment of a connection. The establishment of a TCP connection is a three-way handshake, and the termination of a TCP connection requires a four-way handshake.

Which of the following descriptions of wireless devices is correct? (). The wireless device does not have a wired interface. FIT AP-Generally complete user access, authentication, service forwarding and other functions independently. The wireless controller AC is generally located at the convergence layer of the entire network, providing high-speed, safe and reliable VLAN services. FAT AP generally works with wireless controller.

What is the full name of the general routing platform VRP? (). Versatile Redundancy Platform. Versatile Routing Protocol. Versatile Routing Platform. Virtual Routing Platform.

VRP supports OSPF multi-process. If the process number is not specified when OSPF is enabled, the process number used by default is (). 10. 100. 0. 1.

The administrator hopes that RTA. uses static routing and preferentially sends data packets to RTB's Loopback0 interface through G0/0/1 port, while G0/0/2 is used as a backup. How to configure on RTA to achieve this requirement (). ip route-statiC.10.0.2.2255.255.255.255 10.0.12.2ip Route-statiC.10.0.2.2255.n255.255.255 10.0.21.2 preference 40. ip route-statiC.10.0.2.2255.255.255.25 5 10.0.12.2 preference 70 ip route-static/ n10.0.2.2255.255.255.25510.0.21.2. ip route-statiC.10.0.2.2255.255.255.255 10.0.12.2ip Route-statiC.10.0.2.2255.255.n255.25510.0.21.2. ip route-statiC.10.0.2.2255.255.255.25510.0.12.2ip Route-statiC.10.0.2.2255.n255.255.255.

If the broadcast address of a network is 172.16.1.255, then its network address may be (). 172.16.1.128. 172.16.2.0. 172.16.1.1. 172.86.1.253.

The administrator wants to allocate a Hundred P address on the G0/0/0 interface of the router. Which of the following addresses is correct? (). 192.168.10.112/30. 237.6.1.2/24. 127.3.1.4/28. 145.4.2.55/26.