Estudo para Certificação 3

The 14 available bands in the 2.4GHz band have no channel overlap. True. False.

When the AP and AC are in different three-layer networks, which method is recommended for the AP to discover the AC?. DNS. Manually specified on the AP. DHCP. Broadcast method.

The data link layer uses PPP encapsulation, and the IP addresses at both ends of the link may not be in the same network segment. True. False.

FIT AP can work independently without AC. True. False.

SNMP messages are carried by UDP. True. False.

The network management system can only view the running status of the device through the SNMP protocol but cannot deliver the configuration. True. False.

Which of the following types does an IPV6 address contain? (Multiple choice). Anycast address. Multicast address. Unicast address. Broadcast address.

How many bits is the total length of the IPV6 address?. 64. 96. 128. 32.

When using the SNMPv1 protocol to manage network devices, which of the following commands does the network management system use to complete the configuration of the network devices?. Get-Request. Response. Set Request. Get-Next Request.

The virtual machine is the basis for realizing NFV. Which of the following statements about the characteristics of virtualization is correct? (Multiple choice). Partitioning: Multiple virtual machines can run concurrently on a single physical network. Isolation: Virtual machines on the same physical server are isolated from each other. Encapsulation: Virtual machines all share an operating space, and encapsulation is achieved through namespaces. Hardware independence: Virtual machines and hardware decoupling support migration of virtual machines between servers.

Which of the following options describes the concept of NFV architecture correctly? (Multiple choice). VNFM, virtual network function management, is responsible for the life cycle management of VNF. NFVO (NFV Orchestrator) is responsible for business orchestration. MANO consists of NFVO, VNFM and VIM. VIM (Virtualized Infrastructure Manager) virtual resource management, responsible for the virtualization of infrastructure.

Which of the following commands can change the device name to huawei?. sysname huawei. rename huawei. do name huawei. hostname huawei.

On the VRP platform, which of the following methods can be used to access the last historical command? (Multiple choice). Ctrl+P. Cursor up. Ctrl+U. Left cursor.

Which of the following types of ACL can match the transport layer port number?. Advanced ACLs. Basic ACLs. Layer 2 ACL. Intermediate ACLs.

In the network shown in the figure below, the router receives a data packet with the destination IP address 11.0.12.1 from host A. After the data packet is forwarded by the router, the destination mac and destination IP are respectively?. MAC-D 10.0.12.2. MAC-C 11.0.12.1. MAC-D 11.0.12.1. MAC-B 11.0.12.1.

Which devices are generally involved in the WLAN deployment scheme in the enterprise scenario? (Multiple choice). AC (Access Controller). AP. PoE switch. CPE.

The routing table shown in the figure, which of the following statements is correct? (Multiple choice). The router forwards the packet with the destination IP 10.0.2.2 from Ethernet0/0/0. The NextHop of the destination network 10.0.3.3/32 is not directly connected, so the router will not forward the data packet with the destination IP address 10.0.3.3. The router forwards the packet with the destination IP 10.0.3.3 from Ethernet0/0/0. The router forwards the packet with the destination IP 10.0.12.1 from Ethernet0/0/0.

In order to detect the connectivity status of the CAPWAP tunnel, which of the following CAPWAP packets does the AC use for detection after the CAPWAP tunnel is established? (Multiple choice). Keepalive. Echo. DPD. Hello.

In the network shown in the figure below, all routers run the OSPF protocol, and the link cost value is shown in the figure, what is the cost value of the route entry to the network 10.0.0.0/8 in the RTA routing table?. 100. 70. 20. 60.

As shown in the figure below, which of the following statements is correct?. Host A can ping host B through. Host A and host B can communicate only if the masks of host A and host B are set to be the same. The IP address masks of host A and host B are different, so host A and host B cannot communicate. The broadcast addresses of host A and host B are the same.

When two OSPF routers form a 2-WAY neighbor relationship, the LSDB has been synchronized. True. False.

In the network shown in the figure below, host A is not configured with a gateway, and host B has an ARP cache of the gateway. Which of the following statements is correct? (Multiple choice). Enable ARP proxy on the router G0/0/1 port, then host A can communicate with host B. The data packet sent by host B with the destination IP address 10.0.12.1 can be forwarded to host A. The data packet sent by host A with the destination IP address 11.0.12.1 can be forwarded to host B. Host A and host B cannot communicate bidirectionally.

Which of the following commands to configure the default route is correct?. [huawei] ip route-static 0.0.0.0 0.0.0.0 0.0.0.0. [huawei] ip route-static 0.0.0.0 255.255.255.255 192.168.1.1. [huawei-Serial0] ip route-static 0.0.0.0 0.0.0.0 0.0.0.0. [huawei] ip route-static 0.0.0.0 0.0.0.0 192.168.1.1.

If the network address of a network is 192.168.1.0, then its broadcast address must be 192.168.1.255. True. False.

What are the functions of DR and BDR in OSPF protocol? (Multiple choice). Reduce the number of adjacencies. Reduce the time for adjacency establishment. Reduce the types of OSPF protocol packets. Reduce the number of exchanges of link state information.

As shown in the figure below, which port of the following switch will be blocked?. G0/0/2 of SWC. G0/0/3 of SWA. G0/0/1 of SWC. G0/0/3 of SWB.

RSTP protocol does not include which of the following port states?. Forwarding. Learning. Discarding. Blocking.

Referring to the configuration of one-arm routing in the figure below, it can be judged that even if the ARP proxy is not enabled on the sub-interface of R1, the administrative department and the financial department can communicate with each other. True. False.

The output information of a certain switch is shown in the figure, which of the following statements is correct? (Multiple choice). Switch GE0/0/1 port does not carry VLAN TAG when sending VLAN20 data frames. When the GE0/0/2 port of the switch sends the data frame of VLAN20, it carries the VLAN TAG. When GE0/0/1 port of the switch sends VLAN10 data frames, it does not carry VLAN TAG. The user manually created 4 VLANs.

If the Length/Type=0×8100 of an Ethernet data frame, which of the following ports may this data frame be sent from? (Multiple choice). Switch Trunk type ports. Hybrid port of the switch. Access port of the switch. Serial interface of the router.

The load sharing modes at both ends of the Eth-Trunk may be inconsistent. True. False.

The port in the Discarding state in RSTP will discard the received data frames, but it can maintain the MAC address table according to the data frames received by the port. True. False.

When LACP is used for horizontal link aggregation, what is the default system priority of Huawei switches?. 36864. 24576. 4096. 32768.

Which of the following descriptions about Layer 2 Ethernet switches is wrong?. Layer 2 Ethernet switches work at the data link layer. Able to learn MAC address. It is necessary to make certain modifications to the layer 3 header of the forwarded message, and then forward it. Forward according to the layer 2 header information of the Ethernet frame.

As shown in the figure, the network administrator creates VLAN2 on SWA and SWB, and configures the ports connected to hosts on the two switches as Access ports, and assigns them to VLAN2. G0/0/1 of SWA and G0/0/2 of SWB are configured as trunk ports, allowing all VLANs to pass through. To achieve normal communication between the two hosts, you also need?. Configure G0/0/1 on the SWC as a trunk port and allow VLAN 2 to pass through, set G0/0/2 as an access port, and set PVID to 2. Create VLAN2 on SWC, configure G0/0/1 and G0/0/2 as trunk ports, and allow VLAN 2 to pass through. Just create BLAN2 on SWC. Configure G0/0/1 on the SWC as a trunk port and allow VLAN 2 to pass through.

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?. Fast port. Root port. Backup port. Edge port.

In a Layer 2 network with redundant links, which of the following protocols can be used to avoid loops?. VRRP. STP. ARP. UDP.

In the network shown in the figure below, from the perspective of security, router A refuses to receive OSPF packets and ICMP packets received from the G0/0/1 interface. Which of the following commands can achieve this requirement? (Multiple choice). acl number 3000 rule 5 deny 89 rule 10 deny icmp # interface GigabitEthernet0/0/1 traffic-filter inbound acl 3000 #. acl number 3000 rule 5 deny 89 rule 10 deny 1 # interface GigabitEthernet0/0/1 traffic-filter inbound acl 3000 #. acl number 2000 rule 5 deny 89 rule 10 deny 1 # interface GigabitEthernet0/0/1 traffic-filtet inbound acl 2000 #. acl number 3000 rule 5 deny ospf rule 10 deny icmp # interface GigabitEthernet0/0/1 traffic-filtet inbound acl 3000 #.

Which of the following statements about the ACL matching mechanism is correct? (Multiple choice). If the ACL does not exist, the ACL matching result is returned: no match. If the last rule packet is still not matched, the ACL matching result will be returned: no match. By default, the search starts from the rule with the smallest number in the ACL. Once a rule is matched, the search for subsequent rules is stopped. No matter whether the result of the packet matching ACL is "mismatch", "permit" or "deny", whether the packet is finally allowed or denied is actually determined by each business module that applies the ACL.

As shown in the figure, static NAT commands are deployed on router R1. When the PC accesses the Internet, the destination address in the data packet will not change. True. False.

Which of the following types of ACL cannot match network layer information?. Basic ACLs. Layer 2 ACL. User ACLs. Advanced ACL.

The ACL configuration information of a certain router is shown in the figure, which of the following statements is correct? # acl number 2000 rule 5 permit source 192.168.1.1 0 rule 10 deny source 192.158.1.1 0 #. The data packet whose source IP address is 192.168.1.254 is matched by the permit rule. Data packets with source IP addresses 192.168.1.1 and 192.168.1.254 are matched by the permit rule. The data packet whose source IP address is 192.168.1.1 is matched by the permit rule. The packet with the source IP address 192.168.1.1 is matched by the deny rule.

What is the main function of the DHCP DISCOVER message?. The server's confirmation response to the REQUEST message. The client is used to find the DHCP server. The client requests configuration confirmation, or renews the lease. The DHCP server is used to respond to the DHCP DISCOVER message, which carries various configuration information.

The administrator has configured the router as shown in the figure, and at the same time the administrator wants to assign a shorter lease period to the DHCP address. Which of the following commands should be used? ip pool pool1 network 10.10.10.0 mask 255.255.255.0 gateway-list 10.10.10.1. Lease 0. Dhcp select relay. Lease day 0 hour 10. Lease 24.

Which of the following IEEE 802.11 standards support working in the 5GHz frequency band? (Multiple choice). 802.11n. 802.11ax. 802.11a. 802.11g.

The configuration of the country code will affect the frequency used for actual transmission and the maximum transmission power. True. False.

The login timeout time in the VRP system can only be set under the VTY interface. True. False.

The network administrator hopes to effectively use the IP address of the 192.168.176.0/25 network segment. Now the company's marketing department has 20 hosts, which of the following address segments should be assigned to the marketing department?. 192.168.176.160/27. 192.168.176.0/25. 192.168.176.96/27. 192.168.176.48/29.

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

In the network shown in the figure below, all switches enable the STP protocol. Close the G0/0/2 port of SWA and configure the BPDU sending function, and G0/0/1 of SWC will re-converge to become the root port. Regarding this process, which of the following statements is correct? (Multiple choice). SWB forwards TCN BPDU to SWA. SWB sends a configuration BPDU with TCA set to SWC. SWC sends TCN BPDU to SWB. SWA sends a configuration BPDU with TC set.