Estudos para certificação 2

SNMP V1 defines 5 protocol operations. True. False.

MIB (management information base) is a virtual database that only exists on the NMS. True. False.

There is a TTL field in the header of the IP packet. Which statement about this field is correct? ists on the NMS. This field is used for data packet loop prevention. This field is used for packet fragmentation. This field is used to indicate the priority of the data packet. The length of this field is 7 bits.

What is the length of the basic IPv6 header Byte?. 40. 48. 32. 64.

Which field in the IPV6 header is similar to the TTL field in the IPV4 header?. hop limit. Next header. Traffic class. Version.

The function of telnet.read.all() in telnetlib is to read all the data until EOF. If the echo does not return EOF, it will be blocked consistently. True. False.

In the SNMP protocol by default, which port number is used by the agent process to send alarm messages to the NMS?. 161. 163. 164. 162.

If the MAC address of an interface is 00E0-FCEF-0FEC, then its corresponding EUI-64 address is?. 00E0-FCEF-FFFE-0FEC. 02E0-FCFF-FEEF-0FEC. 00E0-FCFF-FEEF-0FEC. 02E0-FCEF-FFFE-0FEC.

Which of the following commands can be used to query the configuration information of the ospf protocol of the device?. Enter the command "display this" in the ospf protocol view. Display current-configuration. Display ospf peer. Dis ip routing-table.

The ARP protocol can resolve the MAC address of the target device according to the target IP address, thereby realizing the mapping between the MAC address and the IP address. True. False.

Under the VRP interface, use the command startup saved-configuration backup.cfg to configure the backup.cfg file to be used at the next startup. True. False.

Which method does VRP not support to configure the router?. Configure the router through the mini USB port. Configure the router via FTP. Configure the router through the console port. Configure the router through telnet.

When routers are running in the same OSPF area, which is the correct description of their LSDB and routing table? (Multiple choice). All routers get the same link-state database. The routing table obtained by all routers is the same. The link state database obtained by each router is different. The routing table of each router is different.

Which of the following statements is correct?. The router works at the network layer. The switch works at the physical layer. The switch works at the network layer. The router works at the physical layer.

After the network administrator uses the Tracert Route function on the router device, in the data packet sent by the router, the value of the protocol field of the IPV4 header is?. 1. 2. 6. 17.

Which of the following protocols are dynamic routing protocols? (Multiple choice). Direct. static. BGP. OSPF.

The output information of the router is shown in the figure, which of the following statements is wrong?. The broadcast address corresponding to the Ethernet0/0/0 interface is 10.0.12.255. The physical link of the Ethernet0/0/0 interface is normal. The MTU value of the Ethernet0/0/0 interface is 1480. The IP address of the Ethernet0/0/0 interface is 10.0.12.1/24.

When configuring OSPF on a router, what must be manually configured? (Multiple choice). Specify the network type of each OSPF-enabled interface. Create an OSPF area. Create an OSPF process. Configure Router ID.

The figure below shows the routing table of a certain router. When the router receives a data packet with the destination IP address 9.1.1.1, the router will forward it according to the route 9.1.0.0/16, because the mask of this route The yard length is longer. True. False.

If the network address of a network is 10.1.1.0/30, then what is its broadcast address?. 10.1.1.3. 10.1.1.1. 10.1.1.4. 10.1.1.2.

The administrator has configured on R1 as shown in the figure, but R1 cannot learn the routes of other routers, so what is the possible reason? (Multiple choice) [R1] ospf [R1-ospf-1] area 1 [R1-ospf-1-area-0.0.0.1] network 10.0.12.0 0.0.0.255. This router did not advertise the network connected to the neighbor when configuring OSPF. This router is not configured with the authentication function, but the neighbor router is configured with the authentication function. When this router is configured, no OSPF process number is configured. The area ID configured by this router is different from the area ID of its neighbor routers.

The router running the OSPF protocol first reaches the FULL state, and then performs LSDB synchronization. True. False.

Which type of message is used by network devices running SNMPv1 protocol to actively send alarm information?. Trap. Response. Get-Next Request. Get-Request.

Which one is wrong about the description of the information shown in the picture? [R1] display interface g0/0/0 GigabitEthernet0/0/0 current state: Administratively DOWN Line protocol current state: DOWN. The GigbitEthernet0/0/0 interface is connected to a wrong cable. GigbitEthernet0/0/0 interface is not configured with an IP address. The GigbitEthernet0/0/0 interface is manually shut down by the administrator. GigbitEthernet0/0/0 interface is not enabled with dynamic routing protocol.

What is the function of the hello message of ospf? (Multiple choice). Neighbor Discovery. Synchronize router's LSDB. Update LSA information. Maintain Neighborhood Relationships.

The output information of a router’s routing table is shown in the figure, which of the following statements is correct? (Multiple choice). The outbound interface of this router reaching 10.0.0.1 is Ethernet0/0/1. The outbound interface of this router reaching 10.0.0.1 is Ethernet0/0/0. The outbound interface of this router reaching 10.0.2.2 is Ethernet0/0/0. The outbound interface of this router reaching 10.0.2.2 is Ethernet0/0/1.

Which of the following statements about the main function of the router is wrong? (Multiple choice). Guide data forwarding according to the routing table. Build routing tables through multiple protocols. Realize mutual communication between devices on the same network segment. Forward according to the source IP address of the received data packet.

If the Ethernet data frame Length/type=0x0806, which of the following statements is correct? (Multiple choice). The destination MAC address of this data frame may be FFFF-FFFF-FFFF. The source MAC address of this data frame must not be FFFF-FFFF-FFFF. This data frame is an IEEE 802.3 frame. This data frame is an Ethernet II frame.

In the network shown in the figure, which of the following descriptions is correct? (Multiple choice). The network between RTA and SWC is the same collision domain. The network between SWA and SWB is the same broadcast domain. The network between SWA and SWC is the same collision domain. The network between SWA and SWC is the same broadcast domain.

In the figure below, all the switches have enabled the STP protocol. Assuming that the path cost value of all ports is 200, what is the root path cost value contained in the configuration BPDU message received by the G0/0/4 port of SWD?. 0. 200. 400. 600.

As shown in the figure, the switch uses the default parameters to run STP, which of the following ports will be elected as the designated port?. G0/0/1 port of switch A. G0/0/1 port of HUB. G0/0/2 port of HUB. G0/0/2 port of switch A.

The network administrator has captured a data frame in the network, and its destination MAC address is 01-00-5E-A0-B1-C3. Which statement about the mac address is correct?. It is a multicast MAC address. It is a unicast MAC address. It is an illegal MAC address. It is a broadcast MAC address.

As shown in the figure below, if all hosts can communicate normally, which is the correct relationship between MAC addresses and ports in the MAC address table of SWB?. MAC-A G0/0/1 MAC-B G0/0/2 MAC-C G0/0/1. MAC-A G0/0/2 MAC-B G0/0/2 MAC-C G0/0/3. MAC-A G0/0/1 MAC-B G0/0/2 MAC-C G0/0/3. MAC-A G0/0/1 MAC-B G0/0/1 MAC-C G0/0/3.

LACP protocol priority as shown in the figure, switch A and switch B adopt LACP mode link aggregation, and all interfaces are added to the link aggregation group, and the maximum number of active ports is set to 3, which port of switch A is not active port?. G0/0/0. G0/0/1. G0/0/2. G0/0/3.

Which of the following stages is not included in the process of PPPoE session establishment and termination?. Discovery phase. Data Forwarding Phase. Session phase. Session termination phase.

Which of the following parameters should be considered when electing the root port in STP? (Multiple choice). The mac address of the port. Port priority. Port slot number, such as G0/0/1. The cost of the port reaching the root switch. Duplex mode of the port.

In the network shown in the figure below, the router uses a sub-interface as the host gateway. The gateway IP address is 10.0.12.2. Which of the following commands can achieve this requirement? (Multiple choice). interface GigabitEthernet0/0/0.20 dot1q termination vid 10 Ip address 10.0.12.2 255.255.255.0 arp broadcast enable #. interface GigabitEthernet0/0/0.10 dot1q termination vid 10 Ip address 10.0.12.2 255.255.255.0 arp broadcast enable #. interface GigabitEthernet0/0/0.20 dot1q termination vid 20 Ip address 10.0.12.2 255.255.255.0 arp broadcast enable #. interface GigabitEthernet0/0/0.10 dot1q termination vid 20 Ip address 10.0.12.2 255.255.255.0 arp broadcast enable #.

Which of the following statements about the election of the active end in link aggregation LACP mode is correct? (Multiple choice). Compare interface numbers. The one with the smaller priority value is preferred. If they are the same, compare the device MAC, the smaller the better. The device with a small system priority value is used as the active end. The device with a small MAC address acts as the active end.

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

The IP addresses of the VLANIF interfaces of the same switch cannot be the same. True. False.

Which of the following commands configures the authentication mode as HWTACAS authentication?. authentication-mode hwtacacs. authentication-mode none. Authorization-mode hwtacacs. Authorization-mode local.

The host must go through NAT when using the IP address 192.168.1.2 to access the Internet. True. False.

Layer 2 ACL can match source MAC, destination MAC, source ip, destination IP and other information. True. False.

Which of the following statements about the S field in the MPLS packet header is correct? (Multiple choice). The S bit exists in each MPLS packet header. It is used to mark whether there are other labels after this label, 0 means yes, 1 means no. The S bit is only 1 bit in the frame mode and 2 bits in the cell mode. It is used to mark whether there are other labels after this label, 1 means yes, 0 means no.

Among the configurations in the following options, which ones belong to the Layer 2 ACL? (Multiple choice). rule 25 permit source 192.168.1.1 0.0.0.0. rule 10 permit 12-protocol arp. rule 25 permit source-mac 0203-0405-0607. rule 25 permit vlan-id 100.

The administrator has configured the Router as shown in the figure, so what kind of IP address can a host connected to the G1/0/0 interface of the router obtain through DHCP?. The IP address obtained by the host belongs to the 10.10.10.0/24 network. The IP address obtained by the host belongs to the 10.20.20.0/24 network. The IP address obtained by the host may belong to the 10.10.10.0/24 network or the 10.20.20.0/24 network. The host cannot obtain the address.

A DHCP server is deployed in the network, but the administrator finds that some hosts have not correctly obtained the address specified by the DHCP server. What are the possible reasons? (Multiple choice). Some hosts cannot communicate with the DHCP server normally, and the client systems of these hosts automatically generate addresses within the range of 172.254.0.0. There is another DHCP server with higher working efficiency in the network. Some hosts cannot communicate with the DHCP server normally, and the client systems of these hosts automatically generate addresses within the range of 169.254.0.0. The address pool of the DHCP server has been fully allocated.

What is the IEEE802.11 standard corresponding to Wi-Fi6?. IEEE802.11au. IEEE802.11ac. IEEE802.11ax. IEEE802.11at.

WiFi6 actually refers to the IEEE802.11ax standard. True. False.

Which WLAN security policies support the open link authentication method? (Multiple choice). WPA2-802.1X. WPA. WPA2-PSK. WEP.