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NEW QUESTION # 69
Which of the following are organizations related to SDN? (Multiple choice)
- A. IETF
- B. SDN Industry Alliance
- C. ONF
- D. ETSI
Answer: A,B,C,D
NEW QUESTION # 70
Regarding the port status and role in RSTP, which of the following is correct? (Multiple choice)
- A. The definitions of root port and designated port in RSTP are the same as those in STP.
- B. In RSTP, the Alternate port is used to back up the root port, and the Backup port is used to back up the designated port.
- C. There are three states for ports in RSTP. After a port enters the Learning state, it starts to send and receive BPDUs and determines the port role.
- D. The Discarding port in RSTP is like the Blocking port in STP. When the port is in the Discarding state, it will not send BPDU, but will receive BPDU.
Answer: A,B
NEW QUESTION # 71
The customer LAN switches SWA, SWB, and SWC form the RRPP ring main ring 1. If switches SWB, SWC, and SWD form sub-ring 2, it can be concluded from the above information that? (Multiple choice)
- A. If switch SWB is a sub-ring edge node, it can initiate a Main-Fault message
- B. If switch SWA is the primary ring master node, it can initiate a Link-Down message
- C. If the switch SWA is the primary ring master node, it can initiate a Health message
- D. If switch SWB is a sub-ring edge node, it can initiate an Edge-Hello message
Answer: C,D
NEW QUESTION # 72
In the network shown in the figure, PIM SM protocol runs between RT1, RT2 and RT3, and the RP is 1.1.1.1. RT3 is connected to a receiver, and IGMP is enabled on the corresponding interface.
View the unicast routing table on RT3
Then, when the receiver sends a group join request, which of the following routers have (*, G) entries?
(Multiple choice)
- A. RT3
- B. RT2
- C. RT1
Answer: A,C
NEW QUESTION # 73
XYZ company's two LANs are located in different regions and are interconnected through the operator's network. The network topology is shown in the figure. Switches SWC and SWD are the company's network edge devices, and switches SWA and SWB are the operator's network edge devices.
Hosts PCA and PCB are located in VLAN2 of the company's network. The operator network assigns VLAN tags to XYZ company's data packets passing through it. Under normal circumstances, the port that needs to enable the Qinq function is? (Multiple choice)
- A. Ethernet 1/o/2 of switch SWA
- B. Ethernet1/0/1 of switch SWB
- C. Ethernet 1/0/2 of switch SWB
- D. Ethernet 1/0/1 of switch SWA
Answer: A,C
NEW QUESTION # 74
For the multicast distribution tree model, which of the following statement is correct? (Multiple choice)
- A. Multicast distribution tree models are divided into two types: SPT and RPT
- B. Each router on the SPT maintains the (S, G) table entry
- C. Different multicast sources use themselves as roots and independently establish RPTs
- D. Each router on the RPT maintains the (*, G) entry
Answer: A,B,D
NEW QUESTION # 75
The figure shows the networking application of RRPP. The customer LAN switches SWA, SWB, SWC, and SWD form the RRPP ring main ring 1, and the switches SWB, SWC, and SWE form the sub-ring 2.
If the switching SWE is the master node of sub-ring 2, which of the following can be known from the above information?
- A. If the link between switch SWB and switch SWC is down, switch SWE will release the secondary port
- B. If the link between switch SWA and switch SWB is down, switch SWE will release the secondary port
- C. If the link between switch SWA and switch SWB is down, and the link between switch SWB and switch SWC is down, switch SWE will release the secondary port.
- D. If the link between switch SWA and switch SWB is down, and the link between switch SWA and switch SWD is down, switch SWE will release the secondary port.
Answer: C
NEW QUESTION # 76
Which of the following statements about MSTP is correct? (Multiple choice)
- A. The basic idea of MSTP is to calculate a spanning tree for each VLAN, and each tree corresponds to a spanning tree instance.
- B. A spanning tree instance in MSTP can contain multiple VLANs
- C. MSTP is defined in 802.1s. It can meet the requirements of fast convergence and load sharing.
- D. In MSTP, a VLAN can be mapped to multiple spanning tree instances as needed.
Answer: C
NEW QUESTION # 77
Switch SWA uses the factory default configuration. Now configure the Ethernet 1/0/1 port of switch SWA as a Trunk port, with PVID of VLAN 20 and allowing VLAN 10.
which of the following is correct? (Multiple choice)
- A. [SWA] vlan10
[SWA-vlan10] quit
[SWA] vlan 20
[SWA-vlan20] port Ethernet 1/0/1
[SWA-vlan20] quit
[SWA ] interface Ethernet 1/0/1
[SWA-Ethernet1/0/1] port link-type trunk
[SWA-Ethernet1/0/1] port trunk permit vlan 10 - B. [SWA] vlan10
[SWA-vlan10] quit
[SWA] vlan 20
[SWA-vlan20] quit
[SWA] interface Ethernet 1/0/1
[SWA-Ethernet1/0/1] port access vlan 20
[SWA-Ethernet1/0/1] port link-type trunk
[SWA-Ethernet1/0/1] port trunk permit vlan 10 - C. [SWA] interfaceEthernet 1/0/1
[SWA-Ethernet1/0/1] port link-type trunk
[SWA-Ethernet1/0/1] port trunk pvid vlan 20
[SWA-Ethernet1/0/1] port trunk permit vlan 10
[SWA-Ethernet1/0/1] quit
[SWA] vlan 10
[SWA-vlan10] quit
[SWA] vlan 20 - D. [SWA] vlan10
[SWA-vlan10] quit
[SWA] vian 20
[SWA-vlan20] quit
[SWA] interface Ethernet 1/0/1
[SWA-Ethernet1/0/1] port link-type trunk
[SWA-Ethernet1/0/1] port trunk pvid vlan 20
[SWA-Ethernet1/0/1] port trunk permit vlan 10
Answer: C,D
NEW QUESTION # 78
Which of the following statements about VXLAN packets are correct? (Multiple choice)
- A. In the VXLAN header, the flag bit has 8 bits
- B. Compared with traditional networks, VNI replaces VLANID to represent different VXLAN networks.
- C. The VXLAN header is encapsulated in the UDP header
- D. The source IP in the IP header of the VXLAN message is the source IP of the VXLAN channel.
Answer: A,B,C,D
NEW QUESTION # 79
Which of the following statements about EVPN are correct? (Multiple choice)
- A. EVPN uses 5 types of routing to advertise MAC/IP and other information
- B. EVPN is implemented by extending lSIS
- C. EVPN VXLAN tunnels are automatically established through type 3 routing
- D. EVPN can automatically generate routing entries based on virtual machine ARP
Answer: C,D
NEW QUESTION # 80
In the network shown in the figure, after completing the corresponding configuration on the switch SWA, when the switch SWA receives the data frame accessing the PCB from the PCA, it determines whether to check the MAC address table or the routing table?
- A. Source MAC address of the data frame
- B. VLAN attributes of data frames
- C. Source MAC address of the data frame
- D. Source IP address of the data frame
- E. Destination MAC address of the data frame
Answer: E
NEW QUESTION # 81
Which of the following statements is correct regarding the designation of the MSTP root bridge?
(Multiple choice)
- A. If not specified, the root bridge of all instances in the MST region is the root bridge of the IST by default.
- B. If multiple backup root bridges are set, when the root bridge fails, the backup root bridge with the smallest MAC address will become the root of the specified MST instance.
- C. The root primary command can be used to specify the preferred root bridge in a certain instance. After the command is specified, the priority of the root bridge cannot be modified.
- D. The root secondary command can be used to specify a backup root bridge in a certain instance.
When the root bridge fails or is shut down, the backup root bridge can replace the root bridge and become the root bridge of the specified spanning tree instance.
Answer: A,B,C,D
NEW QUESTION # 82
Two routers are connected together through a LAN to form a VRRP backup group. The configuration on each interface is as follows:
[RTA-GigabitEthernet1/0] display this
IP address 192.168.0.252 255.255.255.0
Vrrp vrid 1 virtual-ip 192.168.1.254
Vrrp vrid 1 priority 120
[RTB-GigabitEthernet1/0] display this
IP address 192.168.0.253 255.255.255.0
Vrrp vrid 1 virtual-ip 192.168.1.254
What can we learn from the above information?
- A. RTA and RTB are both in VRRP Master state
- B. RTA is the Master router of the backup group
- C. RTB is the Master router of the backup group
- D. RTA and RTB are both in VRRP Initialize state
Answer: D
NEW QUESTION # 83
Regarding the spanning tree port cost configuration of H3C switches, which of the following is correct? (Multiple choice)
- A. H3C switches support three port cost standards: dot1d-1998, dot11, and legacy. The stp pathcost- standard command can be used to switch the port cost standard.
- B. The default spanning tree port cost standard followed by H3C switches is legacy
- C. If switches from different manufacturers are interconnected, the switches should be configured to follow the same port cost standard as much as possible, otherwise the spanning tree calculation results may deviate from the original intention of the network design.
- D. By default, the larger the port cost value, the smaller the port bandwidth
Answer: A,B,C,D
NEW QUESTION # 84
The topology is shown in the figure. Perform STP calculation. Which of the following is correct?
(Multiple choice)
- A. Since the root bridge ID, root path cost, designated bridge ID, and designated port are all the same, the root port of SWD cannot be determined.
- B. If the bridge priority of SWD is set to 0, port E0/2 of SWD will only receive configuration BPDUs instead of sending configuration BPDUs
- C. SWD needs to determine the root port by comparing the ID of the port where it receives the configuration BPDU
- D. If the bridge priority of SWD is set to 0, SWD will become the root bridge, and ports E0/1 and E0/2 will both be designated ports.
Answer: B,C
NEW QUESTION # 85
Switches SWA and SWB are connected together through two optical fiber Gigabit Ethernet links, and the following interface configuration is available on switch SWA:
[SWA] interface GigabitEthernet 1/0/1
[SWA-GigabitEthernet1/0/1] gvrp
[SWA-GigabitEthernet1/0/1] port link-type trunk
[SWA-GigabitEthernet1/0/1] port trunk permit vlan 1 10
[SWA] interface GigabitEthernet 1/0/2
[SWA-GigabitEthernet1/0/2] port link-type trunk
[SWA-GigabitEthernet1/0/2] port trunk permit vlan 1 10
If you want to configure link aggregation to aggregate these two links, if the configuration on SWB is correct, which of the following you can know from the above information?
- A. After link aggregation is configured on SWA and SWB, if both SWA and SWB enable MSTP on the aggregation ports, GigabitEthernet1/0/1 and GigabitEthe1/0/2 can participate in forwarding.
- B. Only when the configuration of GigabitEthe1/0/2 is changed to be consistent with that of GigabitEthe1/0/1, can the two be added to the same aggregation group.
- C. Only when all VLANs are allowed to pass through GigabitEthernet1/0/2 and Gigabit1/0/1, can the two be added to the same aggregation group.
- D. After link aggregation is configured on SWA and SWB, if both SWA and SWB enable MSTP on the aggregation port, one of GigabitEthe1/0/1 and GigabitEthe1/0/2 will be blocked.
Answer: A
NEW QUESTION # 86
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