GB0-371-ENU試験無料問題集「H3C Constructing H3C High-Performance Campus Networks 認定」

A. The definition of the Flags field in the MSTI configuration message is exactly the same as the definition of the Flags field in the RST BPDU

B. The length of the root ID field of the MST region is 48 bytes, the upper two bytes are the bridge priority level, the value range is 0-61440, the step length is 4096

C. The same link can have different port path costs in different MSTIs

D. The MSTI regional root ID is the ID of the bridge with the highest priority in MSTI

A. When the SWB port E0/2 is down, the SWD port E0/2 will become the new root port and immediately enter the forwarding state

B. When the SWB port E0/2 is down, the SWD port E0/2 will wait 3 Hello Time before it becomes the new root port and enters the forwarding state

C. SWD will have a port role as Alternate

D. Because SWB and SWC do not enable spanning tree protocol, when the root port of SWD is down, the alternate port cannot immediately become the new root port and enter the forwarding state

A. POE usually uses mid-span and end-span power supply methods

B. Usually PSE can support two methods of mid-span and end-span, PD can only support one

C. The POE system includes two parts: PSE equipment and PD equipment, where PD is the power supply device, and PSE is the power receiving device

D. The voltage provided by the POE power supply is 48V, and the output power usually does not exceed 13W

A. SuperVLAN technology

B. Use port Hybrid attributes

C. Port isolation technology

D. Isolate-user-vlan technology

A. AIternate port will neither send configuration BPDU nor TCNBPDU

B. Configuration BPDUs are usually only sent periodically by the root bridge, and TCNBPDUs may be sent by other bridges except the root bridge.

C. The configuration BPDU is usually received only from the root port, and the TCNBPDU is only received from the designated port

D. Configure BPDUs to be sent only from the designated port, and TCNBPDUs to be sent only from the root port

A. As shown in the figure, when SWB is connected to another switch SWD running RSTP, SWB will send RSTBPDU with TC set

B. As shown in the figure, when SWB is connected to another switch running RSTP, SWD will send RSTBPDU with TC set.

C. When the link between SWB and SWC is down, both SWB and SWC will send RST BPDU with TC set

D. When SWC edge port E0/1 is connected to a PC, SWC will send RST BPDU with TC set

A. [SWA]display interface Ethernet 1/0/3 Ethernet1/0/3 current state: UP ...... PVID: 1 Mdi type: auto Link delay is 0(sec) Port link-type: trunk VLAN passing: 1 (default vlan), 2 VLAN permitted: 1 (default vlan), 2-4094 Trunk port encapsulation: IEEE 802.1q

B. [SWA]display interface Ethernet 1/0/3 Ethernet1/0/3 current state: UP ...... PVID: 1 Mdi type: auto Link delay is 0(sec) Port link-type: trunk VLAN passing: 1 (default vlan), 2 VLAN permitted: 1 (default vlan), 2-9, 11-4094 Trunk port encapsulation: IEEE 802.1q

C. [SWA]display interface Ethernet 1/0/3 Ethernet1/0/3 current state: UP ...... PVID: 1 Mdi type: auto Link delay is 0(sec) Port link-type: trunk VLAN passing: 1 (default vlan), 2-3,10 VLAN permitted: 1 (default vlan), 2-4094 Trunk port encapsulation: IEEE 802.1q

D. [SWA]display interface Ethernet 1/0/3 Ethernet1/0/3 current state: UP ...... PVID: 1 Mdi type: auto Link delay is 0(sec) Port link-type: trunk VLAN passing: 1 (default vlan), 2-3 VLAN permitted: 1 (default vlan), 2-9, 11-4094 Trunk port encapsulation: IEEE 802.1q

A. Data frames with VLAN20 tags will be discarded when they enter port Ethernet1/0/2

B. The only VLANs existing on the switch are VLAN1 and VLAN10

C. Data frames with VLAN1 tags will not be stripped off when they leave port Ethernet1/0/2

D. Port Ethernet1/0/2 only allows data from VLAN 1 and VLAN 10 to pass through

A. All interconnection addresses of the three switches are mutually reachable

B. Among the 6 interconnected addresses, at least two interconnected addresses are mutually unreachable

C. Two of the three switches cannot establish OSPF neighbor relationships

D. Three switches can establish OSPF neighbor relationships in pairs

A. SNMP engine includes scheduler, message processing subsystem, security subsystem and access control subsystem

B. SNMP Manager either has a command generator or an instruction receiver

C. An SNMP entity may be both SNMP Manager and SNMP Agent

D. SNMP application includes command generator, command responder, instruction generator, proxy forwarder, etc.

A. TC protection is configured in the system view

B. The system monitors whether the number of TC-BPDU packets received during this time period is greater than the threshold. If it is greater than the threshold, the device will delete the address table entry again after the time expires, so as to avoid frequent deletion and forwarding Address table entry

C. After the TC protection function is enabled, within 10 seconds after receiving the TC-BPDU message, the device allows the number of address table item deletion operations immediately after receiving the TC-BPDU message can be controlled by the user

D. After the switch receives the TC-BPDU message, it will delete the MAC address table entry

A. Deploy endpoint access defense

B. Add IAS equipment (IllegalAccess System)

C. Portal authentication

D. Add firewall