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

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

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

（C）[SWB]display interface Ethernet 1/0/2 Ethernet1/0/2 current state: UP ...... PVID: 1 Mdi type: auto Link delay is 0(sec) Port link-type: trunk VLAN passing: 1 (default vlan), 10,20 VLAN permitted: 1 (default vlan), 2-4094 Trunk port encapsulation: IEEE 802.1q

（D）[SWC]display interface Ethernet 1/0/1 Ethernet1/0/1 current state: UP ...... PVID: 1 Mdi type: auto Link delay is 0(sec) Port link-type: trunk VLAN passing: 1 (default vlan), 10,20 VLAN permitted: 1 (default vlan), 2-4094 Trunk port encapsulation: IEEE 802.1q

（A）The router sends PIM Hello in multicast mode, the destination address is 224.0.0.13

（B）If the remaining routers do not receive the Hello message sent by the DR within the timeout period, a new DR election process is triggered

（C）When there are multiple routers running IGMPV1 on the shared network segment, the DR is elected for the shared network segment through the PIMHello message, and the DR serves as the Querier of IGMP

（D）When the DR is elected, the router with the higher priority of the Hello message will become the DR

（E）If Hello messages have the same priority, the router with the smaller interface IP address will become the DR

（A）If not specified, the root bridge of all instances in the MST region is the root bridge of IST by default

（B）The rootprimary command can be used to specify the first preference in an instance. After the command is specified, the priority of the root bridge cannot be modified

（C）Use the rootsecondary command to specify the backup root bridge in an 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

（D）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

（A）In the case of the same port configuration, Ethernet1/0/6 port is the Unselected port of the aggregation group

（B）In the case of the same port configuration, Ethernet1/0/1 port is the aggregation group Unselected

（C）When the configuration of each port is the same, the Ethernet1/0/7 port is the Unselected port of the aggregation group

（D）When the configuration of each port is the same, SWA randomly selects one port among the six ports Ethem shot 1/0/1 to Ethernet 1/0/6 as the aggregation group UnselectM

（A）If the unicast routes to the multicast source S have the same priority, then S is the route with the smaller Metric value wins

（B）If the priority of the unicast route to the multicast source S is the same, and the metric value of the route to S is also the same, the local interface IP address is the larger one wins

（C）The unicast route with higher priority to multicast source S wins

（D）If the above conditions are equal, the one with the smaller Router ID wins

（A）RT1 incoming interface list: Portl

（B）RT2 incoming interface list: Portl

（C）RT1 outgoing interface list: Port2, Port3

（D）RT2 outgoing interface list: Port2, Port3

（A）RT1

（B）RT2

（C）RT3

（A）If the destination MAC address of the data frame is not the MAC address of the VLAN interface of the switch, the switch will look up the MAC address table and do Layer 2 forwarding in the VLAN

（B）If the destination IP address and source IP address of the data frame are not in the same network segment, the switch will look up the routing table for Layer 3 forwarding

（C）If the destination MAC address of the data frame is the MAC address of the VLAN interface of the switch, the switch will perform Layer 3 forwarding

（D）If the destination IP address and source IP address of the data frame are in the same network segment, the switch will do Layer 2 forwarding

（A）After the RSTP switch receives the configuration BPDU, the calculation and comparison method of the priority vector is the same as that of STP

（B）RSTP follows the way of sending configuration BPDUs in STP, and configuration BPDUs are only sent periodically by the root bridge

（C）In RSTP, a blocked port can respond immediately when it receives a ground-first BPDU

（D）The aging time of RSTBPDU is reduced from Max age to 3 consecutive Hello Time durations

（A）MSTI specifies that the port priority field is 2 bytes in length, including 1 byte of port priority and 1 byte of port number

（B）MSTI specifies that the bridge priority field has a length of 8 bytes, including two bytes of bridge priority and 6 bytes of bridge MAC address

（C）If the switch is not configured with VLAN to instance mapping, MSTBPDU will not carry any MSTI configuration message

（D）The MSTI calculation process will use the timer value in RSTBPDU instead of carrying the timer parameter in each MSTI configuration message

（A）If there is a corresponding (S, G) entry in the multicast forwarding table, and the interface actually reached by the packet matches the inbound interface in the entry, the router forwards the multicast data

（B）If the corresponding (S, G) entry does not exist in the multicast forwarding table, the router discards the multicast data

（C）If there is a corresponding (S, G) entry in the multicast forwarding table, but the interface that the packet actually reaches does not match the inbound interface in the entry, the router discards the multicast data

（D）If the multicast data RPF interface does not match the inbound interface in the (S, G) entry, the router will update the inbound interface of the entry to the checked RPF

（A）RTA is the master router of the backup group

（B）RTA and RTB are both in VRRP Master state

（C）RTA and RTB cannot elect the master router of the backup group

（D）RTB is the master router of the backup group

（A）interfaceEthernet1/0/3 port link-type hybrid port hybrid vlan 1 untagged

（B）interfaceEthernet1/0/1 port access vlan 10

（C）interfaceEthernet1/0/3 port link-type hybrid port hybrid vlan 1 untagged port hybrid pvid vlan 10

（D）interface Ethernet 1/0/2 port link-type trunk port trunk permit vlan 1

（E）All the above configurations are wrong

（F）interfaceEthernet1/0/1

（G）interface Ethernet 1/0/2 port link-type trunk port trunk permit vlan 1 port trunk pvid vlan 10

（A）All VLANs in the STP network share a spanning tree, and load sharing of different VLANs on Trunk links cannot be realized.

（B）When the topology changes frequently, some ports are often in Blocking state, which may cause long-term network interruption

（C）The port in STP must pass two ForwardDelays from Blocking to Forwarding before data can be sent.

（D）If there are a large number of hosts in the STP network, frequent online and offline of the hosts will generate a large number of TCN BPDUs

（A）TO_IN (Null, G)

（B）TO_EX (A, G)

（C）TO_IN (A, G)

（D）TO_EX (Null, G)

（A）ITolP solution embodies the core idea of SOA

（B）ITolP allows flexible, fast and efficient construction of enterprise intelligent applications, and can quickly adapt to changes in enterprise business processes

（C）SOA solutions require the integration of IT infrastructure and the establishment of a unified IT infrastructure platform based on network technology

（D）SOA is based on the network, eliminates the information gap caused by heterogeneous systems, integrates various services such as storage, security, and multimedia, and realizes the componentization and resourceization of IT infrastructure

（A）Switch SWC, switch SWD, switch SWE can use SmartLink technology to avoid loop

（B）Switch SWC, switch SWD, switch SWE can use MSTP technology to avoid loops

（C）Switch SWC, switch SWD, switch SWE use SmartLink technology, switch SWE uplink switch SWC, switch SWD link will block one

（D）Switch SWC, switch SWD, switch SWE use MSTP technology, switch SWE uplink switch SWC, switch SWD link will block one

（A）After the priority is adjusted, SWA will still send configuration BPDUs with itself as the root.

（B）After SWC receives a low priority configuration BPDU, it will immediately respond to a configuration BPDU with itself as the root

（C）The topology will re-converge after 30 seconds by default

（D）After the configuration BPDU saved locally by the SWB ages, it will send the configuration BPDU rooted to the SWA

（A）Packet filtering

（B）EAD

（C）PortaL certification

（D）RADIUS

（E）802.1X authentication

（A）Assuming that the spanning tree operating mode of SWB and SWC is modified to STP, the Alternate port of SWD can still enter the forwarding state directly after it becomes the new root port

（B）If the SWD port EO/1 is down, the SWD port E0/2 will immediately change from the Alternate port to the new root port

（C）After topology convergence, SWD will have one port as an alternate port

（D）If there are multiple alternate ports on the SWD, when the root port is down, SWD will select the port with the highest priority from these alternate ports as the new root port