GB0-372-ENU 無料問題集「H3CSE-RS-SW」

（A）Status refresh

（B）Flooding, pruning, grafting

（C）Neighbor Discovery

（D）Assertions

（E）Switch from RPT to SPT

（A）JoinAll

（B）Leave

（C）JoinEmpty

（D）LeaveEmpty

（E）Empty

（F）LeaveAll

（G）Join

（A）The HDLC protocol can be encapsulated on a synchronous link or an asynchronous link.

（B）When the CE1/PRI interface uses the CE1/PRl working mode, it is physically divided into 32 times queues, numbered 0 to 31, among which time slot 0 is used to transmit synchronization information.

（C）The HDLC protocol only supports point-to-point links, not point-to-multipoint links.

（D）When the CE1/PRI interface uses the E1 working mode, it is equivalent to an interface with no time slot division and a data bandwidth of 2Mbps. Its characteristics are the same as those of the synchronous serial port. It supports data link layer protocols such as PPP, frame relay, LAPB and X.25, and network protocols such as IP and IPX.

（A）[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

（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),10,20
VLAN permitted: 1(default vlan),2-4094 Trunk port encapsulation: IEEE 802.1q

（C）[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), 10, 20
VLAN permitted: 1 (default vlan), 2-4094 Trunk port encapsulation: IEEE 802.1q

（D）[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

（A）BPDU protection is configured in the protected port view

（B）An edge port without BPDU protection configured will become a non-edge port after receiving a BPDU.

（C）B PDU protection is configured in system view

（D）After configuring BPDU protection, the edge end will be closed when receiving BPDU

（A）This command is used when RSTP switches and MSTP switches are interconnected.

（B）This command is used when switches from different manufacturers are interconnected and MSTP is running to check summary information.

（C）This command is used when the switch port running RSTP or MSTP is connected to the STP device.

（D）By running this command on a port of an RSTP or MSTP switch, you can switch the spanning tree mode of the port to STP.

（A）BSR is generated through an automatic election process between C-BSRs

（B）C-RP routers periodically send announcement messages in multicast mode

（C）When C-BSR is elected, the priority is compared first, and then the IP address of the bootstrap message is compared.

（D）After receiving the C-RP announcement message, the BSR calculates the RP to be selected for each multicast group based on the relationship between the RP and the multicast group, and multicasts the calculation result.

（A）DR election is only required when there are multiple routers connected to the shared network segment on the receiver side and the routers are running IGMPV1.

（B）The DR on the multicast source side is responsible for sending registration messages to the RP

（C）The DR on the multicast source side must run IGMP, otherwise the receivers on the receiver side cannot receive the multicast traffic.

（D）The DR on the receiver side is responsible for sending a join message to the RP

（A）IST is a fragment of CIST in the MST region. The root of IST is the bridge with the highest priority in the MST region.

（B）The root of IST is the bridge closest to the total root in IST

（C）An MST region can contain multiple MSTI instances, and different MST regions can contain different MSTI instances.

（D）An MSTI instance can map multiple VLANs, and the VLAN mapping relationships in different MST regions can be different

（A）SSH uses additional encryption technology to ensure login security

（B）SSH and Secure Shell can use DES authentication to ensure data security

（C）SSH uses TCP port 22 to transmit data and port 23 to establish a connection

（D）SSH can also provide a secure transmission channel for FTP

（A）The destination IP address of the member report message is the same as the group address in the message

（B）The destination IP address of the general group query message is 224.0.0.1, and the group address field in the message is 0.0.0.0

（C）The destination IP address of the member Leave message is the same as the group address in the message

（D）The destination IP address of the specific group query message is the same as the group address in the message

（A）If the bridge priority of SWD is set to 0, the role of port E0/1 of SWA will change from designated port to root port, and the port will maintain the Forwarding state during the change.

（B）If the cost value of the SWD port E0/2 link is changed to 100, port E0/2 will immediately become the new root port and enter the Forwarding state.

（C）SWD port E0/1 will change from a designated port to a root port in the Listening state.

（D）If the bridge priority of SWD is set to 0, the ports E0/1 and E0/2 of SWD will enter the Forwarding state after the Listening state and the Learning state.

（A）Network layer

（B）Application layer

（C）Infrastructure layer

（D）Session Layer

（A）After the loop protection function is enabled, when the BPDU stored on the port ages, the loop protection takes effect.

（B）If the role of the root port changes, it will change to the Discarding state and will not forward messages, so as not to form a loop in the network. The Discarding state will be maintained until the port receives a BPDU again and becomes a root port again.

（C）Link blocking or one-way link may cause loops

（D）In MSTP, this function is valid for root ports, alternate ports, and backup ports.

（A）GigabitEthernet2/0/1 is the edge port of RRPP sub-ring 2

（B）GigabitEthernet2/0/4 is the edge port of RRPP sub-ring 3

（C）SWB is connected to 3 sub-rings

（D）SWB is the transit node of RRPP sub-ring 2

（A）RT1 outbound interface list: Port2, Port3

（B）RT1 inbound interface list: Port1

（C）RT2 inbound interface list: Port1

（D）RT2 outbound interface list: Port2, Port3

（A）The port duplex mode changes

（B）Broadcast Storm

（C）The end rate changes

（D）MAC address learning error

（A）EVPN Update

（B）LLDP

（C）RARP

（D）STP