GB0-372-ENU 無料問題集「H3CSE-RS-SW」

（A）If STP wants to shorten the convergence time, it can only configure a shorter FORWARD Delay time, but this will affect the stability of the network.

（B）Compared with STP, STP defines a fast switch mechanism for root ports, which allows Altemate to quickly become the new root port when there is a port failure.

（C）Compared with STP, RSTP defines a fast switch mechanism for the root port, so that the port connected to the host can quickly enter the forwarding state

（D）Compared with STP, RSTP defines a fast switch mechanism for designated ports, which allows the designated port to enter the forwarding state without waiting for twice the Forward Delay time.

（A）The backup group vrid is 5

（B）The backup group vrid is 4

（C）The backup group uses real MAC mode

（D）Backup group uses virtual MAC mode

（A）The PCC message comes out of SWB's Ethernet 1/0/4 port and enters SWA's Ethernet 1/0/3 port.
The VLAN tag it carries is VLAN 2.

（B）The PCC message comes out of SWB's Ethernet 1/0/4 port and enters SWA's Ethernet 1/0/3 port.
The VLAN tag it carries is VLAN 1.

（C）The PCC message comes out of SWB's Ethernet 1/0/4 port and enters SWA's Ethernet 1/0/3 port.
The VLAN tag it carries is VLAN 3.

（D）The PCC message comes out of SWB's Ethernet 1/0/4 port and enters SWA's Ethernet 1/0/3 port.
The VLAN tag it carries is VLAN 10.

（A）PCA can communicate with PCC

（B）PCA can communicate with PCB

（C）None of the above answers are correct

（D）PCA can communicate with SWA

（E）PCA can communicate with SWB

（A）Voice VLAN networking model components include IP phones, switches, DHCP servers, software services, and call agents

（B）The switch can mark the data in the Voice VLAN with a higher priority and provide high-priority services

（C）In the Voice VLAN model, the switch is responsible for assigning different VLAN TAGs to different services

（D）There can be two DHCP servers, one in the Voice VLAN and one in the Data VLAN.

（A）The Leaf nodes of the distributed gateway solution can simultaneously undertake VXLANL2/L3 forwarding

（B）The centralized gateway solution is forwarded by Spine according to the IP header of the inner message

（C）Divided into centralized gateway solution and distributed gateway solution

（D）The centralized gateway solution is forwarded by Spine according to the MAC header of the inner message

（A）No congestion control

（B）It can correct the problem of multicast data packets arriving out of order

（C）Best effort delivery, low latency application requirements cannot be guaranteed

（D）Data packets are received repeatedly

（A）Switches running RSTP can work together with switches running STP and improve the convergence time of STP.

（B）RSTP is defined in the old EE802.1 D standard. Its protocol concept is the same as STP, but it has improved the convergence time.

（C）RSTP has all the functions of STP, but it only uses one type of BPDU

（D）RSTP can realize load sharing of data from different VLANs on Trunk links based on STP.

（A）Router1 and Router2 periodically send general group queries to the shared network segment

（B）Only Router1 periodically sends general group queries to the shared network segment

（C）After the host receives the query message, only Client1 sends a Report message

（D）After the host receives the general group query message, Client1 sends a Report message to join group A, which will not suppress Client2's Report message to join group B.

（E）Only Router2 periodically sends general group queries to the shared network segment

（F）After the host receives the general group query message, Client1, Client2, and Client3 may send the same

（A）If the port identification/sending MSTP message mode is configured as dotls, the port only sends and receives MSTP messages in standard format.

（B）If the MSTP message format received by the port is inconsistent with the configured message format, the port will become a designated port and the port status will remain in the Discarding state to prevent loops.

（C）The ports of H3C switches can be configured to automatically identify the format of MSTP messages and determine the format of the messages to be sent based on the identification results.

（D）The stpcompliance command can be used to configure the MSTP compatibility mode of the port. The auto parameter means that the port only sends and receives MSTP messages that are compatible with non-standard formats.

（A）The PC will actively send MAC address messages to the switch regularly

（B）When the switch receives an ARP reply message from a PC, it records the source MAC address.

（C）When a PC in the network sends a data frame, the switch records the source MAC address

（D）The switch regularly sends MAC address detection messages to the PC

（A）Private VLAN is a Layer 2 VLAN technology, so switches that support Private VLAN technology are all Layer 2 switches.

（B）Super VLAN is a three-layer VLAN technology, so the switches that support Super VLAN technology are all three-layer switches.

（C）Super VLAN technology is also called VLAN aggregation. Its main purpose is to solve the problem of IP address waste or insufficient VLAN interface quantity.

（A）First compare the priorities of the C-RPs, and the one with the higher priority wins.

（B）Finally, compare the C-RP addresses, and the one with the smaller value wins.

（C）Compare the hash values calculated by the Hash function again, the one with the larger value wins

（D）Finally, compare the C-RP addresses, and the one with the larger value wins.

（A）After the local proxy ARP function is enabled on the Super VLAN interface, hosts in different Sub VLANs can communicate with each other.

（B）After establishing the mapping relationship between Super VLAN and Sub VLAN, the system will prohibit adding/deleting ports to Sub VLAN and deleting VLANs.Operation

（C）Enabling the local proxy ARP function on the isolate-user-vlan interface allows hosts in different secondary VLANs to communicate with each other.

（D）After establishing the mapping relationship between Isolate-user-vlan and Secondary VLAN, the system will prohibit the operation of adding/deleting ports to Secondary VLAN and deleting VLAN.

（A）In sparse mode, multicast data streams are sent from the multicast source to the multicast receivers in a pull manner, and the multicast receivers actively send reception requests.

（B）Multicast routing protocols have two modes: dense and sparse

（C）In dense mode, multicast data streams are pushed from the multicast source to every corner of the network, and multicast receivers passively receive multicast packets.

（D）Intra-domain multicast routing protocols include: MSDP, DVMRP, MOSPF, PIM

（A）The Smart Link group status of switch SWJ has nothing to do with switch SWH

（B）If the link of switch SWH to switch SWE is down, the primary port of the Smart Link group of switch SWJ will switch to the secondary port.

（C）If the link of switch SWH to switch SWD is down, the master port of switch SWJ Smart Link group will switch to the slave port.

（D）If the links of the upstream switches SWD and SWE of switch SWH are both in Down state, the primary port of the Smart Link group of switch SWJ will be switched to the secondary port.

（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）Determine the router end by listening to IGMPQuery messages and IGMP-Snooping

（B）Layer 2 devices rely on IGMP-sliooping to snoop IGMP messages and maintain multicast address forwarding entries at Layer 2

（C）By listening to IGMPReport messages, IGMP-Snooping adds ports to known multicast groups or creates new multicast forwarding entries

（A）VLAN 3

（B）VLAN 2

（C）VLAN 10

（D）VLAN 1

（E）VLAN 20

（F）VLAN 4