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H3CSE-RS-SW Sample Questions:

1. The multicast IP address is 229.130.130.1, which of the following is its corresponding multicast MAC address?

A) 00-00-5E-02-82-01
B) 00-00-5E-82-82-01
C) 01-00-5E-02-82-01
D) 01-00-5E-82-82-01

2. Which of the following about IGMP Snooping is correct? (Multiple choice)

A) You can enable the unknown multicast group discard function on the switch. When the switch receives an unknown multicast data packet, it only forwards it to its router port and does not broadcast it within the VLAN.
B) You can configure both IGMP and IGMP Snooping in the same VLAN.
C) Port fast leave means that when the switch receives an IGMP Leave message, it directly deletes the port from the corresponding forwarding table entry's outbound port list
D) Enabling IGMP Snooping on a Layer 2 device will allow you to create and maintain multicast forwarding entries at the data link layer, thereby forwarding multicast data normally at the data link layer.

3. Regarding the configuration of timers in the spanning tree protocol, which of the following is correct? (Multiple choice)

A) HelloTime should be adjusted to the maximum value and Forward Delay should be adjusted to the minimum value. This can reduce the number of Hello messages in the network and the port can enter the forwarding state as soon as possible.
B) An appropriate Helloinme value can reduce the cost of spanning tree calculation while enhancing the robustness of the spanning tree. A value that is too large or too small will affect the spanning tree calculation and the stability of the network.
C) It is not recommended to manually configure Hello Forward Delay and Max Age. The switch will automatically set a better value for the timer based on the network diameter value.
D) MaxAge should be adjusted to the minimum value, which can shorten the aging time of BPDU and detect link failures in time.

4. In NTP client/server mode, which of the following statements about configuration verification are correct? (Multiple choice)

A) When enabling authentication, you must configure both the authentication key and the trusted key.
Otherwise, authentication cannot be started normally.
B) The client should associate the key with the server to successfully complete the verification.
C) The authentication of the client and server must be consistent, otherwise the clock synchronization will fail.
D) If the client does not enable authentication and the server enables authentication, the client's clock can also be synchronized

5. Regarding the comparison of BPDU formats between RSTP and STP, which of the following statements are correct? (Multiple choice)

A) In the RST BPDU, the P/A flag in the Flags field is used for the root port fast switching mechanism
B) RSTP does not define a separate BPDU type for the topology change process
C) The TCA bit is not used in the topology change process defined by RSTP.
D) In the RST BPDU, all 8 bits of the Flags field have actual meanings

Solutions: