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H3C GB0-372-ENU Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: H3C Switch Operations and Management | - Troubleshooting
|
| Topic 2: Layer 3 Switching | - IRF (Intelligent Resilient Framework)
|
| Topic 3: High Availability Technologies | - VRRP
|
| Topic 4: Switching Technology Fundamentals | - STP/RSTP/MSTP
|
H3CSE-RS-SW Sample Questions:
Regarding the relationship between RSTP and STP, which of the following is correct statement?
- A. RSTP can realize load sharing of data from different VLANs on Trunk links based on STP.
- B. RSTP has all the functions of STP, but it only uses one type of BPDU
- C. 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.
- D. Switches running RSTP can work together with switches running STP and improve the convergence time of STP.
Which of the following statements about the designated bridge of STP is correct?
- A. When determining the designated bridge, the bridge ID is compared first. The bridge with the smallest bridge ID is the designated bridge on the Physical Segment.
- B. In STP, only the root bridge will generate and send configuration BPDUs, and the designated bridge will not actively send configuration BPDUs.
- C. The designated bridge in STP is not global and only makes sense on one Physical Segment
- D. Except for the root port pointing to the root bridge, all other ports on the designated bridge are designated ports.
Which of the following statements about the BPDU format of MSTP is correct? (Multiple choice)
- A. The length of the MST region root ID field is 48 bytes. The high-order two bytes are the bridge priority level. The value range is 0-61440 with a step length of 4096.
- B. The MSTI domain root ID is the ID of the bridge with the highest priority in the MSTI.
- C. The port path cost value of the same link can be different in different MSTIs
- D. 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
Contrast the calculation convergence of RSTP and STP. Which of the following statements is correct? (Multiple choice)
- 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, RSTP defines a fast switch mechanism for the root port, so that the port connected to the host can quickly enter the forwarding state
- C. 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.
- 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.
The figure shows the networking application of RRPP. The customer LAN switches SWA, SWB, SWC, and SWD form the RRPP ring main ring 1, and the switches SWB, SWC, and SWE form the sub-ring 2.
If the switching SWE is the master node of sub-ring 2, which of the following can be known from the above information?
- A. If the link between switch SWB and switch SWC is down, switch SWE will release the secondary port
- B. If the link between switch SWA and switch SWB is down, and the link between switch SWB and switch SWC is down, switch SWE will release the secondary port.
- C. If the link between switch SWA and switch SWB is down, and the link between switch SWA and switch SWD is down, switch SWE will release the secondary port.
- D. If the link between switch SWA and switch SWB is down, switch SWE will release the secondary port
