Huawei HCIE-Datacom V1.0 認定 H12-891_V1.0-ENU 試験問題:

1. When you deploy LLQ, you need to configure bandwidth parameters, what is the significance of bandwidth parameters? (Single choice questions).

A) It represents a reference CIR to calculate the burst size D of the built-in tactician token bucket Changing parameters is an option because LLQ always takes precedence over other queues
B) The parameter should be as small as possible. It means that the bandwidth is always preserved, and even if the LLQ is set, changing the parameters will reduce the available bandwidth of the interface
C) Provides a built-in policer to limit the maximum available bandwidth of a low-latency queue during congestion

2. As shown in the figure, three switches S1, SW, and SN3, where SWI is the root bridge, and link congestion occurs between SI and SW2, SWD cannot receive the configuration BPDU sent by the root bridge, which spanning tree protection mechanism does the administrator need to configure to prevent the problem caused by link congestion? (Single choice questions).

A) root protection
B) BPDU Protection
C) PreventS TC-BPDU attacks
D) Loop Protection

3. Dual-bucket, two-speed is used in traffic governance, where the number of tokens in a C bucket is TC and the number of tokens in a P bucket is TP.
When a message of length B enters, which of the following sentences is correctly described? (Multiple choice questions).

A) If TP-B >O and TC-B > 0, the message is marked as a green
B) If TP-B>0 and TC-B < 0, the message is marked yellow
C) If TP-B<0 and TC-B-0, the message is marked in red
D) If TP-B~O and TC-B < 0, the message is marked green

4. What's wrong about vrrp timers is?

A) By default, the time period for VRRP advertisement messages is 2 seconds
B) MASTER DOWN = (3*ADVER_ INTERVAL) + Skew_ time
C) By default, the VRRP preemption delay is I seconds
D) Skew Time= (255-Priority)/255

5. The following statement about the security alliance SA in IPSec is incorrect

A) IPSec only supports encrypting data using symmetric encryption algorithms.
B) A two-way SA must exist between IPSec peers to establish an IPSec VPN connection
C) Use the display ipsec command to view the encryption algorithm used with another IPSec peer, the traffic of interest, and so on.
D) SA is uniquely identified by a triple that includes the security parametric reference SPI (Security Parameter Inder), the source IP address, and the security protocol number (AH or ESP)

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