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H3C GB0-391 Exam Syllabus Topics:

H3C Constructing Secure optimized WANs v2.0 Sample Questions:

Question 1

In the basic configuration of L2TP in independent LAC mode , the description of the name of the local end of the tunnel is correct.

A. In the L2TP group view, use the Tunnel name name command to configure the local tunnel name
B. default case considered, the name of a tunnel for the name of the system
C. default case considered, the name of a tunnel is empty
D. In the system view, use the Tunnel-name name command to configure the local tunnel name

Question 2

Which statement about RED ( Random Early Detection ) is correct?

A. flat average queue length is less than the minimum discard threshold, less than the maximum discard threshold, packets are dropped randomly
B. The higher the priority of the packet , the lower the drop probability.Which means less discarded
C. flat average queue length is less than the minimum discard threshold, discarding packets not
D. flat average queue length is greater than the maximum discard threshold, packets are dropped randomly
E. In discarded after a congested port

Question 3

Which of the following H.225 messages are used by the called party to indicate the call processing progress status to the calling party ?

A. Progress
B. Alerting
C. Call-proceeding
D. Setup

Question 4

The L2TP session information can be displayed through the ____ command .

A. display 12tp tunnel
B. display 12tp session
C. display 12 tp status
D. display 12t p verbose

Question 5

The correct statement regarding the defense of malformed messages is ______ .

A. abnormal shaped packet attacks targeted defense needs for each attack
B. needles of ping of death attacks by detecting sensing Ping whether the request packet over a length of over 65536 bytes to discriminate whether the attack packets, if the length exceeds 65536 bytes, the packet will be discarded.
C. needle for Teardrop , information may be cached fragment attack by class, each source, the purpose of the IP , the packet ID the same set of configuration, the maximum cache 10,000 groups , the data in the buffer reaches a maximum when directly discards fragmented, while According to the cached fragmentation information, analyze the legitimacy of IP packet segmentation, and directly discard illegal IP packets to resist attacks
D. needle deformity TCP packet attack, by determining TCP determines whether the packet is a packet attack packet flag for .6 flag bits are all 1 or .6 flag bits are all is 0 or SN and FIN simultaneously It is a packet discards

Solutions: