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H3C GB0-391 Exam Syllabus Topics:

H3C Constructing Secure optimized WANs v2.0 Sample Questions:

Question 1

IP OVER IP of GRE encapsulation, the IP protocol number used ________ marking GRE header

Question 2

Compared with IKE main mode, which of the following advantages does IKE aggressive mode have ?

A. IKE aggressive mode is more secure than main mode
B. adopted by IKE aggressive mode can provide a speed negotiation
C. IKE aggressive mode can provide authentication
D. In the case that both parties in communication can know the IP address of the initiator in advance and need to use the pre-shared key, the aggressive mode can be used

Question 3

The factors that affect VoIP voice quality include ____ .

A. selected by signaling type
B. back sound
C. selected encoding type used
D. Packet loss on IP network

Question 4

Which of the following descriptions of the traditional telephone system is correct is ____ .

A. electrically telephone ringing tone by the remote PBX providing a voltage or central office switches completed, the dial tone is provided by the telephone set voltage accomplished.
B. electrically telephone subscriber loop connected by the PBX or central office switches, are connected to the telephone subscriber loop and the PBX a line between the pair, including tip and Ring , wherein Tip ground, Ring then PBX negative electrode.
C. electrical telephones and facsimile machines belong to the FXS ordinary telephone devices can be connected to a central office switch via an ordinary telephone line FXO interface.

Question 5

Which of the following components is made up of the DiffServ model ?

A. DS District ( Different Service Region )
B. DS boundary nodes ( DS Boundar Nodes )
C. DS domain ( Differentiated Service Domain )
D. Non- DS domain
E. edge border links and internal links
F. the DS inner portions node ( the DS Interior Nodes )

Solutions: