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Exam Overview
Exam Code GB0-392
Exam Name H3C Constructing Secure Optimized WANs
Vendor H3C
Total Questions 299
Last Updated 07-Nov, 2026
Free GB0-392 Questions Get Premium Access
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Free GB0-392 Practice Questions

Explore 7 free practice questions for the H3C GB0-392 exam and review the answers and explanations to support your preparation.

  1. Question 1

    Multiple answers

    Which of the following functions are provided on the access layer?

    • Option A:

       A large amount of interfaces are provided for interconnection among computers of end users.

      Correct
    • Option B:

      Access security control

      Correct
    • Option C:

      High-speed packet switching

      Correct
    • Option D:

      Complex routing policy

      Correct
    Show Answer & Explanation Hide Answer & Explanation

    Correct Answer: A, B

  2. Question 2

    Single answer

    When the link type of the ONU port is Trunk, the downlink packet processing mode is ______.

    • Option A:

      Only packets without tags can pass through the port, and default VLAN tags are added to the packets.

      Correct
    • Option B:

      Only packets with default VLAN tags can pass through the port and the tags will be removed.


      Correct
    • Option C:

      For packets without tags, the port adds default VLAN tags to the packets. For packets with tags, the port directly forwards the packets.

      Correct
    • Option D:

      Only packets with tags can pass through the port.

      Correct
    Show Answer & Explanation Hide Answer & Explanation

    Correct Answer: D

  3. Question 3

    Multiple answers

    The VPN can be classified into ______ types according to the operation mode.

    • Option A:

      Intranet VPN

      Correct
    • Option B:

      Internet VPN

      Correct
    • Option C:

      CPE-Based VPN

      Correct
    • Option D:

      Network-Based VPN

      Correct
    Show Answer & Explanation Hide Answer & Explanation

    Correct Answer: C, D

  4. Question 4

    Single answer

    When an L2TP header is encapsulated to a PPP frame, correct Tunnel ID and Session ID are marked to identify the tunnel and session attributes.

    The Tunnel ID in the L2TP header is allocated by ______, and Session ID is allocated by ______.

    • Option A:

      Local LAC, local LAC

      Correct
    • Option B:

      Peer LNS, peer LNS

      Correct
    • Option C:

      Local LAC, peer LAC


      Correct
    • Option D:

      Peer LAC, local LAC


      Correct
    Show Answer & Explanation Hide Answer & Explanation

    Correct Answer: B

  5. Question 5

    Single answer

    For L2TP networking, user authentication methods of LNS include ______.


    • Option A:

      Proxy authentication


      Correct
    • Option B:

      Forced CHAP authentication

      Correct
    • Option C:

      IPCP renegotiation

      Correct
    • Option D:

      LCP renegotiation

      Correct
    Show Answer & Explanation Hide Answer & Explanation

    Correct Answer: D

  6. Question 6

    Single answer

    Which of the following commands is used to clear an established IKE security tunnel?

    • Option A:

      reset ike

      Correct
    • Option B:

      reset ike tunnel

      Correct
    • Option C:

      reset ipsec sa

      Correct
    • Option D:

      reset ike sa

      Correct
    Show Answer & Explanation Hide Answer & Explanation

    Correct Answer: D

  7. Question 7

    Multiple answers

    A packet captured between two remote routers consists of an IP header, an ESP header, and encrypted data. The packet may experience ______.

    • Option A:

      GRE over IPSec, IPSec adopts the transmission mode.

      Correct
    • Option B:

      GRE over IPSec, IPSec adopts the tunnel mode.

      Correct
    • Option C:

      IPSec over GRE, IPSec adopts the transmission mode.

      Correct
    • Option D:

      IPSec over GRE, IPSec adopts the tunnel mode.

      Correct
    Show Answer & Explanation Hide Answer & Explanation

    Correct Answer: A, B