FREE PDF QUIZ HUAWEI - ACCURATE EXAMCOLLECTION H12-821_V1.0 VCE

Free PDF Quiz Huawei - Accurate Examcollection H12-821_V1.0 Vce

Free PDF Quiz Huawei - Accurate Examcollection H12-821_V1.0 Vce

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Huawei HCIP-Datacom-Core Technology V1.0 Sample Questions (Q77-Q82):

NEW QUESTION # 77
IGMP group entries play an important role in multicast forwarding. An administrator runs a command to view information about a multicast entry. The information is as follows:
sql
Copy
<HUAWEI> display igmp group
Interface group report information
Vlanif100(10.1.6.2):
Total 1 IGMP Group reported
Group Address Last Reporter Uptime Expires
225.1.1.2 10.1.6.10 00:02:04 00:01:17
Given this, which of the following statements are true?

  • A. This entry can be used to construct the corresponding (S, G) entry.
  • B. Expires indicates the aging time of the IGMP group.
  • C. 225.1.1.2 is the address of the group that the user joins.
  • D. This entry is created when the device receives an IGMP Join message from a user.

Answer: B,C,D

Explanation:
Comprehensive and Detailed Step-by-Step Explanation:
1. Understanding the IGMP Group Entry:
The IGMP group entry contains key information about multicast groups on the interface:
* Group Address (225.1.1.2): The multicast group address that the user has joined.
* Last Reporter (10.1.6.10): The IP address of the last host that sent an IGMP Report message for this group.
* Uptime: The duration since the group was first reported.
* Expires: The remaining time before the group entry ages out if no further reports are received.
2. Analysis of Each Statement:
Option A: This entry can be used to construct the corresponding (S, G) entry.
* Incorrect.
* This is a group entry for IGMP, which contains information about the group (G) but does not include a specific source (S). (S, G) entries are created in PIM (Protocol Independent Multicast), not IGMP.
Option B: This entry is created when the device receives an IGMP Join message from a user.
* Correct.
* IGMP Join messages are used by hosts to signal their intent to join a multicast group. When such a message is received, the group entry is created.
Option C: Expires indicates the aging time of the IGMP group.
* Correct.
* The "Expires" field shows the remaining time before the group entry ages out if no further IGMP reports are received.
Option D: 225.1.1.2 is the address of the group that the user joins.
* Correct.
* The "Group Address" field explicitly states that 225.1.1.2 is the multicast group that the user has joined.
3. Summary:
* Correct Options: B, C, D


NEW QUESTION # 78
In IPv6, NDP (Neighbor Discovery Protocol) uses multiple types of ICMPv6 packets. Which of the following functions are RS (Router Solicitation) packets used for?

  • A. Duplicate address detection
  • B. Redirection
  • C. Address resolution
  • D. Prefix readdressing

Answer: C

Explanation:
Comprehensive and Detailed In-Depth Explanation:
* Neighbor Discovery Protocol (NDP) replaces ARP in IPv6 and uses ICMPv6 messages for:
* Router Solicitation (RS) # Sent by hosts to request Router Advertisement (RA) messages.
* Router Advertisement (RA) # Sent by routers to announce prefixes and network parameters.
* Neighbor Solicitation (NS) # Used for address resolution and Duplicate Address Detection (DAD).
* Neighbor Advertisement (NA) # Sent in response to NS messages.
* Redirect # Used by routers to redirect hosts to better gateways.
* RS is not directly used for address resolution; Neighbor Solicitation (NS) does this, so the answer should be D.
# Reference: Huawei HCIA-Datacom Study Guide, NDP and ICMPv6 Packet Types.


NEW QUESTION # 79
Which of the following statements is false?

  • A. If the current DR fails, the current BDR automatically becomes a new DR, and a BDR will be elected again.
  • B. When a router with the highest router priority joins an OSPF network, this router will become the new DR.
  • C. A device with a higher router priority has a higher election priority.
  • D. If two devices have the same router priority, the device with a larger router ID has a higher election priority.

Answer: A


NEW QUESTION # 80
GRE is a VPN encapsulation technology that is widely used to transmit packets across heterogeneous networks. Which of the following statements is false about GRE?

  • A. GRE supports encryption and authentication.
  • B. GRE supports multicast transmission.
  • C. GRE is a Layer 3 VPN encapsulation technology.
  • D. GRE can work with other VPN protocols to better ensure data security.

Answer: A

Explanation:
GRE Characteristics
* GRE does not inherently support encryption or authentication. It is a tunneling protocol for encapsulating packets, and data security features must be implemented using other protocols such as IPsec.
* Other correct attributes of GRE include:
* B. Supports multicast transmission.
* C. Acts as a Layer 3 VPN encapsulation technology.
* D. Can work with VPN protocols like IPsec for better security.
HCIP-Datacom-Core Reference
* GRE features and limitations are discussed in VPN encapsulation technology chapters.


NEW QUESTION # 81
To enable PC1 to access PC2 using the IP address of the firewall's GE0/0/2, you need to configure NAPT for source address translation. In the following figure, fill in the blank to complete the command.

Answer:

Explanation:

Explanation:
pat
trust
12.1.1.0
inner


NEW QUESTION # 82
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