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Huawei HCIP-Datacom-Core Technology V1.0 Sample Questions (Q271-Q276):

NEW QUESTION # 271
Which of the following statements about multicast packet forwarding is true?

A. The source address of a multicast packet is a unicast address.
B. If a multicast data packet fails the RPF check, the packet must have been received through a sub- optimal interface. However, this interface still receives and forwards the multicast traffic downstream.
C. In multicast transmission, the destination address of a packet can be the unicast address of a host.
D. IGMP snooping cannot control the scope of multicast traffic flooding on a Layer 2 network.

Answer: A

Explanation:
A stateful inspection firewall tracks the state of network connections and only matches the initial packet against its rule set. Subsequent packets in the same connection are matched in the state table. Contrary to this, UDP packets can be inspected by correlating them with connection states, and packets in a single connection are always correlated .

NEW QUESTION # 272
In the VRP, by default, the routes imported by BGP will be automatically summarized.

A. TRUE
B. FALSE

Answer: B

Explanation:
By default, BGP does not automatically summarize imported routes. Route summarization must be explicitly configured using the summary or similar commands .

NEW QUESTION # 273
OSPF has several types of special areas, which are used to reduce the LSDB size and improve device performance.
Which of the following LSAs cannot be in a totally stub area?

A. Type 3 LSA that describes a default route
B. Type 3 specific LSA
C. Type 1 LSA
D. Type 2 LSA

Answer: B

Explanation:
ATotally Stubby Areain OSPF is a special type of stub area where onlyintra-area (Type 1) LSAs,router LSAs, anddefault routes (Type 3 LSA with 0.0.0.0/0)are allowed to be injected. Itblocks inter-area routes (Type 3 LSAs for specific prefixes)andType 5 LSAs (external routes)to reduce the size of the Link-State Database (LSDB) and enhance router performance.
Explanation of the Options:
A: Type 3 specific LSA-#Correct Answer. These LSAs represent inter-area routes. Totally Stubby Areasdo not allow Type 3 LSAs for specific routes, only for the default route (0.0.0.0/0).
B: Type 1 LSA-#Allowed. These are Router LSAs generated by routers within the area and are necessary for OSPF to function.
C: Type 3 LSA that describes a default route-#Allowed. This is the only Type 3 LSA permitted in a Totally Stubby Area. It provides a default route (0.0.0.0/0) to reach external destinations.
D: Type 2 LSA-#Allowed if there are broadcast or NBMA networks in the area. These describe the network segment in multi-access environments and are generated by the DR.
Official Huawei Reference:
#Huawei HCIP-Datacom-Core Technology Study Guide-
Chapter: OSPF Special Areas
"A totally stub area does not allow inter-area Type 3 LSAs or external Type 5 LSAs to enter. Only a default route is injected in the form of a Type 3 LSA (0.0.0.0/0), which greatly reduces the LSDB size."
#Also refer to:
Huawei VRP Command Guide > OSPF > Configuration Notes > OSPF Special Areas

NEW QUESTION # 274
The following figure shows the OSPF network of an enterprise and the OSPF configurations of R1. Which of the following statements is false about the network?

A. R2 can access the server.
B. GE 0/0/1 of R1 cannot send OSPF packets.
C. GE 0/0/1 of R1 cannot accept OSPF packets.
D. The network segment to which GE 0/0/1 of R1 belongs cannot be advertised.

Answer: D

Explanation:
Silent Interface Explanation
* The silent-interface command is used to prevent OSPF from sending or receiving OSPF packets on the specified interface (GE 0/0/1). This disables OSPF adjacency establishment and stops route advertisement for that interface.
Network Observations
* Statement A: R2 can access the server.This is correct, as the silent interface does not impact data traffic, only OSPF-related communication.
* Statement B: GE 0/0/1 of R1 cannot send OSPF packets.Correct due to the silent-interface configuration.
* Statement C: The network segment to which GE 0/0/1 of R1 belongs cannot be advertised.This is correct, as the silent interface prevents route advertisement.
* Statement D: GE 0/0/1 of R1 cannot accept OSPF packets.Correct, as the silent interface configuration blocks packet reception.
HCIP-Datacom-Core Reference
* OSPF interface command behavior is outlined in the configuration and lab examples sections.

NEW QUESTION # 275
Which of the following messages are sent when BGP establishes peer relationships?

A. Update
B. Hello
C. Open
D. Keepalive

Answer: A,C,D

Explanation:
Comprehensive and Detailed in-depth Step-by-Step Explanation:
BGP (Border Gateway Protocol) uses specific message types to establish and maintain peer relationships between routers. The primary BGP messages involved during the establishment and maintenance of peer relationships are:
Open (D):
The Open message is the first message sent after a TCP connection is established between BGP peers.
It is used to exchange parameters such as the AS number, BGP version, hold time, and BGP identifier.
Keepalive (A):
After the Open message exchange, Keepalive messages are sent periodically to maintain the BGP session.
These messages confirm that the connection is still alive.
Update (C):
Update messages are used to exchange routing information after the peer relationship is established.
They contain information about network prefixes and their associated path attributes.
Hello (B):
Hello messages are not used in BGP. They are typically used in protocols like OSPF or IS-IS to establish and maintain neighbor relationships.
Thus, the correct answers areA (Keepalive),C (Update), andD (Open).
References:
Huawei HCIA-Datacom Study Guide, Chapter on "BGP Message Types".
RFC 4271 - Border Gateway Protocol 4 (BGP-4).

NEW QUESTION # 276
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Training H12-821_V1.0 Tools, H12-821_V1.0 Exam Syllabus

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Huawei HCIP-Datacom-Core Technology V1.0 Sample Questions (Q271-Q276):

Top Training H12-821_V1.0 Tools Free PDF | High-quality H12-821_V1.0 Exam Syllabus: HCIP-Datacom-Core Technology V1.0

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