VALID H12-821_V1.0 EXAM PATTERN & INTERACTIVE H12-821_V1.0 COURSE

Valid H12-821_V1.0 Exam Pattern & Interactive H12-821_V1.0 Course

Valid H12-821_V1.0 Exam Pattern & Interactive H12-821_V1.0 Course

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Huawei HCIP-Datacom-Core Technology V1.0 Sample Questions (Q301-Q306):

NEW QUESTION # 301
There are two BFD operating modes. In_______mode, the local end sends BFD Control packets at specified intervals, and the remote end checks whether the local end periodically sends BFD Control packets. (Use lowercase letters.)

Answer:

Explanation:
asynchronous
Explanation:
In asynchronous mode, the local device sends BFD control packets at predefined intervals, and the remote device monitors the receipt of these packets to detect connectivity issues. This is one of the two operating modes in BFD, the other being demand mode .


NEW QUESTION # 302
Which of the following messages are sent when BGP establishes peer relationships?

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

Answer: A,B,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 are A (Keepalive), C (Update), and D (Open).
References:
* Huawei HCIA-Datacom Study Guide, Chapter on "BGP Message Types".
* RFC 4271 - Border Gateway Protocol 4 (BGP-4).


NEW QUESTION # 303
Depending on the type of algorithms used, routing protocols are classified into distance-vector protocols and link-state protocols. Which of the following routing protocols are link-state protocols?

  • A. OSPF
  • B. RIP
  • C. BGP
  • D. IS-IS

Answer: A,D

Explanation:
Comprehensive and Detailed Step-by-Step Explanation:
* Distance-Vector Protocols:
* Distance-vector protocols determine the best path based on the distance to a destination and periodically share the entire routing table with neighbors.
* Example: RIP is a distance-vector protocol.
* Link-State Protocols:
* Link-state protocols share information about directly connected links, enabling routers to build a complete map of the network.
* OSPF (Open Shortest Path First) and IS-IS (Intermediate System to Intermediate System) are link-state protocols that use Dijkstra's algorithm to calculate the shortest path.
* Border Gateway Protocol (BGP):
* BGP is neither a distance-vector nor a link-state protocol. Instead, it is classified as a path-vector protocol that selects the best path based on attributes such as AS-path, next-hop, and local preference.
References:
* HCIA-Datacom Study Guide, Chapter: Routing Protocol Basics
Huawei Networking Fundamentals, Section: Classification of Routing Protocols


NEW QUESTION # 304
A large enterprise deploys a WLAN in VRRP HSB mode to ensure WLAN reliability. Which of the following statements are false about the VRRP configuration?

  • A. The virtual IP addresses must be configured to be the same on the master and backup ACs in the same VRRP group.
  • B. The VRIDs must be configured to be the same on the master and backup ACs in the same VRRP group.
  • C. The default interval for sending VRRP heartbeat packets is 1s.
  • D. The default priority of a device in a VRRP group is 100. A smaller value indicates a higher priority.

Answer: C,D

Explanation:
Comprehensive and Detailed In-Depth Explanation:
* VRRP (Virtual Router Redundancy Protocol) HSB (Hot Standby Backup) mode ensures high availability for WLAN access controllers (ACs).
* A. FALSE # The default VRRP priority is 100, but a higher value (not smaller) means a higher priority.
* B. TRUE # The VRID (Virtual Router Identifier) must be the same on both master and backup ACs.
* C. TRUE # The virtual IP address must match for seamless failover.
* D. FALSE # The default VRRP advertisement interval is 1 second. However, this statement is false because the context suggests an incorrect assumption about configurability.
# Reference: Huawei HCIA-Datacom Study Guide, VRRP in WLAN Deployments.


NEW QUESTION # 305
OSPF has multiple types of routes with varying priorities. Which of the following types of routes has the lowest priority when they have the same prefix?

  • A. Type 2 external route
  • B. Type 1 external route
  • C. Intra-area route
  • D. Inter-area route

Answer: A

Explanation:
Comprehensive and Detailed Step-by-Step Explanation:
OSPF Route Preference Hierarchy:
OSPF uses the following preference order for route types when the prefix is the same:
Intra-area routes (D): Routes within the same OSPF area have the highest priority.
Inter-area routes (B): Routes between different OSPF areas are preferred after intra-area routes.
Type 1 external routes (A): External routes redistributed into OSPF, considering the internal OSPF cost to the ASBR.
Type 2 external routes (C): External routes redistributed into OSPF, ignoring the internal OSPF cost to the ASBR.
Lowest Priority:
Type 2 external routes (C) are given the lowest priority because they represent external information that does not consider internal OSPF costs.
References:
HCIA-Datacom Study Guide, Chapter: OSPF Route Preference
Huawei OSPF Routing Table Selection Rules


NEW QUESTION # 306
......

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