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Huawei H12-821_V1.0 exam is a three-hour test that consists of 60 multiple-choice questions. H12-821_V1.0 exam is administered by Huawei and can be taken at any of the authorized Huawei testing centers worldwide. H12-821_V1.0 Exam is available in both English and simplified Chinese languages. The passing score for the exam is 600 out of 1000, and the result is valid for three years.
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Huawei HCIP-Datacom-Core Technology V1.0 Sample Questions (Q267-Q272):
NEW QUESTION # 267
On an OSPF network, if a router receives an update of an LSA that exists in the local LSDB, the router updates the LSDB and floods the LSA.
Answer: A
Explanation:
OSPF LSA Flooding Mechanism
* If a router receives an LSA identical to one already in its LSDB, it does not flood the LSA again unless the LSA has changed (i.e., the sequence number or content has been updated).
* OSPF ensures efficient use of bandwidth by avoiding redundant flooding of unchanged LSAs.
HCIP-Datacom-Core Reference
* The OSPF LSDB synchronization process explains that unchanged LSAs are not reflooded, ensuring stability and resource optimization.
NEW QUESTION # 268
Huawei modular devices have multiple hardware modules that provide different functions. Match the following hardware modules with their functions.
Answer:
Explanation:
Explanation:
The hardware modules of Huawei modular devices and their functions are:
* Main Processing Unit (MPU): Provides control and management planes for the entire system, responsible for protocol processing, system security, and software upgrades.
* Switch Fabric Unit (SFU): Provides the data plane, enabling high-speed data switching between service modules.
* Line Processing Unit (LPU): Manages data forwarding, offering various interfaces (optical and electrical) for data access.
NEW QUESTION # 269
When configuring an ACL on a router, you can specify a unique number or name to identify the ACL. Once a named ACL is created, it cannot be modified. You can only delete the named ACL and reconfigure it.
Answer: A
Explanation:
ACL Modification
* Named ACLs can be modified after their creation. Unlike numbered ACLs, named ACLs provide greater flexibility for editing individual rules without deleting the entire ACL.
* Therefore, the statement is incorrect.
HCIP-Datacom-Core Reference
* The flexibility and editability of named ACLs are discussed in the ACL configuration sections.
NEW QUESTION # 270
A non-client is an IBGP peer that functions as neither an RR nor a client. A non-client must establish fully meshed connections with the RR and all the other non-clients.
Answer: A
Explanation:
Non-Client Definition in IBGP
* In an IBGP setup with a Route Reflector (RR), a non-client is an IBGP peer that is neither the RR itself nor its client.
* Non-clients must establish fully meshed IBGP connections with all other non-clients and the RR because IBGP rules prohibit route propagation between non-clients without a direct connection.
HCIP-Datacom-Core Reference
* The behavior of non-clients in an RR topology is clearly outlined in the BGP implementation chapters.
NEW QUESTION # 271
BGP routes have multiple path attributes. When a router advertises a BGP route to its peers, the route carries multiple path attributes. These attributes describe the characteristics of the BGP route and affect route selection in some scenarios. The attribute is Huawei-specific. It is valid only on the local device and is not transmitted to BGP peers. (Enter the attribute name in lowercase as it appears in the command output about the BGP routing table.)
Answer:
Explanation:
preference
Explanation:
BGP routes have a variety of path attributes that describe their characteristics and influence route selection.
These attributes include well-known mandatory attributes like AS-PATH and NEXT-HOP, as well as optional attributes like MED and LOCAL_PREF.
In Huawei devices, there is a Huawei-specific attribute called "preference", which is a local parameter used to influence BGP route selection on the device.
* Key Characteristics of "preference":
* It is valid only locally on the router.
* It is not shared with BGP peers.
* It helps the router determine the best route when multiple routes exist for the same prefix.
* It appears in the BGP routing table output in lowercase as preference.
Thus, the correct answer is preference (entered in lowercase as required).
References:
* Huawei HCIA-Datacom Study Guide, Chapter on "BGP Attributes".
NEW QUESTION # 272
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