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Free H12-821_V1.0 Exam Braindumps (page: 8)

Page 7 of 56
PDF with 219 Questions

The Next_Hop attribute in BGP records the next hop of a route. Similar to the next hop in an IGP, the Next_Hop attribute in BGP must be the IP address of a peer interface.

  1. TRUE
  2. FALSE

Answer(s): B

Explanation:

BGP Next_Hop Attribute

Unlike IGP, the Next_Hop attribute in BGP does not necessarily have to be the IP address of a peer interface. For example, in multi-hop BGP configurations, the Next_Hop can point to a different router or interface within the network.

HCIP-Datacom-Core Reference

Details of the Next_Hop attribute and its behavior are outlined in BGP path selection principles.



A BGP device receives a route carrying an unknown attribute from a peer but does not know whether other devices need the attribute. In this case, the BGP device retains this attribute when advertising the route to other peers.
Which of the following attributes is of this type?

  1. Community
  2. AS.Path
  3. MED
  4. OriginatorID

Answer(s): A

Explanation:

Transitive vs. Non-Transitive Attributes

The Community attribute is a transitive optional attribute, meaning that if a router receives a route with this attribute and does not understand its purpose, the router retains and propagates it to other peers.

Other options, such as AS_Path and MED, are well-defined mandatory or optional attributes with specific purposes.

HCIP-Datacom-Core Reference

The behavior of optional transitive attributes is detailed in the BGP protocol and attribute chapters.



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.

  1. TRUE
  2. FALSE

Answer(s): B

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.



ACLs are a common tool for matching routes. ACLs are classified into multiple types based on ACL

rule functions. An ACL can be identified by a number, and the number range for each type of ACLs is different.
Which of the following type of ACLs are numbered from 4000 to 4999?

  1. User-defined ACL
  2. Basic ACL
  3. Layer 2 ACL
  4. Advance ACL

Answer(s): A

Explanation:

ACL Number Ranges

Basic ACLs: Numbered from 2000 to 2999.

Advanced ACLs: Numbered from 3000 to 3999.

Layer 2 ACLs: Numbered from 5000 to 5999.

User-defined ACLs: Numbered from 4000 to 4999.

HCIP-Datacom-Core Reference

ACL classifications and their number ranges are covered in the ACL principles and configuration chapters.






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