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Huawei H12-821_V1.0 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Network Solution | 2% | - Integrated network design scenarios |
| IS-IS | 8% | - IS-IS protocol fundamentals |
| Routing and Traffic Control | 10% | - Traffic engineering basics - Policy-based routing |
| Multicast | 9% | - IGMP and PIM concepts |
| Network Reliability | 8% | - Redundancy and failover mechanisms |
| Network Security | 9% | - ACL and basic security mechanisms |
| IPv6 | 3% | - IPv6 addressing and routing |
| Large-scale WLAN Architecture | 6% | - Enterprise WLAN deployment basics |
| Switching Technologies | 7% | - VLAN and STP fundamentals |
| BGP | 17% | - BGP policy and attributes - BGP path selection |
| OSPF | 16% | - OSPF areas and LSDB - OSPF core concepts |
| Network Service and Management | 2% | - Network management basics |
| Routing Fundamentals | 3% | - Network basics and routing principles |
Huawei HCIP-Datacom-Core Technology V1.0 Sample Questions:
In BGP, the MED attribute is transmitted only between two neighboring ASs. The AS that receives the MED attribute does not advertise it to a third AS. By default, a router compares only the MED values of BGP routes from the same neighboring AS. That is, if two routes to the same destination are from different neighboring ASs, the router does not compare the MED values of the two routes.
- A. TRUE
- B. FALSE
Correct Answer: A 🗳️
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.)
Reveal Solution Discussion 0Correct Answer:
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 " .
An enterprise administrator views the following details about a BGP route during routine O & M:
yaml
CopyEdit
< HUAWEI > display bgp routing-table 192.168.1.1
BGP local router ID: 10.1.1.1
Local AS number: 100
Paths: 2 available, 0 best, 0 select
BGP routing table entry information of 192.168.1.1/32:
From: 10.1.1.2 (10.1.1.2)
Route Duration: 00h01m31s
Relay IP Nexthop: 0.0.0.0
Relay IP Out-Interface: --
Original nexthop: 172.16.1.2
AS-path: 200, origin incomplete, MED 0, localpref 100, pref-val 0, internal, pre 255, invalid for IP unreachable Not advertised to any peer yet Which of the following statements are true about the BGP route?
- A. The original next hop of the route is 172.16.1.2.
- B. The local BGP router ID is 10.1.1.1.
- C. The local AS number is 100.
- D. The route is preferentially selected because its Local_Pref has a higher priority.
Correct Answer: A,B,C 🗳️
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A large number of external routes are imported to an NSSA of an enterprise ' s OSPF network. The customer requires that the number of LSAs in non-special areas be reduced. To meet this requirement, route summarization can be configured on an ABR in the NSSA to summarize the routes corresponding to the Type
5 LSAs translated from Type 7 LSAs.
- A. TRUE
- B. FALSE
Correct Answer: A 🗳️
There are various types of VPNs, which can be applied to different layers. Which of the following network layers does SSL VPN belong to?
- A. Transport layer
- B. Data link layer
- C. Network layer
- D. Application layer
Correct Answer: D 🗳️
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