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| Section | Weight | Objectives |
|---|---|---|
| OSPF Fundamentals | 16% | - OSPF principles and operation mechanisms - OSPF configuration and optimization - OSPF special applications and troubleshooting |
| Ethernet Switching Technologies | 7% | - Link aggregation and stack technology - VLAN principles and configuration - Spanning Tree Protocol |
| Routing Basics | 3% | - Routing table composition and selection rules - Routing concepts and classification |
| Multicast Technologies | 9% | - IGMP protocol - Multicast basic concepts - PIM protocol |
| Network Solutions and Design | 5% | - Enterprise network design principles - Typical network architecture and solution |
| Network Security | 8% | - ACL and packet filtering - AAA authentication - Attack defense and security policy |
| IS-IS Fundamentals | 8% | - IS-IS protocol principles - IS-IS configuration and deployment |
| Network Reliability | 7% | - VRRP protocol - BFD technology - Device redundancy and link backup |
| BGP Fundamentals | 17% | - BGP route attributes and selection - BGP characteristics and working principles - BGP configuration and policy application |
| WLAN Basics | 2% | - WLAN deployment and optimization - WLAN technology principles |
| Network Service and Management | 5% | - Network management and monitoring - DHCP and DNS services |
| IPv6 Technologies | 3% | - IPv6 routing protocols - IPv6 address structure and configuration |
| Routing and Traffic Control | 10% | - Policy-based routing - Routing policy and filtering - Route import and redistribution |
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NEW QUESTION # 280
During BGP route summarization configuration, the keyword can be used to suppress all specific routes so that only the summary route is advertised. The summary route carries the Atomic-aggregate attribute rather than the community attributes of specific routes.
Answer:
Explanation:
suppress-spec-map
Explanation:
Understanding BGP Route Summarization :
* In Border Gateway Protocol (BGP), route summarization is a technique used to aggregate multiple specific prefixes into a broader summary prefix. This reduces the size of routing tables and improves routing efficiency.
* Summarization helps to hide unnecessary details from other parts of the network while still maintaining connectivity. HCIP-Datacom-Core Technology Training Material (BGP Route Summarization) .
Suppressing Specific Routes :
When summarizing routes, the suppress-spec-map keyword is used to suppress specific prefixes so that only the summarized route is advertised.
The suppressed routes are not advertised to BGP peers; instead, only the summary route is propagated.
Reference : HCIP-Datacom Advanced Routing & Switching Technology (BGP Attributes and Summarization Techniques) .
Atomic-Aggregate Attribute :
The summary route generated during BGP route summarization carries the Atomic-aggregate attribute. This attribute indicates that the summary route might not provide the exact path information available in the original specific routes.
Additionally, when using the suppress-spec-map option, the specific routes ' attributes, such as community attributes, are not included in the summary route.
Reference : HCIP-Datacom-Core Technology Training Material (BGP Path Attributes) .
Conclusion :
The suppress-spec-map keyword is used to suppress specific routes when performing BGP summarization.
The summarized route includes the Atomic-aggregate attribute but does not carry community attributes from the suppressed routes.
NEW QUESTION # 281
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 # 282
A campus network uses OSPF for network communication. The display ospf peer command is run on a router, and the command output is as follows:
vbnet
Copy
Edit
<R2> display ospf peer
OSPF Process 1 with Router ID 10.0.2.2
Area 0.0.0.0 interface 10.0.235.2 (GigabitEthernet0/0/1)'s neighbors Router ID: 10.0.5.5 Address: 10.0.235.5 State: Full Mode: Nbr is Master Priority: 1 DR: 10.0.235.5 BDR: 10.0.235.3 MTU: 0 Dead timer due in 40 sec Area 0.0.0.0 interface 10.0.24.2 (Serial1/0/1)'s neighbors Router ID: 10.0.4.4 Address: 10.0.24.4 State: Full Mode: Nbr is Master Priority: 1 DR: None BDR: None MTU: 0 Dead timer due in 35 sec Which of the following statements are true about the device?
Answer: A,B,C
Explanation:
Analysis of the OSPF Neighbor State:
Router ID 10.0.5.5:
On interface 10.0.235.2 (GigabitEthernet0/0/1), the neighbor state is Full, indicating that adjacency is established.
The Designated Router (DR) is 10.0.235.5, which is the same as the neighbor's address.
Router ID 10.0.4.4:
On interface 10.0.24.2 (Serial1/0/1), the neighbor state is also Full, meaning adjacency is established. The DR/BDR election status shows None, indicating that the interface is on a point-to-point link where DR/BDR election does not apply.
NEW QUESTION # 283
In the IS-IS broadcast network, which multicast MAC address does the Level-2 router use as the destination address for sending lH?
Answer: D
NEW QUESTION # 284
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?
Answer: C
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.
NEW QUESTION # 285
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