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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: IS-IS Fundamentals | 8% | - IS-IS configuration and deployment - IS-IS protocol principles |
| Topic 2: OSPF Fundamentals | 16% | - OSPF special applications and troubleshooting - OSPF principles and operation mechanisms - OSPF configuration and optimization |
| Topic 3: Network Solutions and Design | 5% | - Enterprise network design principles - Typical network architecture and solution |
| Topic 4: Network Security | 8% | - Attack defense and security policy - ACL and packet filtering - AAA authentication |
| Topic 5: Network Reliability | 7% | - BFD technology - Device redundancy and link backup - VRRP protocol |
| Topic 6: WLAN Basics | 2% | - WLAN technology principles - WLAN deployment and optimization |
| Topic 7: Multicast Technologies | 9% | - Multicast basic concepts - IGMP protocol - PIM protocol |
| Topic 8: Routing Basics | 3% | - Routing concepts and classification - Routing table composition and selection rules |
| Topic 9: BGP Fundamentals | 17% | - BGP characteristics and working principles - BGP configuration and policy application - BGP route attributes and selection |
| Topic 10: Network Service and Management | 5% | - Network management and monitoring - DHCP and DNS services |
| Topic 11: Routing and Traffic Control | 10% | - Route import and redistribution - Policy-based routing - Routing policy and filtering |
| Topic 12: IPv6 Technologies | 3% | - IPv6 routing protocols - IPv6 address structure and configuration |
| Topic 13: Ethernet Switching Technologies | 7% | - Link aggregation and stack technology - VLAN principles and configuration - Spanning Tree Protocol |
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NEW QUESTION # 185
On the campus OSPF network shown in the following figure, the interfaces connecting the five routers are GE interfaces, and their costs are not changed. The import-route command is run on R1. After the network converges, the route to the server at 192.168.1.0/24 is queried on R2. Which of the following is the cost of this route?
Answer: B
Explanation:
Understanding the Network Setup:
* The OSPF network consists of three areas (Area 1, Area 0, and Area 2).
* The server's subnet 192.168.1.0/24 is directly connected to R1 and imported into OSPF using the command:import-route direct type 1 cost 2 The server's subnet 192.168.1.0/24 is directly connected to R1 and imported into OSPF using the command:import-route direct type 1 cost 2 The server's subnet 192.168.1.0/24 is directly connected to R1 and imported into OSPF using the command:import-route direct type 1 cost 2
* The type 1 specifies the route as an OSPF Type 1 external route, meaning both the external cost and the internal OSPF cost will be included when calculating the total cost.
* The external cost specified for the imported route is 2.
* Cost Calculation to R2:
* The interfaces between the routers are GE interfaces, and the default cost for GE interfaces is 1.
* The path from R2 to the server goes through the following hops:
* R2 # R1: Cost = 1 (intra-area link).
* R1 # Server: External cost = 2 (specified in the import-route command).
* Total cost to R2:Intra-area cost (1) + External cost (2) = 3
Total cost to R2:Intra-area cost (1) + External cost (2) = 3
Total cost to R2:Intra-area cost (1) + External cost (2) = 3
* Verification of Each Option:
* Option A (2): Incorrect. This only accounts for the external cost, ignoring the internal OSPF cost.
* Option B (4): Incorrect. This overestimates the cost by adding an extra hop.
* Option C (3): Correct. The total cost is 3 (1 for the intra-area link + 2 for the external cost).
* Option D (1): Incorrect. This ignores the external cost of the imported route.
References:
* HCIA-Datacom Study Guide, Chapter: OSPF Route Types and Cost Calculation
* Huawei OSPF Cost Configuration Details
NEW QUESTION # 186
In PIM, which of the following descriptions about DR is correct? (Multiple choice)
Answer: A,B
NEW QUESTION # 187
On an IS-IS network, areas are divided by router, and a router can belong to only one area. Therefore, an IS-IS router only needs to maintain the LSDB of its area.
Answer: B
Explanation:
IS-IS Area Division:
IS-IS divides areas by routers, not by links. A router is assigned to a specific IS-IS area, but it can belong to multiple levels:
Level 1: Maintains the LSDB (Link State Database) for the local area only.
Level 2: Maintains the LSDB for the backbone area and exchanges routes between areas.
Behavior of a Level 1-2 Router:
A router configured as Level 1-2 must maintain two separate LSDBs:
One for intra-area routes (Level 1).
One for inter-area routes (Level 2).
Incorrect Statement:
The statement that an IS-IS router only needs to maintain the LSDB of its area is incorrect because Level 1-2 routers maintain LSDBs for both levels.
NEW QUESTION # 188
An enterprise administrator wants to configure single-hop BFD to implement fast detection of direct links.
Which of the following configurations are mandatory?
Answer: B,C,D
Explanation:
For single-hop BFD (Bidirectional Forwarding Detection), the configuration must include the local and remote discriminators to uniquely identify the session endpoints. Additionally, enabling BFD globally is a prerequisite for initiating BFD sessions. Configuring multicast IP addresses isunnecessary for single-hop BFD, as it operates over direct links. Huawei's configuration guidelines specify these requirements to ensure effective deployment and operation of BFD.
Understanding BFD (Bidirectional Forwarding Detection):
BFD is a protocol used to detect link faults quickly between two routers.
Single-hop BFD operates on directly connected links and is commonly used for fast fault detection in routing protocols like OSPF and BGP.
HCIP-Datacom-Core Technology Training Material (BFD Basics and Configuration).
Mandatory Configurations for Single-Hop BFD:
A: Configure the remote discriminator of a BFD session:The remote discriminator is used to uniquely identify the BFD session at the remote end. This is essential for session establishment.
B: Configure the local discriminator of a BFD session:The local discriminator uniquely identifies the BFD session at the local end. This is required to establish a BFD session.
D: Enable BFD globally:BFD must be enabled globally on the router for the protocol to operate and for session configurations to take effect.
Optional Configuration:
C: Configure a multicast IP address for BFD:This is not required for single-hop BFD, as it operates over direct links using unicast communication. Multicast is used in other scenarios, like multi-hop BFD.
Conclusion:The correct configurations for single-hop BFD areA,B, andD.
NEW QUESTION # 189
Among the following security zones, which one is not the default security zone deployed by the USG series firewall?
Answer: C
NEW QUESTION # 190
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