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| Section | Weight | Objectives |
|---|---|---|
| Multicast Technologies | 9% | - Multicast basic concepts - IGMP protocol - PIM protocol |
| Ethernet Switching Technologies | 7% | - Spanning Tree Protocol - VLAN principles and configuration - Link aggregation and stack technology |
| Network Service and Management | 5% | - Network management and monitoring - DHCP and DNS services |
| Routing Basics | 3% | - Routing table composition and selection rules - Routing concepts and classification |
| OSPF Fundamentals | 16% | - OSPF special applications and troubleshooting - OSPF configuration and optimization - OSPF principles and operation mechanisms |
| Routing and Traffic Control | 10% | - Routing policy and filtering - Policy-based routing - Route import and redistribution |
| BGP Fundamentals | 17% | - BGP route attributes and selection - BGP characteristics and working principles - BGP configuration and policy application |
| IPv6 Technologies | 3% | - IPv6 address structure and configuration - IPv6 routing protocols |
| Network Solutions and Design | 5% | - Typical network architecture and solution - Enterprise network design principles |
| Network Reliability | 7% | - VRRP protocol - Device redundancy and link backup - BFD technology |
| Network Security | 8% | - AAA authentication - ACL and packet filtering - Attack defense and security policy |
| IS-IS Fundamentals | 8% | - IS-IS protocol principles - IS-IS configuration and deployment |
| WLAN Basics | 2% | - WLAN technology principles - WLAN deployment and optimization |
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NEW QUESTION # 21
An enterprise administrator configures route summarization on ASBRs to reduce the number of inter-area Type 3 LSAs, which in turn reduces the routing table size and improves device resource utilization.
Answer: A
Explanation:
OSPF Route Summarization:
Route summarization combines multiple specific routes into a single summary route. This reduces the number of LSAs advertised between OSPF areas, especially Type 3 LSAs.
Benefits of Route Summarization:
Reduces the size of the OSPF database and routing table.
Minimizes the processing overhead on routers by decreasing the number of routing entries.
Improves the scalability of the OSPF network.
ASBR Function:
The ASBR advertises external routes into OSPF and can summarize routes at area boundaries or during redistribution.
NEW QUESTION # 22
When the payload is an ICMPv6 message, if the extension header is not considered, what is the value of the Next Header field in the IPv6 header?
Answer: B
NEW QUESTION # 23
An enterprise uses OSPF to implement network communication. To ensure data validity and security, all authentication modes supported by OSPF are enabled on routers. In this case, interface authentication is preferentially used by the routers.
Answer: A
Explanation:
OSPF Authentication Overview
OSPF supports three authentication modes:
Null Authentication: No authentication (default).
Plaintext Authentication: Uses clear-text passwords.
MD5 Authentication: Secure cryptographic authentication.
Interface-Level Priority
When both interface-level and area-level authentication are configured, OSPF prioritizesinterface-level authentication. This ensures that interface-specific security overrides area-wide configurations for greater granularity and security.
HCIP-Datacom-Core Reference
OSPF authentication hierarchy and configurations are detailed in the OSPF security configuration chapter.
NEW QUESTION # 24
Which of the following prefix lists can match any routing entry except the default route?
Answer: D
NEW QUESTION # 25
SSH is a secure protocol that establishes tunnels for users on insecure networks. Which of the following statements is false about SSH login?
Answer: D
Explanation:
Comprehensive and Detailed In-Depth Explanation:
* SSH (Secure Shell) provides secure remote login and data encryption over insecure networks.
* A. TRUE # SSH requires user authentication before access is granted.
* B. TRUE # Enabling SSH opens listening ports, which could be scanned by attackers. Proper security measures (e.g., disabling unused SSH access) are recommended.
* C. TRUE # ACLs can be applied to VTY (Virtual Terminal) lines to restrict SSH access based on IP addresses.
* D. FALSE # The default SSH server port is 22, not 23. Port 23 is used for Telnet, which is less secure than SSH.
# Reference: Huawei HCIA-Datacom Study Guide, SSH Configuration and Security Measures.
NEW QUESTION # 26
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