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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Ethernet Switching Technologies | 7% | - VLAN principles and configuration - Spanning Tree Protocol - Link aggregation and stack technology |
| Topic 2: Routing and Traffic Control | 10% | - Routing policy and filtering - Policy-based routing - Route import and redistribution |
| Topic 3: Network Solutions and Design | 5% | - Enterprise network design principles - Typical network architecture and solution |
| Topic 4: IPv6 Technologies | 3% | - IPv6 routing protocols - IPv6 address structure and configuration |
| Topic 5: Routing Basics | 3% | - Routing table composition and selection rules - Routing concepts and classification |
| Topic 6: IS-IS Fundamentals | 8% | - IS-IS configuration and deployment - IS-IS protocol principles |
| Topic 7: Network Service and Management | 5% | - DHCP and DNS services - Network management and monitoring |
| Topic 8: Network Security | 8% | - Attack defense and security policy - ACL and packet filtering - AAA authentication |
| Topic 9: OSPF Fundamentals | 16% | - OSPF configuration and optimization - OSPF special applications and troubleshooting - OSPF principles and operation mechanisms |
| Topic 10: BGP Fundamentals | 17% | - BGP configuration and policy application - BGP characteristics and working principles - BGP route attributes and selection |
| Topic 11: WLAN Basics | 2% | - WLAN deployment and optimization - WLAN technology principles |
| Topic 12: Multicast Technologies | 9% | - PIM protocol - Multicast basic concepts - IGMP protocol |
| Topic 13: Network Reliability | 7% | - Device redundancy and link backup - BFD technology - VRRP protocol |
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NEW QUESTION # 123
There are two types of routing entries on a PIM network. (S, G) routing entries are used to set up on a PIM network and are applicable to both PIM-DM and PIM-SM networks.
Answer:
Explanation:
SPT
* Routing Entries in PIM
* (S, G) entries: Represent the shortest path tree (SPT) from a specific source (S) to a specific multicast group (G). These entries are created after data packets are transmitted directly from the source to the receivers.
* (S, G) entries are used in both PIM-DM and PIM-SM modes.
* PIM-DM and PIM-SM Modes
* In PIM-DM, multicast traffic is initially flooded throughout the network and pruned where no receivers exist. (S, G) entries represent source-specific paths created after the flooding stage.
* In PIM-SM, multicast traffic initially flows through a shared tree, but (S, G) entries are created when the network switches to the SPT for more efficient forwarding.
* HCIP-Datacom-Core Reference
* The functionality and application of (S, G) routing entries are detailed in multicast and PIM configuration chapters.
NEW QUESTION # 124
In VRRP networking, devices assume the Master and Backup roles after election. Match the two roles with their working mechanisms.(Token is reusable)
Answer:
Explanation:
A screenshot of a computer Description automatically generated
Explanation of VRRP Roles and Their Functions:
In VRRP (Virtual Router Redundancy Protocol), devices are assigned roles as either Master or Backup after an election process. Each role has specific responsibilities to ensure the availability of the virtual IP address.
Matching Roles and Mechanisms:
Master:
* Periodically send VRRP Advertisement packets.
* The Master device sends advertisement packets to inform Backup devices that it is active.
* Respond to an ARP request destined for a virtual IP address with an ARP reply carrying the virtual MAC address.
* The Master device is responsible for responding to ARP requests for the virtual IP and forwarding traffic for it.
Backup:
* Transition from Master to Backup immediately if a VRRP Advertisement packet with a higher priority is received.
* A Backup device becomes Master only if the current Master stops sending advertisement packets or has a lower priority.
* Discard IP packets destined for the virtual IP address.
* Backup devices do not process traffic for the virtual IP address unless they become the Master.
NEW QUESTION # 125
Hackers often obtain the login permissions of system administrators through various attacks.
Which of the following measures can be taken to enhance the security of administrator accounts?
(Select all that apply)
Answer: B,D
Explanation:
* A is correct - Removing unused accounts helps minimize the risk surface.
* B is false - Email is not a secure method for transferring sensitive information like passwords, even if encrypted.
* C is correct - Unique administrator accounts help with accountability and tracking.
* D is false - Long-term password validity reduces security. Passwords should be rotated regularly.
Reference from Huawei HCIP-Datacom-Core Technology Study Guide:
"To secure admin access, avoid account sharing, delete inactive users, and periodically update credentials through secure channels." (Chapter: Device Security - Section: Account Management)
NEW QUESTION # 126
On an IS-IS network, each router can generate LSPs. Which of the following events trigger the generation of a new LSP?
Answer: A,B,C
Explanation:
LSP Generation in IS-IS
IS-IS routers generate new Link State Packets (LSPs) under the following conditions:
Interface Status Changes: When IS-IS interfaces go up or down, the link state changes, triggering LSP updates.
Periodic Updates: IS-IS periodically regenerates LSPs to ensure link-state information remains synchronized across the network.
Interface Metric Changes: Any modification to interface costs results in a new LSP to reflect the updated cost in the network.
Incorrect Option
C: Inter-area IP routes change is incorrect because IS-IS does not inherently differentiate between areas for LSP generation.
HCIP-Datacom-Core Reference
IS-IS LSP generation rules are detailed in the IS-IS configuration and implementation chapters.
NEW QUESTION # 127
See the following figure. All routers on the network run IS-IS and are in area 49.0001. By referring to the LSDB of R1, the Level-2 DIS is. (Enter the device name, for example, R1.)
Answer:
Explanation:
R3
Explanation:
Understanding the LSDB and Level-2 DIS Election in IS-IS:
In IS-IS, the Designated Intermediate System (DIS) is elected for both Level-1 and Level-2 on broadcast networks to manage the link-state database (LSDB) and reduce the number of LSAs exchanged.
The election of the DIS is based on the highest priority. If the priority is the same, the router with the highest System ID becomes the DIS.
HCIP-Datacom-Core Technology Training Material (IS-IS DIS Election).
Analyzing the LSDB:
From the LSDB of R1, the Level-2 link-state database includes the following entries:
LSPID 0100.0000.3003.00-00: This is R3, and it is present in the Level-2 LSDB with the sequence number and checksum details.
Other routers (R1, R2, R4) are present but do not have the characteristics of the Level-2 DIS in this topology.
Based on the System IDs, R3 (0100.0000.3003) has the highest System ID, making it the Level-2 DIS.
Conclusion:
The Level-2 DIS on the network is R3, based on the election rules and the LSDB information shown in the figure.
NEW QUESTION # 128
......
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