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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Network Service and Management | 5% | - DHCP and DNS services - Network management and monitoring |
| Topic 2: IS-IS Fundamentals | 8% | - IS-IS configuration and deployment - IS-IS protocol principles |
| Topic 3: Network Security | 8% | - ACL and packet filtering - Attack defense and security policy - AAA authentication |
| Topic 4: WLAN Basics | 2% | - WLAN technology principles - WLAN deployment and optimization |
| Topic 5: Ethernet Switching Technologies | 7% | - Link aggregation and stack technology - Spanning Tree Protocol - VLAN principles and configuration |
| Topic 6: Routing and Traffic Control | 10% | - Route import and redistribution - Routing policy and filtering - Policy-based routing |
| Topic 7: BGP Fundamentals | 17% | - BGP route attributes and selection - BGP characteristics and working principles - BGP configuration and policy application |
| Topic 8: IPv6 Technologies | 3% | - IPv6 routing protocols - IPv6 address structure and configuration |
| Topic 9: Network Solutions and Design | 5% | - Enterprise network design principles - Typical network architecture and solution |
| Topic 10: OSPF Fundamentals | 16% | - OSPF principles and operation mechanisms - OSPF configuration and optimization - OSPF special applications and troubleshooting |
| Topic 11: Multicast Technologies | 9% | - Multicast basic concepts - PIM protocol - IGMP protocol |
| Topic 12: Network Reliability | 7% | - Device redundancy and link backup - BFD technology - VRRP protocol |
| Topic 13: Routing Basics | 3% | - Routing concepts and classification - Routing table composition and selection rules |
>> 免費下載Huawei H12-821_V1.0考題 <<
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問題 #211
BGP prefers the route with the best Origin attribute value. The Origin attribute value is: (), IGP, Incomplete.
答案：
解題說明：
EGP
問題 #212
Four routers run ISIS and have established adjacencies. The area IDs and router levels are marked in the following figure. If route leaking is configured on R3, which of the following is the cost of the route from R4 to 10.0.2.2/32?
答案：C
問題 #213
In VRRP networking, devices assume the Master and Backup roles after election. Match the two roles with their working mechanisms.(Token is reusable)
答案：
解題說明：
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.
問題 #214
On an IS-IS network, routers send LSPs to exchange link state information. LSPs are classified into Level-1 LSPs and Level-2 LSPs and have the same format.
Which of the following parts constitute the LSP ID in an LSP?
答案：A,B,D
解題說明：
IS-IS Overview: Intermediate System to Intermediate System (IS-IS) is a link-state routing protocol. Routers exchange Link State Packets (LSPs) to maintain a synchronized link-state database. These LSPs are categorized into Level-1 LSPs (intra-area routing) and Level-2 LSPs (inter-area routing). Both types share the same packet format.
問題 #215
Which of the following descriptions of wildcard masks is correct?
答案：C
問題 #216
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