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| Section | Weight | Objectives |
|---|---|---|
| Routing Basics | 3% | - Routing concepts and classification - Routing table composition and selection rules |
| Ethernet Switching Technologies | 7% | - Link aggregation and stack technology - VLAN principles and configuration - Spanning Tree Protocol |
| Multicast Technologies | 9% | - Multicast basic concepts - PIM protocol - IGMP protocol |
| IPv6 Technologies | 3% | - IPv6 address structure and configuration - IPv6 routing protocols |
| Network Service and Management | 5% | - DHCP and DNS services - Network management and monitoring |
| Network Reliability | 7% | - Device redundancy and link backup - VRRP protocol - BFD technology |
| WLAN Basics | 2% | - WLAN deployment and optimization - WLAN technology principles |
| Network Security | 8% | - AAA authentication - ACL and packet filtering - Attack defense and security policy |
| BGP Fundamentals | 17% | - BGP characteristics and working principles - BGP route attributes and selection - BGP configuration and policy application |
| Routing and Traffic Control | 10% | - Routing policy and filtering - Route import and redistribution - Policy-based routing |
| OSPF Fundamentals | 16% | - OSPF special applications and troubleshooting - OSPF principles and operation mechanisms - OSPF configuration and optimization |
| IS-IS Fundamentals | 8% | - IS-IS protocol principles - IS-IS configuration and deployment |
| Network Solutions and Design | 5% | - Enterprise network design principles - Typical network architecture and solution |
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NEW QUESTION # 177
The four routers run IS-IS and have established adjacency. The area numbers and router levels are shown in the figure.
Which of the following is correct?
Answer: B
NEW QUESTION # 178
R1, R2, R3, and R4 run IS-IS, and the DIS priorities of their interfaces are shown in the following figure. If all these devices are started simultaneously, will be elected as the DIS. (Enter the device name, for ex ample, R1.)
Answer:
Explanation:
R4
* DIS Election in IS-IS :
* In IS-IS, the Designated Intermediate System (DIS) is elected on broadcast networks to reduce the number of LSAs exchanged and maintain the LSDB.
* The DIS is elected based on priority :
* The router with the highest priority is elected as the DIS.
* If priorities are equal, the System ID is used as a tie-breaker, and the router with the highest System ID becomes the DIS.
* HCIP-Datacom-Core Technology Training Material (IS-IS DIS Election Mechanism) .
Given DIS Priorities :
R1: Priority = 10
R2: Priority = 20
R3: Priority = 30
R4: Priority = 40
R4 has the highest DIS priority of 40 , which makes it the clear choice for DIS election.
Scenario Details :
Since all devices are started simultaneously, the DIS election process will follow the priorities without requiring a tie-breaker (System ID).
Conclusion :
The device with the highest DIS priority is R4 , and it will be elected as the DIS.
NEW QUESTION # 179
There can be multiple nodes under one Route-Policy, and the device starts matching in order when calling Route-Policy.
Answer: B
NEW QUESTION # 180
The following figure shows the BGP state switching mechanism. Drag the following BGP states to the corresponding sequence numbers.
Answer:
Explanation:
Explanation:
1 - Idle
2 - Connect
3 - OpenSent
4 - OpenConfirm
5 - Established
6 - Active
The BGP finite state machine defines how a BGP speaker transitions through various states when establishing and maintaining a BGP session. Below is the role of each state:
Idle (1) - BGP is waiting to start a connection. Initial state of the BGP process.
Connect (2) - BGP initiates a TCP connection to the peer.
OpenSent (3) - TCP connection is established; BGP sends an OPEN message and waits for one from the peer.
OpenConfirm (4) - BGP has received a valid OPEN message and is now expecting a KEEPALIVE.
Established (5) - BGP session is fully established; UPDATE messages can now be exchanged.
Active (6) - If the TCP connection fails in Connect state, BGP transitions to Active and will retry connection.
Reference from Huawei HCIP-Datacom-Core Technology Study Guide:
"BGP goes through the following states in order: Idle # Connect # Active # OpenSent # OpenConfirm # Established. The transition depends on the success or failure of TCP connection setup and BGP message exchanges." (Chapter: BGP Principles - Section: BGP State Machine)
NEW QUESTION # 181
Which of the following statements is false about the default processing of the next hop address when a BGP device advertises a route?
Answer: D
Explanation:
Comprehensive and Detailed Step-by-Step Explanation:
* Default Next Hop Behavior in BGP:
* Locally Originated Routes (A): The next hop is set to the advertising router's interface IP address.
* Routes Received from EBGP (B): The next hop is not changed when these routes are advertised to IBGP peers. (This makes Option B false.)
* Routes Advertised to EBGP (C): The next hop is set to the interface IP address of the advertising router.
* Routes Advertised Between IBGP Peers (D): The next hop is not modified by default.
* Incorrect Statement:
* Option B is incorrect because the next hop of a non-labeled route received from an EBGP peer is not changed when it is advertised to IBGP peers.
References:
* HCIA-Datacom Study Guide, Chapter: BGP Next Hop Behavior
Huawei BGP Routing Principles
NEW QUESTION # 182
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