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| Section | Objectives |
|---|---|
| Network Service and Management | - O&M Technologies
|
| Network Security | - Security Technologies
|
| Ethernet Switching Technology | - Switching Fundamentals
|
| Network Solutions | - Enterprise Network Solutions
|
| IS-IS | - IS-IS Fundamentals
|
| Multicast | - IP Multicast Technologies
|
| Routing Basics | - IP Routing Fundamentals
|
| Routing and Traffic Control | - Traffic Management
|
| WLAN | - Wireless Networking
|
| Network Reliability | - Reliability Technologies
|
| OSPF | - OSPF Fundamentals
|
| BGP | - BGP Technologies
|
| IPv6 | - IPv6 Fundamentals
|
>> New H12-821_V1.0 Exam Questions <<
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NEW QUESTION # 186
Which of the following statements regarding different LSA types is false?
Answer: D
NEW QUESTION # 187
Which of the following parameters are not mandatory items when configuring BGP Peer? (Multiple choice)
Answer: B,C
NEW QUESTION # 188
IGMP Snooping runs at the data link layer and is used to manage and control multicast groups, and solves the problem of multicast packets being broadcast on Layer 3.
Answer: B
NEW QUESTION # 189
In an MST region, MSTP independently calculates an MSTI for each VLAN based on mappings between VLANs and MSTIs.
Which of the following statements is false about the characteristics of MSTIs?
Answer: C
Explanation:
A is false- Ports in MSTP can havedifferent roles and statesin different MSTIs. Each MSTI can independently elect a root and compute its own topology, which results indifferent port states per MSTI.
B is true- MSTIs use thesame spanning tree algorithm as STP (and RSTP)for calculating the spanning tree topology.
C is true- Each MSTI may have adifferent root bridgeand separate topology, depending on VLAN mappings.
D is true- MSTIs do not independently send BPDUs;only MSTI 0 (CIST)actually sends BPDUs, and information about other MSTIs is encapsulated within it. So thestatement is worded to test conceptual understanding, but not incorrect in MSTP context as framed.
Reference from Huawei HCIP-Datacom-Core Technology Study Guide:
"MSTP allows different MSTIs to have different topologies. A port may be forwarding in MSTI 1 but blocking in MSTI 2. This independence improves VLAN-based traffic engineering." (Chapter: MSTP Concepts - Section: MSTI Behavior and Port Roles)
NEW QUESTION # 190
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 example, R1.)
Answer:
Explanation:
R4
Explanation:
DIS Election in IS-IS:
In IS-IS, theDesignated Intermediate System (DIS)is elected on broadcast networks to reduce the number of LSAs exchanged and maintain the LSDB.
The DIS is elected based onpriority:
The router with thehighest priorityis elected as the DIS.
If priorities are equal, theSystem IDis used as a tie-breaker, and the router with thehighest System IDbecomes 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 isR4, and it will be elected as the DIS.
NEW QUESTION # 191
......
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