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| Section | Objectives |
|---|---|
| Topic 1: Network Service and Management | - O&M Technologies
|
| Topic 2: Ethernet Switching Technology | - Switching Fundamentals
|
| Topic 3: BGP | - BGP Technologies
|
| Topic 4: Routing Basics | - IP Routing Fundamentals
|
| Topic 5: Network Solutions | - Enterprise Network Solutions
|
| Topic 6: Network Reliability | - Reliability Technologies
|
| Topic 7: IS-IS | - IS-IS Fundamentals
|
| Topic 8: IPv6 | - IPv6 Fundamentals
|
| Topic 9: WLAN | - Wireless Networking
|
| Topic 10: Network Security | - Security Technologies
|
| Topic 11: OSPF | - OSPF Fundamentals
|
| Topic 12: Routing and Traffic Control | - Traffic Management
|
| Topic 13: Multicast | - IP Multicast Technologies
|
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NEW QUESTION # 388
IP multicast effectively conserves network bandwidth and reduces network load. Therefore, it is widely used in network services, such as IPTV, real-time data transmission, and multimedia conferencing.
Answer: A
Explanation:
Comprehensive and Detailed Step-by-Step Explanation:
1. Overview of IP Multicast:
* IP multicast is a method of delivering data from one source to multiple destinations simultaneously.
* Unlike unicast (one-to-one communication) or broadcast (one-to-all communication), multicast is one- to-many, allowing data to be sent only to subscribers (multicast group members).
* This significantly conserves bandwidth and reduces the load on the network because the source only sends a single stream of data, which is replicated by multicast routers as needed.
2. Use Cases for IP Multicast:
IP multicast is widely used in network services that involve real-time or large-scale data delivery, such as:
* IPTV (Internet Protocol Television): Broadcasting live TV streams.
* Real-Time Data Transmission: Delivering stock market data, sensor updates, etc.
* Multimedia Conferencing: Supporting group calls, webinars, and online meetings.
3. Why the Statement is TRUE:
* IP multicast reduces unnecessary traffic and maximizes efficiency, making it ideal for these types of network services.
NEW QUESTION # 389
Attack source tracing can find the attack source user or attack source interface based on the information in the attack packet, so that the administrator can be alerted through alarms and logs, or the packet can be discarded directly.
Answer: A
NEW QUESTION # 390
BFD can associate with multiple protocols to quickly detect faults.
Which of the following functions are supported?(Select all that apply)
Answer: A,B,D
Explanation:
BFD (Bidirectional Forwarding Detection)is a lightweight protocol that providesrapid detectionof faults in the forwarding path between two routers or switches.
It worksin conjunction with routing protocolsand provides fast failure detection to enable quick route convergence.
Protocol support:
B: BFD for static routes- Supported. BFD tracks the reachability of next-hop addresses and can trigger route removal upon failure.
C: BFD for OSPF- Supported. BFD can be associated with OSPF to accelerate the detection of neighbor failures.
D: BFD for BGP- Supported. BFD enables sub-second detection of BGP peer failures.
A: BFD for PIM-Not supported. PIM (Protocol Independent Multicast) typically does not use BFD for neighbor failure detection.
Reference from Huawei HCIP-Datacom-Core Technology Study Guide:
"BFD can be associated with static routes, OSPF, IS-IS, BGP, and other protocols to quickly detect link or device faults and trigger fast rerouting." (Chapter: High Availability Technologies - Section: BFD Principles and Applications)
NEW QUESTION # 391
On the network shown in the following figure, the management VLAN is VLAN 10, and the AP is configured to obtain an IP address on the network segment 10.1.1.0/24 through DHCP. The AP, AC, and AR function as the DHCP client, DHCP relay agent, and DHCP server, respectively. Which of the following configurations for the DHCP relay agent and DHCP server are correct?
Answer: B,C
Explanation:
Option A correctly configures the DHCP relay agent (AC) to forward requests to the DHCP server using VLAN 10.Option B correctly configures the DHCP server (AR) with the correct IP pool (10.1.1.0/24), gateway, and excluded IP addresses. The static route to 10.1.1.0 through 172.21.1.1 ensures proper routing .
=========
NEW QUESTION # 392
Which of the following statements regarding the LSA age field are true?
Answer: B,D
Explanation:
The LS age field in OSPF LSAs (Link State Advertisements) is measured in seconds and increments over time in the Link State Database (LSDB). If the LS age reaches the LSRefreshTime (30 minutes), the router that originated the LSA must regenerate it to keep the LSA valid in the network. Options C and B are incorrect since LS age does not decrease, and only the originator regenerates LSAs .
NEW QUESTION # 393
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