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| Section | Objectives |
|---|---|
| Data Center Network Fundamentals | - Data Center Architecture Overview
|
| O&M and Troubleshooting | - Operations and Maintenance
|
| Network Security and Reliability | - Data Center Security Mechanisms
|
| Data Center Switching Technologies | - Ethernet Switching in Data Centers
|
| VXLAN Technology | - Overlay Networking
|
| Data Center Routing | - Routing Protocols in DC Environment
|
| SDN and Network Automation | - Software Defined Networking
|
>> H12-893_V1.0 Latest Test Practice <<
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NEW QUESTION # 71
VXLAN is a network virtualization technology that uses MAC-in-UDP encapsulation. What is the destination port number used during UDP encapsulation?
Answer: B
Explanation:
VXLAN (Virtual Extensible LAN) is a network overlay technology that encapsulates Layer 2 Ethernet frames within UDP packets to extend Layer 2 networks over Layer 3 infrastructure, widely used in Huawei's CloudFabric data center solutions. The encapsulation process, often referred to as "MAC-in-UDP," involves wrapping the original Ethernet frame (including MAC addresses) inside a UDP packet.
UDP Encapsulation: The VXLAN header follows the UDP header, and the destination UDP port number identifies VXLAN traffic. The Internet Assigned Numbers Authority (IANA) has officially assigned UDP port 4789 as the default destination port for VXLAN.
Options Analysis:
A . 4787: This is not a standard VXLAN port and is not recognized by IANA or Huawei documentation.
B . 4789: This is the correct and widely adopted destination port for VXLAN, as specified in RFC 7348 and implemented in Huawei's VXLAN configurations.
C . 4790: This port is not associated with VXLAN and is unused in this context.
D . 4788: This is not a standard VXLAN port; it may be confused with other protocols but is not correct for VXLAN.
Thus, the destination port number used during UDP encapsulation in VXLAN is B (4789), aligning with Huawei's VXLAN implementation standards.
NEW QUESTION # 72
VXLAN is a network virtualization technology that uses MAC-in-UDP encapsulation. What is the destination port number used during UDP encapsulation?
Answer: B
Explanation:
VXLAN (Virtual Extensible LAN) is a network overlay technology that encapsulates Layer 2 Ethernet frames within UDP packets to extend Layer 2 networks over Layer 3 infrastructure, widely used in Huawei's CloudFabric data center solutions. The encapsulation process, often referred to as "MAC-in-UDP," involves wrapping the original Ethernet frame (including MAC addresses) inside a UDP packet.
UDP Encapsulation: The VXLAN header follows the UDP header, and the destination UDP port number identifies VXLAN traffic. The Internet Assigned Numbers Authority (IANA) has officially assigned UDP port 4789 as the default destination port for VXLAN.
Options Analysis:
A). 4787: This is not a standard VXLAN port and is not recognized by IANA or Huawei documentation.
B). 4789: This is the correct and widely adopted destination port for VXLAN, as specified in RFC
7348 and implemented in Huawei's VXLAN configurations.
C). 4790: This port is not associated with VXLAN and is unused in this context.
D). 4788: This is not a standard VXLAN port; it may be confused with other protocols but is not correct for VXLAN.
Thus, the destination port number used during UDP encapsulation in VXLAN is B (4789), aligning with Huawei's VXLAN implementation standards.
NEW QUESTION # 73
A Huawei data center uses distributed gateways on leaf switches. Which advantage does this design primarily provide compared with a centralized gateway architecture?
Answer: A
Explanation:
Distributed gateways allow local routing at the access layer, reducing unnecessary traffic through centralized devices. This minimizes latency for east-west traffic and improves scalability. BGP remains important for EVPN control-plane operations.
NEW QUESTION # 74
A tenant experiences intermittent communication after duplicate MAC addresses appear on different leaf switches. Which EVPN capability is designed to detect such situations?
Answer: C
Explanation:
EVPN includes MAC mobility procedures that recognize endpoint movement and detect conflicting advertisements. Sequence numbers help determine the latest valid location, reducing forwarding inconsistencies caused by duplicate MAC announcements.
NEW QUESTION # 75
Two servers connected to different leaf switches belong to the same VXLAN segment. Which device performs VXLAN encapsulation before packets enter the Layer 3 underlay network?
Answer: B
Explanation:
The VXLAN Tunnel Endpoint encapsulates original Ethernet frames into VXLAN packets before forwarding them through the IP underlay. Remote VTEPs remove the VXLAN header upon packet arrival. Other listed devices do not perform this encapsulation function.
NEW QUESTION # 76
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