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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: WAN Interconnection Network Planning and Deployment | 8% | - SD-WAN
|
| Topic 2: Campus Network Planning and Deployment | 23% | - Network Services
|
| Topic 3: Bearer WAN Planning and Deployment | 15% | - VPN Services
|
| Topic 4: Network Automation | 17% | - Automation Technologies
|
| Topic 5: Advanced Routing and Switching Technology | 37% | - MPLS
|
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NEW QUESTION # 125
Huawei's SDN controller using VXLAN technology is fixed?
Answer: A
NEW QUESTION # 126
Complete the basic processing procedure for DiffServ model-based QoS shown in the figure
Answer:
Explanation:
Explanation:
The Differentiated Services (DiffServ) model for Quality of Service (QoS) enables traffic management based on predefined priorities. This involves classifying, policing, queuing, and scheduling traffic to ensure efficient network resource utilization.
Breakdown of Each QoS Processing Step:
# Step 1: Traffic Classification and Marking
* Purpose: Identifies and marks packets based on QoS attributes such as DSCP (Differentiated Services Code Point) or 802.1p priority bits.
* Function: Assigns a QoS label to packets for further processing.
* Example: Packets carrying voice traffic (EF - Expedited Forwarding) are marked for high-priority treatment.
# Step 2: Traffic Policing (CAR - Committed Access Rate)
* Purpose: Enforces bandwidth limits on specific traffic flows to prevent excessive usage.
* Function: Drops or re-marks packets exceeding the assigned bandwidth threshold.
* Example: If a video stream exceeds 10 Mbps, excess packets may be dropped or re-marked.
# Step 3: Congestion Management (Queuing and Scheduling)
* Purpose: Manages traffic flow through queues based on assigned QoS levels.
* Function: Places packets in appropriate priority queues (e.g., Strict Priority, Weighted Fair Queuing - WFQ, CBWFQ).
* Example: Voice packets are assigned to high-priority queues for low-latency forwarding.
# Step 4: Congestion Avoidance
* Purpose: Prevents network buffer overflows and excessive packet drops.
* Function: Uses mechanisms like WRED (Weighted Random Early Detection) to drop lower-priority packets before congestion occurs.
* Example: If a queue reaches 80% capacity, WRED may drop low-priority packets to maintain QoS.
# Step 5: Traffic Shaping
* Purpose: Smooths out traffic bursts to maintain a consistent transmission rate.
* Function: Buffers and delays packets to prevent excessive packet drops.
* Example: If outgoing traffic exceeds 50 Mbps, shaping ensures it does not exceed this limit while maintaining steady flow.
NEW QUESTION # 127
A carrier's home broadband service requires a maximum downstream bandwidth of 100 Mbit/s during off- peak hours and a guaranteed downstream bandwidth of 50 Mbit/s during peak hours. The home broadband service includes the home IP phone service and the home Internet access service. Which of the following configurations best meets the service requirement?
Answer: A
Explanation:
Comprehensive and Detailed In-Depth Explanation:
The correct configuration is qos car inbound cir 50000 pir 100000.
CIR (Committed Information Rate):The guaranteed minimum bandwidth, set to 50 Mbit/s (50000 kbps).
PIR (Peak Information Rate):The maximum allowable bandwidth, set to 100 Mbit/s (100000 kbps).
This configuration ensures that during peak hours, the minimum guaranteed bandwidth is 50 Mbit/s, while during off-peak hours, the bandwidth can increase to a maximum of 100 Mbit/s. The settings align with the carrier's requirements for dynamic bandwidth allocation based on network load.
NEW QUESTION # 128
In a scenario where a VXLAN tunnel is dynamically established through BGP EVPN, run the command on the VTEP to view BGP EVPN routes. The route entries shown in the following figure are displayed. Which of the following statements about these routing entries are correct?
Network (EthTagId/IP Prefix/IP PrefixLen)
NextHop
*>i 0:172.16.2.0:24 1.1.1.2
*>i 0:172.16.13.0:24 1.1.1.2
*>i 0:192.168.122.0:30 1.1.1.2
Answer: B,C
Explanation:
Understanding BGP EVPN Route Types for VXLAN
#BGP EVPN (Ethernet VPN) is used for VXLAN control-plane learning.
#EVPN Type 2 Route (MAC/IP Advertisement)
Carries:MAC + Host IP
Used for:L2 forwarding, Host Mobility
#EVPN Type 5 Route (IP Prefix Advertisement)
Carries:Network segment (Subnet) + Prefix
Used for:VXLAN L3 routing
#What Do the Given Route Entries Show?
0:172.16.2.0/24
0:172.16.13.0/24
0:192.168.122.0/30
#These are IPv4 Subnets, NOT individual MACs.
#Since they carry IP Prefixes, they belong to EVPN Type 5.
Analysis of the Answer Choices:
#A. These routes are Type 5 routes and carry network segment or mask information.
Correct:The displayed routescarry network prefixes, which belong toEVPN Type 5.
#B. These routes are Type 2 routes and carry host IP addresses.
Incorrect:Type 2 routescarry MAC + Host IP, NOT full subnets.
#C. These routes carry the L2VNI.
Incorrect:L2VNI is forLayer 2 VXLAN bridging, but these areIP Prefix Routes (L3 routing).
#D. These routes carry the L3VNI.
Correct:Type 5 routes are used forVXLAN L3 routing, which means they belong toL3VNI.
Real-World Application:
VXLAN L3 Gateways:Type 5 routes enabledistributed routing between VXLAN segments.
Data Center Networks:Used tointerconnect virtual machines (VMs) across different subnets.
#Reference:Huawei HCIE-Datacom Guide - BGP EVPN & VXLAN L3 Routing
NEW QUESTION # 129
A network administrator runs the display telemetry subscription command on a device to check telemetry subscription information. The command output is as follows:
[~CE]display telemetry subscription
Sub-name : Sub1
Sensor group:
Sensor-name Sample-interval(ms) State
Sensor1 1000 RESOLVED
Destination group:
Dest-name Dest-IP Dest-port State Vpn-name Protocol
Dest1 192.168.56.1 20000 RESOLVED - GRPC
Sub-state : PASSIVE
Total subscription number is : 1
Which of the following statements is incorrect?
Answer: C
Explanation:
Comprehensive and Detailed Explanation:
# Correct Interpretations from the Output:# (A) The subscription name is "Sub1" (Confirmed from output).# (C) The subscription is static (PASSIVE state indicates this).# (D) The sample interval is
1000ms (1 second).
# (B) Incorrect:
* The IP address "192.168.56.1" belongs to the destination server, not the local device.
# Reference: Huawei HCIE Datacom - Telemetry Subscription and Monitoring
NEW QUESTION # 130
......
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