CV0-003 · Question #524
A systems administrator is troubleshooting network throughput issues following a deployment. The network is currently being overwhelmed by the amount of traffic between the database and the web…
The correct answer is B. Enable jumbo frames on the gateway. Enabling jumbo frames increases the MTU size, reducing per-packet overhead and improving throughput for high-volume server-to-server communication.
Question
A systems administrator is troubleshooting network throughput issues following a deployment. The network is currently being overwhelmed by the amount of traffic between the database and the web servers in the environment. Which of the following should the administrator do to resolve this issue?
Options
- ASet up affinity rules to keep web and database servers on the same hypervisor
- BEnable jumbo frames on the gateway
- CMove the web and database servers onto the same VXLAN
- DMove the servers onto thick-provisioned storage
How the community answered
(58 responses)- A7% (4)
- B71% (41)
- C3% (2)
- D19% (11)
Why each option
Enabling jumbo frames increases the MTU size, reducing per-packet overhead and improving throughput for high-volume server-to-server communication.
Affinity rules control VM placement on hypervisor hosts for performance or licensing reasons, but do not increase available network bandwidth or reduce congestion between servers.
Jumbo frames increase the Maximum Transmission Unit (MTU) from the standard 1500 bytes up to 9000 bytes, allowing far more data to be carried per packet. This directly reduces the total number of packets required to transfer large volumes of data between the database and web servers, lowering CPU overhead and alleviating network congestion. Enabling jumbo frames on the gateway propagates this optimization across the environment, making it an effective fix for throughput saturation.
VXLAN is a network overlay encapsulation protocol used for segmentation and multi-tenancy; placing servers on the same VXLAN does not increase bandwidth or reduce traffic volume.
Thick-provisioned storage pre-allocates disk space to improve storage I/O predictability, which has no effect on network throughput between servers.
Concept tested: Jumbo frames for network throughput optimization
Source: https://learn.microsoft.com/en-us/azure/virtual-network/virtual-network-tcpip-performance-tuning
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