201 · Question #140
A Standard Virtual Server configured for an application reports poor network performance. This application is accessed mainly from computers on the Internet. What should the BIG-IP Administrator confi
The correct answer is A. Protocol Profile (Client) with f5-tcp-wan and Protocol Profile (Server) with f5-tcp-lan. To improve network performance for an Internet-facing application using a Standard Virtual Server, the BIG-IP Administrator should configure the client-side TCP profile with f5-tcp-wan and the server-side TCP profile with f5-tcp-lan.
Question
A Standard Virtual Server configured for an application reports poor network performance. This application is accessed mainly from computers on the Internet. What should the BIG-IP Administrator configure on the Virtual Server to achieve better network performance?
Options
- AProtocol Profile (Client) with f5-tcp-wan and Protocol Profile (Server) with f5-tcp-lan
- BProtocol Profile (Client) with f5-tcp-lan
- CProtocol Profile (Client) with fS-tcp-lan and Protocol Profile (Server) with f5-tcp-wan
- DProtocol Profile (Client) with f5-tcp-optimized
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Why each option
To improve network performance for an Internet-facing application using a Standard Virtual Server, the BIG-IP Administrator should configure the client-side TCP profile with f5-tcp-wan and the server-side TCP profile with f5-tcp-lan.
The f5-tcp-wan profile is specifically designed for optimizing connections over high-latency, potentially lossy wide area networks, which is typical for clients connecting from the Internet. The f5-tcp-lan profile is optimized for high-bandwidth, low-latency local area networks, which is appropriate for connections between the BIG-IP and backend application servers. This combination provides optimal performance by tailoring TCP optimizations to each segment of the connection.
Using only f5-tcp-lan on the client-side is unsuitable for Internet-based clients due to the inherent latency and potential packet loss over WAN connections, leading to poor performance.
This option incorrectly applies f5-tcp-lan to the client-side (WAN) and f5-tcp-wan to the server-side (LAN), which would degrade performance on both segments due to mismatched optimizations.
While f5-tcp-optimized exists, it's a general profile; the specific use of f5-tcp-wan and f5-tcp-lan on their respective segments (client/server) provides more tailored and effective optimization for this scenario.
Concept tested: BIG-IP TCP profile optimization for WAN/LAN
Source: https://techdocs.f5.com/en-us/bigip-15-1-0/big-ip-system-network-security/tcp-profiles.html
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