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F5 ((4. Server Selection, F5 uses a load balancing method (e.g., round…
F5
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F5 uses a load balancing method (e.g., round-robin, least connections, ratio-based) to choose the most suitable pool member (backend server).
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It assigns a request to the first server, then moves to the second, third, and so on, and after reaching the last server, it starts again at the first.
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The Least Connections algorithm directs incoming requests to the server with the lowest number of active connections.
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It assigns different weights to servers based on their capacities and distributes requests proportionally to these weights.
- Weighted Least Connections
The Weighted Least Connections algorithm combines the Least Connections and Weighted Round Robin algorithms. It directs incoming requests to the server with the lowest ratio of active connections to assigned weight.
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The request arrives at the F5 Virtual Server (VIP), which is configured with:
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Associated profiles (TCP, HTTP, SSL, etc.)
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If SSL offloading is enabled, F5 decrypts the traffic before sending it.
To enable SSL offloading on an F5 BIG-IP system, you configure Client SSL and optionally Server SSL profiles on a virtual server.
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F5 applies traffic profiles to handle protocol-specific behaviors (e.g., decrypt SSL, manage HTTP headers, optimize TCP).
profiles define how specific types of traffic are processed by a virtual server. They provide a reusable set of settings for handling different protocols and features.
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Optionally, it may re-encrypt the data (SSL re-encryption) before sending it.
F5 BIG-IP is an advanced application delivery controller (ADC) that distributes network or application traffic across multiple servers to ensure high availability, reliability, and performance.
- Client Request Initiation
A user (client) sends a request (e.g., to a website) via HTTP, HTTPS, or another protocol.
6. Response from Server
The backend server processes the request and sends the response back to the F5 device.