1. Definition
The client/server model is a way of organizing communication between computers on a network. In this model, one computer (the server) provides services or resources, and other computers (clients) request and use those services. The server is always ready to respond, while clients initiate contact.
2. Key Details
- Server: A powerful, always-on machine that waits for requests. It can serve many clients simultaneously.
- Client: Any device (PC, tablet, medical monitor) that sends requests and displays results. Clients do not communicate directly with each other.
- Communication follows a request-response pattern: client asks, server answers.
3. Advantages & Disadvantages
✅ Advantages
- Centralized management – easy to update software, enforce security, and back up data on the server.
- Scalability – you can add more clients without changing the server (up to a point).
- Security – sensitive data stays on the server, not on every client.
❌ Disadvantages
- Single point of failure – if the server goes down, all clients lose access.
- Can become expensive to maintain a powerful server and network infrastructure.
- Network congestion if too many clients request at once.
4. Use Cases in Medical Engineering
- Hospital Information System (HIS): A central server stores patient records, and doctors' workstations (clients) retrieve them.
- PACS (Picture Archiving and Communication System): Medical imaging servers store MRI/CT scans; radiologists view them on client workstations.
- Telemedicine platforms: Patients use apps (clients) to connect to a central server that manages consultations.
5. Special Tips / Recommendations
- Always have server redundancy (backup servers) to avoid downtime.
- Use strong authentication and encryption to protect patient data transmitted between client and server.
- Plan for peak loads (e.g., many doctors logging in at shift change).
6. Practical Implementation (Conceptual)
To set up a client/server system in a hospital:
- Choose a powerful computer to act as the server and install a server operating system (e.g., Windows Server, Linux).
- Install the necessary service software (e.g., database, PACS server, web server).
- Configure the network so that clients can reach the server (via IP address or hostname).
- On each client device, install client software that knows how to talk to the server (e.g., a medical imaging viewer).
- Test the connection and ensure data flows securely.
No programming is needed – commercial or open‑source solutions provide these components.