Web hosting and cloud computing are related but distinct concepts. Here's a breakdown of the key differences between the two:

Web Hosting:
1. Definition: Web hosting refers to the service of storing and serving website files on a server connected to the internet. It enables individuals or businesses to make their websites accessible to users on the internet.
2. Server Infrastructure: Web hosting typically involves hosting websites on physical servers located in data centers. These servers may be shared (shared hosting) or dedicated (dedicated hosting) among multiple users.
3. Resource Allocation: In web hosting, resources such as CPU, RAM, and storage are allocated to individual hosting accounts or websites based on the chosen hosting plan. Each website or hosting account has its own allocated resources.
4. Scalability: Scalability in web hosting can be limited by the physical constraints of the server infrastructure. Upgrading resources or accommodating sudden traffic spikes may require migrating to a higher hosting plan or server.
5. Pricing Model: Web hosting plans often have fixed pricing models, where users pay a set fee for a specific resource allocation and feature set. Extra charges may apply for additional resources or add-on services.

Cloud Computing:
1. Definition: Cloud computing involves the delivery of computing resources, including servers, storage, databases, software, and more, over the internet. It enables users to access and utilize these resources on-demand without the need for local infrastructure.
2. Infrastructure: Cloud computing utilizes a network of interconnected virtual servers spread across multiple physical machines and data centers. The infrastructure is highly scalable and designed for flexibility and redundancy.
3. Resource Allocation: Cloud computing allows users to allocate and adjust resources (CPU, RAM, storage) dynamically as needed. Resources can be scaled up or down on-demand, ensuring optimal resource utilization and cost efficiency.
4. Scalability: Cloud computing offers high scalability due to its distributed nature. Users can easily scale resources up or down to meet changing demands without the need for physical hardware upgrades or migrations.
5. Pricing Model: Cloud computing typically follows a pay-as-you-go pricing model. Users are charged based on actual resource usage, allowing for more cost flexibility and the ability to align expenses with actual needs.

In summary, web hosting focuses on providing server space and services for hosting websites on physical servers, whereas cloud computing offers a flexible and scalable infrastructure with on-demand access to computing resources. Cloud computing goes beyond web hosting by providing a broader range of services and resources that can be dynamically allocated and scaled as needed.