Can you list the main types of network requests used in communication between a client and a server?

The main types of network requests used in client-server communications typically correspond to HTTP methods:

• GET — request to retrieve data from the server.
• POST — send data to the server to create a resource.
• PUT — update an existing resource on the server.
• DELETE — delete a resource.
• PATCH — partially update a resource.
• HEAD — retrieve only response headers without the body.

In iOS, these requests are usually performed using URLSession, for example:

let url = URL(string: "https://api.example.com/items")!
var request = URLRequest(url: url)
request.httpMethod = "GET"

let task = URLSession.shared.dataTask(with: request) { data, response, error in
    // handle response
}
task.resume()

These methods facilitate client-server interaction via REST or other protocols.