Final answer:
True, a proxy server screens all incoming and outgoing messages, providing functions like filtering, security, and caching to protect and optimize internet traffic.
Step-by-step explanation:
The statement that a proxy server screens all incoming and outgoing messages is True. A proxy server acts as an intermediary between a user's computer and the internet. It provides various functions, such as filtering, security, and cache data to speed up common requests. By doing so, it helps in screening and filtering internet traffic, which can enhance security by blocking access to malicious sites or content. Additionally, it can provide anonymity for users by masking their IP addresses.
A proxy server can be used to screen all incoming and outgoing messages, making it a valuable tool for managing network traffic and enhancing security. When a user sends a request, the message first goes to the proxy server, which then evaluates the request and forwards it to the appropriate destination. Similarly, when a response is received, it passes through the proxy server before reaching the user.
For example, in a corporate network, a proxy server can be set up to restrict access to certain websites or block malicious content. It can also cache frequently requested web pages, reducing the load on the network and improving browsing speed.