[&] Why might Squid restrict access to a web application based on user agent, as shown in the demonstration?
- To ensure outdated browsers can access the application
- To monitor the speed of different browsers
- To block unauthorized users from specific applications
- To test the latency of Internet connections

[&] What must be set up to route requests through a Squid proxy server when working with domains?
- Correct DNS configuration
- Port mirroring
- Subnet forwarding
- Direct IP exceptions

[&] What is the primary function of Squid in a network environment?
- To serve as a firewall for local network devices
- To facilitate requests and responses between client devices and web servers
- To encrypt all outgoing web requests
- To optimize hardware performance within networks

[&] Which feature of Squid allows it to enhance web application security by blocking access to specific URLs?
- Load Balancing
- Domain Resolution
- Content Filtering
- Web Traffic Encryption

[&] In order to bypass a Squid proxy server restriction based on the user agent, what must be modified in the request?
- Source subnet mask
- User agent header
- Destination port number
- Request's IP address

[&] When using Squid, which common request error indicates that access to a URL is denied due to access control rules?
- Not Found
- Request Timeout
- Service Unavailable
- Access Denied