NSE4 · Question #8
Which statements are true regarding the use of a PAC file to configure the web proxy settings in an Internet browser? (Choose two.)
The correct answer is C. The browser can automatically download it from a web server. D. Can include a list of destination IP subnets where the browser can connect directly to without. PAC files enable browsers to automatically download proxy configuration from a web server and can contain logic to direct traffic to specific proxies or allow direct connections based on destination subnets.
Question
Which statements are true regarding the use of a PAC file to configure the web proxy settings in an Internet browser? (Choose two.)
Options
- AOnly one proxy is supported.
- BCan be manually imported to the browser.
- CThe browser can automatically download it from a web server.
- DCan include a list of destination IP subnets where the browser can connect directly to without
How the community answered
(27 responses)- A4% (1)
- B4% (1)
- C93% (25)
Why each option
PAC files enable browsers to automatically download proxy configuration from a web server and can contain logic to direct traffic to specific proxies or allow direct connections based on destination subnets.
PAC files are designed to support complex logic, including the ability to specify multiple proxy servers for redundancy or load balancing, not just a single proxy.
While some browsers might offer an option to specify a local PAC file, the common and intended method for PAC file deployment is for the browser to fetch it from a web server via a URL, rather than a manual import process.
Internet browsers are configured to retrieve a PAC file from a specified URL, allowing them to automatically download and apply the proxy configuration rules provided in the script.
A PAC file contains a JavaScript function that can evaluate destination IP addresses or hostnames, allowing it to define which traffic should bypass the proxy and connect directly to certain destination subnets.
Concept tested: PAC file functionality
Source: https://docs.fortinet.com/document/fortigate/7.4.0/fortios-handbook/606977/explicit-web-proxy-with-pac
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