If the Outgoing policy is disabled, which protocols must be allowed for users to access commonly used websites?

The choice highlighting HTTP, HTTPS, and DNS is correct because these protocols are essential for web browsing and domains resolution, which are fundamental to accessing commonly used websites.

HTTP (Hypertext Transfer Protocol) is the standard protocol used for transferring web pages on the Internet. When users access the web, their browsers use HTTP to request and receive data from web servers.

HTTPS (Hypertext Transfer Protocol Secure) is the secure version of HTTP, which encrypts the data exchanged between the user’s browser and the web server. It is paramount for secure communications, especially when personal information is being transmitted.

DNS (Domain Name System) is responsible for translating user-friendly domain names into IP addresses. Without DNS, browsers would be unable to locate the web servers associated with the domain names, rendering web browsing impossible.

The other options contain protocols that do not align with typical web access requirements. FTP (File Transfer Protocol) is primarily used for transferring files rather than browsing the web, and DHCP (Dynamic Host Configuration Protocol) is used for assigning IP addresses and does not directly influence web access.