Proxy servers primarily provide which service?

Proxy servers primarily provide which service?

• A. It forwards requests on behalf of a client and can also cache responses
• B. It encrypts all traffic end-to-end for every application
• C. It routes DNS queries for a network
• D. It blocks all external connections

Answer: (A)

Proxy servers act as intermediaries between clients and destination servers. Their primary service is to forward requests on behalf of a client and, when possible, cache responses to speed up repeated access. Caching saves time and bandwidth by serving repeated requests from the local cache rather than going all the way to the destination server each time. Other descriptions don’t capture the main role of a proxy. Encrypting all traffic end-to-end for every application is more the realm of a VPN or end-to-end encryption setup, and while proxies can handle encrypted connections, they don’t automatically guarantee end-to-end security for all apps. Routing DNS queries is the job of a DNS resolver or DNS proxy, not a general proxy server. Blocking all external connections is a firewall or access-control function, not what a proxy primarily does.

Proxy servers act as intermediaries between clients and destination servers. Their primary service is to forward requests on behalf of a client and, when possible, cache responses to speed up repeated access. Caching saves time and bandwidth by serving repeated requests from the local cache rather than going all the way to the destination server each time.

Other descriptions don’t capture the main role of a proxy. Encrypting all traffic end-to-end for every application is more the realm of a VPN or end-to-end encryption setup, and while proxies can handle encrypted connections, they don’t automatically guarantee end-to-end security for all apps. Routing DNS queries is the job of a DNS resolver or DNS proxy, not a general proxy server. Blocking all external connections is a firewall or access-control function, not what a proxy primarily does.