Answer:
Option d): Proxy Server is the correct answer.
Step-by-step explanation:
Proxy Server can be used to cache requested Internet resources so that they can be more quickly delivered to users requesting the same resource while at the same time reducing the burden on the external network connection to the Internet for an organization.
Working of Proxy Server:
These servers work by saving all the files into the servers that are uploaded by other persons once. After that whenever someone needs the same file, it is provided by the proxy server itself rather than the actual stored location of the file. Thus it somehow speeds up the delivery process.
I hope it will help you!