Answer:
A. <Title> tag
Explanation:
Required
Tag that can be written in the <head> element
Of the given options, <title> is correct.
This is so because, it is compulsory to have the <title> tag and the only location where it can be placed is inside the <head> tag.
Its function is to display the title of a page
e.g.
<em><title> This is my first page </title></em>
Window is a vary popular operating system because of its runtime and compatible environment .
hope it help
Answer: Proxy server
Explanation: Proxy server is a type of server that is acts as interface between the network on huge scale and any local network. This server provides the feature of security, operations, privacy etc in the network system. They also help in improving the performance of the network.
It can work as the web filter to eliminate the unwanted websites.They acts as the gateway by observing the website that is being browsed by the other user.Thus installation of proxy server should implemented on the organization.