One way to tell if a website is secure is by looking at the web address in the address bar of the Internet browser to see what letters the web address starts with.
Most sites start with http://. These letters stand for “Hypertext Transfer Protocol,” which is the basic way that information is transferred on the Internet. A secure web address starts with https://. This stands for Hypertext Transfer Protocol Secure. When a website starts with https:// it means that the information that is being transferred between your computer and the website is encrypted and secure.
B,D,E are the answers for your question :)
1.Configuring network hardware like servers, routers and switches.
2.Upgrading and repairing computer networks.
3.Troubleshooting network issues.
4.Assisting network architects with the design of network models.
5. Deploying and updating software.
Explanation:
Voice over IP (VoIP) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet.