That would be a star network. A star network isn't necessarily shaped like a star, of course, but like you mention this topology has a central device, usually a server of some sorts, and then many different endpoints coming out of that central device, such as the client computers for the server.
Answer: d)Phishing
Explanation: Phishing is the activity that is used by the attackers or unauthorized parties to steal confidential information of individuals through emails, messages or calls.This activity is considered as cyber-crime as the unauthorized source present themselves as the legal and actual party to gain private information such as credit card details, personal details , etc.
The example mentioned in the question about eBay's security issue is also related with phishing where the fraud mails are sent to the users to gain or steal their personal information.
Other options are incorrect because insider is a threat that happens in the organization or business field regarding the organizational data,dumpster diving is reviving data to execute an attack on operating system and social engineering is gaining personal information from an individual through manipulation .Thus, the correct option is option(d).
Phishing is a cybercrime in which a target or targets are contacted by email, telephone or text message by someone posing as a legitimate institution to lure individuals into providing sensitive data such as personally identifiable information, banking and credit card details, and passwords.
