What are metadata? Why are they important to sys- tem developers? What is the purpose of developing an identifier for an entity? What is meant by a concatenated identifier? Explain the distinction between identifying and nonidentifying relationships. Describe the three-step process of creating an inter- section entity. Describe the primary activities of the design phase of the SDLC. Describe the three primary strategies that are avail- able to obtain a new system. What circumstances favor the custom design strategy? What circumstances favor using outsourcing to obtain the new system? What is meant by customizing a software package? Explain the client–server architecture. Explain the difference between a symmetric encryp- tion algorithm and an asymmetric encryption algorithm. What is the purpose of the hardware and software specification? What do you think are the most important security issues for a system? What is meant by authentication? What is its role in securing transactions? 4. Explain the distinction between identifying and nonidentifying relationships.