For the Unit 3 Complete assignment, write a narrative essay (minimum of 1200 words) which addresses the questions and statements below. When finished, the essay should demonstrate a thorough understanding of the READ and ATTEND sections. A minimum of three scholarly sources are required, and all sources should be cited and referenced in APA format. 

• What are the principal components of telecommunications networks and key networking technologies? How are modern telephone and computer networks different from what firms used in the past?
• What are some of the common types of physical transmission media and what differentiates them from one another?
• What are the security challenges faced by wireless networks?
• How do enterprise systems help businesses achieve operational excellence?
• Refer to the case study at the end of chapter nine, Clemens Food Group Delivers with New Enterprise Applications. Was SAP S / 4HANA a good solution for Clemens Food Group? Explain your answer.