QUESTION 3 a.List five common problems with TCP/IP in real network environment. Your explanation must be specific to the issues and relevant to the implementation large scale network. (5 marks) b.Ahmad has been appointed as a network designer at ABC Company. His first task was to improve an existing Local Area Network (LAN) for Human Resource department and at the same time expanding the network system that consist of three more departments namely, Technical Services department, Finance department and Utilities department. The management would like him to utilize the existing infrastructure with limited budget for network performance improvements. Below is the list of available devices: Two units of unmanaged switch Two units of hub One unit of Wifi Router One unit of Wifi Repeater 20 units of Cat5e cable 5 units of Personal Computer 2 units of Notebook/Laptop Analyze this situation and investigate five (5) possible combinations to justify the request made by superior's. (7 marks)