$3\mathrm{.}3.$ You are the IT manager for a growing financial firm planning to expand its office space and upgrade its network infrastructure. Since the firm's operations rely heavily on fast, secure$,$ and stable data transmission$-$particularly for stock trading and handling sensitive customer information$-$you must make a critical decision regarding the type of cabling to use in the new office layout.

Your task is to compare the use of fiber optic cables and twisted pair cables for the network upgrade, taking into account the firm's priorities of cost$-$effectiveness, network speed, reliability, and future$-$proofing the infrastructure to support high data transfer rates over time. You will need to make a recommendation based on several factors, including installation and maintenance costs, speed and data transmission capabilities, resistance to interference, security concerns, and durability, as well as the suitability of each option for connecting the firm's various departments, data centers, and external offices.

You are required to evaluate the strengths and limitations of both cabling options while considering immediate needs and future growth, ultimately leading to a detailed recommendation on which cabling system to implement in different areas of the office. $(25$ Marks$)$