only answer about existing systems and potential RFI interference thank you. i need this in 30 mins please

Telecommunication systems enable the transmission of data over public or private networks. A network is a communications, data exchange, and resource-sharing system created by linking two or more computers and establishing standards, or protocols, so that they can work together. Telecommunication systems and networks are traditionally complicated and historically inefficient. However, businesses can benefit from today's modern network infrastructures that provide reliable global reach to employees and customers. Businesses around the world are moving to network infrastructure solutions that allow greater choice in how they go to market- solutions with global reach. These alternatives include wireless, voice-over internet protocol (VoIP), and radio-frequency identification (RFID). These days wireless networking products are so ubiquitous and inexpensive that anyone can easily build a wireless network with less than $100 worth of equipment. However, wireless networks are exactly that - wireless - they do not stop at walls. In fact, wireless networks often carry signals more than 300 feet from the wireless router. Living in an apartment, dorm, condominium, or house means that you might have dozens of neighbors who can access your wireless network. It is one thing to let a neighbor borrow a lawn mower, but it is another thing to allow a neighbor to access your wireless network. There are several good reasons for not sharing a wireless network including: Slows down Internet performance Allows others to view files on your computers and spread dangerous software such as viruses Allows others to monitor the Web sites you visit, read your e-mail and instant messages as they travel across the network, and copy your usernames and passwords Allows others to send spam or perform illegal activities with your Internet connection You are implementing a wireless network throughout the cafe so customers can connect and work while enjoying their latte. Create a document detailing what the networks (internal and external) should do and all of the features you can use to secure the cafe's wireless networks (internal and external) as well as adequately identify and analyze the needs of the user internal and external), existing systems, potential RF interference, and so on. Be sure to include a discussion on the ethical issues involved with customers using your wireless network