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Logical Networking Topologies > Logical Networking Topologies - Pg. 2

2 CHAPTER 1 Network Fundamentals Network Elements Although networks may provide similar functions, they can be very different. Some of the elements that will define your network and make it different from others include the following: Network interface cards (NIC) or network adapters allow computers to transmit and receive data across the network; routers, switches, and hubs pass the data to other computers or networks. Media consist of cables or wireless technologies that carry the data across the network. Protocols are sets of rules that control how the data is sent between comput- ers. The most popular of these is the protocol used on the Internet, Trans- mission Control Protocol/Internet Protocol (TCP/IP), while other protocols used on networks include Internetwork Packet Exchange/Sequenced Packet Exchange (IPX/SPX) and AppleTalk. Topology is the shape of the network. It defines how the network is designed and describes how computers are connected together. Network type defines the size of the network and its scale within a geographical area.