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MAN                                                 MAN





                                                               LAN



                                            MAN

                                                                                               MAN





                                                 Figure 6.13 Wide Area Network (WAN)


            6.5 Network Devices

            Creating a network requires several network devices, each playing a specific role. In the following paragraphs, we
            discuss some important network devices.

            6.5.1 RJ45 Connector

            RJ45 (RJ denotes Registered Jack, and 45 refers to an interface standard) connector is used to connect the devices
            to the network cables. An RJ45 connector has eight pins connected to eight wires of the incoming cable. An RJ45
            connector (plugs) fits into RJ45 jacks, as shown in Figure 6.14. RJ45 connectors are attached to Ethernet cables for
            connecting computers to the local area networks.









                          RJ-45 Plug                      RJ-45 Jack            RJ-45 Plug   RJ-45 Jack
                                                    Figure 6.14 RJ45 plug and jack

            6.5.2 Network Interface Card (NIC)

            A network interface card is a piece of hardware (also known as a network adapter, network interface controller, or
            LAN adapter)  that allows a computer to connect to a network. It is a circuit board installed in a Peripheral Component
            Interconnect (PCI) expansion slot on a computer’s motherboard.  NIC supports both wired and wireless communications.
            Following are the two types of NICs:
            1.  Wired (Ethernet)
            2.  WiFi Card

            Ethernet Card

            Ethernet cards, also known as Ethernet adaptors, connect networks using cables. They provide high-speed network
            connections in the range of 10 Mbps to 10 Gbps.

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