Internet sharing in the data network was done in an unplanned manner where two Internet connections were assigned to individual users, i.e. one connection per user, and the other two connections provided the rest of the data network , each connection assigned to a specific location, such as the sales department, has one connection and the drawing section has one connection, the Microsoft Sharing Internet Connection feature available free of charge in Windows client operating systems is used to share the Internet connection with other devices, in each section, by default this connection type will assign the gateway an IP address of 192.168.0.1/24 and by allowing clients to obtain dynamic IP addresses, they will all be assigned an IP address of this subnet, since it is used the same configuration in the other section, IP conflict occurs when the uplink cable is permanently connected. Therefore the link is used as a backup, with the cable only connected when the link on the other side fails. All connections use shielded twisted pair or unshielded Cat5e cable with a maximum speed of 100 Mbps. Although in practice this speed may be lower due to the effect of external factors affecting the line, such as electromagnetic current which may be transmitted from the heavy machinery in the shop area, so this may be one of the reasons why the network appears to be slow.4.2.1.1 HARDWARE DEVICES• ADSL Routers: There are four Belkin ADSL modems with integrated routers, the routing features are Simply designed for home use, they offer minimal security, network address translation, and Dynamic Host Control Protocol (DHCP) services.• Switches: All switches are entry level unmanaged switches. These sw...... middle of paper ......d switches, which do not have the capabilities to support port management or mirroring protocols, an alternative method was used to capture traffic and network data. use of the network. A hub was used at the main office near the switch connecting to the Internet machine. Internet sharing was disabled on one side, the backup uplink cable was connected and all traffic to and from the external network and servers was forced to go through the hub, figure 4.2 shows the network usage , although the figure only shows a small part, but the usage trend indicates that the network is not fully utilized and the bottlenecks causing slowdown may be caused by other factors such as Internet speed or interference on the cable signal . It was not possible to measure the interference on the line because the device for measuring the line was not available.