Then you need to create an ip address exclusion on

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Then you need to create an IP address exclusion on your DHCP server for each address that's been used for static assignment. This prevents the DHCP server from assigning these addresses dynamically to other hosts. And if supported, you could configure your DHCP server to ping ahead before assigning an IP address. When this feature's enabled, it will cause a DHCP server to ping an IP address before it actually assigns it to a host, so, if it gets a response to the ping, the DHCP server knows that the address is already in use and that it should try another address. You can also specify in your organization's acceptable use policy document that end users are not allowed to statically assign IP addresses to network hosts without authorization. Summary 12:38-12:52 That's it for this lesson, in this lesson, we reviewed several issues that can affect wired networks, we looked at poor connectivity, we looked at no connectivity, we talked about slow data transfers, we looked at limited or local connectivity, and then we ended this lesson by talking about duplicate IP address errors. You should be able to perform some basic troubleshooting steps for network connections. Even if you are unable to fix the problem, taking the steps outlined below will at least help you identify the scope of the problem, which will help you know who to contact for additional help. Step Description Verify the network adapter Verify that your computer has detected and properly configured the network adapter card. To view a list of available network connections: o On Windows 7, Right-click the network icon in the notification area and click Properties . o On Windows 10, Right-click Start , and then click Network Connections . o Verify an Ethernet connection icon exists. If no Ethernet adapter is found, open Device Manager to make sure the device is detected, the appropriate driver is installed, and the device is enabled. Verify physical connectivity If you have a network connection in Windows, verify that the adapter can establish a physical connection to the network. For modems, try to establish the connection. Verify that you get a dial tone and that the destination computer answers the call. For Ethernet NICs, the network icon in the notification area can be used to identify the connection status. If the cable is unplugged, or if the NIC cannot find a connected device, the network icon will reflect this. Check the status lights on the back of the Ethernet NIC to verify the physical status. There should be a link light that is green. An unlit link light or one that is another color (like red or amber) indicates a physical connectivity problem. If you suspect a problem with the physical connection, try the following:
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Use a different network cable that you know works. You can use a cable tester or cable certifier to test the network cabling behind the wall (the cable between the wall jack and the punch-down panel). You can also use a tone generator (sometimes called a toner) and probe to trace the location of cables through the wall and ceiling.
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