Lab Report: 4.2.3 Reconnect to an Ethernet Network

Home , Network switch, Replace (command), Shutdown (computing), Wiring closet

Performance Your Score: 0 of 3 (0%) Elapsed Time: 11 seconds

Task Summary Actions you were required to perform: In Install the 100BaseTX network adapter In Connect the computer to the network using Cat5e cable In Verify that Office2 can communicate with the local network and the Internet Explanation In this lab, your task is to complete the following:

On the Office 2 workstation: Select and install a new networking card that provides Fast Ethernet speeds (a faster network card is not required). Connect the workstation to the local network using the appropriate cable. On the Office2 workstation, confirm that the workstation has a connection to the local network and the internet.

Complete this lab as follows:

1. Above the computer, select Motherboard to switch to the motherboard view of the computer. 2. In the Power Off warning, select Yes to turn off the computer. 3. On the Shelf, expand Network Adapters. 4. Identify the network adapter that supports Fast Ethernet 100BaseTX. 5. On the Shelf, drag the 100BaseTX network adapter to a free PCI slot on the computer. The 100BaseTX network adapter supports Fast Ethernet, which is all that is required.

6. Connect the computer to the network as follows: a. Above the computer, select Back to switch to the back view of the computer. b. Drag the Cat5 cable connector from the motherboard's NIC to the port of the 100BaseTX network adapter. 7. Verify the connection to the local network and the internet as follows: a. Above the computer, select Front to switch to the front view of the computer. b. Click the power button on the computer case. c. After the workstation's operating system is loaded, right-click the Network icon in the notification area and select Open Network and Sharing Center. The diagram should indicate an active connection to the network and the internet.

You can also confirm the speed of the connection by clicking Ethernet in the Network and Sharing Center. Lab Report: 4.3.3 Connect Network Devices

Performance Your Score: 0 of 4 (0%) Elapsed Time: 15 seconds

Task Summary Actions you were required to perform: In Connect the fiber network on Floor 1Hide Details

Connect the fiber SFP transceiver to the switch Connect the LC connector to the SFP transceiver on the switch Connect the SC A connector to port 3 on the fiber patch panel Connect the SC B connector to port 4 on the fiber patch panel

In Connect the fiber network on Floor 2Hide Details

Connect the LC connector to the SFP transceiver on the switch Connect the SC A connector to port 1 on the fiber patch panel Connect the SC B connector to port 2 on the fiber patch panel

In Plug the switch on Floor 2 into a Critical Load outlet In Computers on Floor 2 are connected to the Internet Explanation To determine the appropriate network components to use, examine the ports on the switch and the fiber patch panel. Because the switch doesn't have a fiber port, the SFP module with the LC fiber connector must be used.

The only cable that can be used to connect the switch and the server is the SC to LC fiber cable.

SC connectors have square connectors that are pushed in to connect.

LC connectors have both connectors linked together.

When connecting the fiber cable to the patch panel:

On Floor 1: Connect SC Connector A to port 3. Connect SC Connector B to port 4. On Floor 2: Connect SC Connector A to port 1. Connect SC Connector B to port 2.

Complete this lab as follows: 1. On the Shelf, expand the Adapters category. 2. Drag the SFP Transceiver (LC) to an open SFP port on the switch. 3. Connect the fiber cable to switches on Floor 1 as follows: a. On the Shelf, expand Cables. b. Drag the SC to LC fiber cable to the SFP LC port on the switch. c. In the Select Connector window, select the LC connector. d. In the Selected Component pane, drag the SC Connector (A) to port 3 on the fiber patch panel. e. In the Selected Component pane, drag the SC Connector (B) to port 4 on the fiber patch panel. 4. Connect the fiber cable to switches on Floor 2 as follows: a. From the top menu, select Building A. b. Under Building A, select Floor 2. c. Under Networking Closet 2, select Hardware. d. On the Shelf, expand Adapters. e. Drag the SFP Transceiver (LC) to an open SFP port on the switch. f. On the Shelf, expand Cables. g. Drag the SC to LC fiber cable to the SFP LC port on the switch. h. In the Select Connector window, select the LC connector. i. In the Selected Component pane, drag the SC Connector (A) to port 1 on the fiber patch panel. j. In the Selected Component pane, drag the SC Connector (B) to port 2 on the fiber patch panel. 5. Plug the switch on Floor 2 into a bank 1 critical load outlet on the UPS as follows: a. Above the rack, select Back to switch to the back view of the rack. b. On the Shelf, drag the AC Power Cable. c. In the Select Connector window, drag AC Power Connector (Female) to the AC port on the back of the switch. d. In the Selected Component pane, drag the AC Power Connector (Male) to an open bank 1 critical load outlet. e. Above the rack, select Front to switch to the front view and confirm the network switch has power. 6. Verify that there is an internet connection for any Floor 2 computer as follows: a. From the top menu, select Floor 2. b. Select any of the computers on Floor 2. c. In the notification area, right-click the Network icon and select Open Network and Sharing Center. d. Confirm that the computer has an internet connection. 7. Click Done to finish the lab. Network Pro Lab 4.4.5

Performance Your Score: 0 of 3 (0%) Elapsed Time: 8 seconds

Task Summary Actions you were required to perform: Move the network cable to the good NIC on ExecHide Details Cable connected to good NIC on motherboard Exec connected to network Replace faulty cable to Office1Hide Details Faulty cable removed Computer is connected to network Plug Switch into Critical Load Bank outlet

Explanation

Complete this lab as follows:

1. Under Networking Closet, select Hardware. 2. Zoom in on the Cisco switch in the rack to view the power and network activity lights. When a component's power light is on (the left light), you know the device is plugged in and turned on. The network activity light (the right light) tells you which ports are connected to an active device. When this light is blinking, you know that network traffic is being transmitted through the port.

At this point, notice the following:

o Port 1: Has no lights illuminated o Port 2: Is not being used o Port 3: Has no lights illuminated o Port 4: The power light is illuminated and the network activity light is blinking o Port 5: The power light is illuminated and the network activity light is blinking

By selecting each of the above ports, you can see which computer is utilizing the highlighted port. As a result, you can conclude that there is something preventing the Office1 and ITAdmin computers form having network connectivity.

3. On the ITAdmin workstation, ping each of the following computers using the IP addresses shown: Network Pro Lab 4.4.5

Computer name IP Address

Office1 192.168.0.30

Exec 192.168.0.34

CorpServer 192.168.0.10

Building A router 192.168.0.5

CorpNet Router's internal interface 198.28.56.1

CorpNet Router's external interface 198.28.56.17

ISP 65.86.1.1

a. From the top navigation tabs, select Floor 1 Overview. b. Under IT Administration, select ITAdmin. c. Right-click Start; then select Command Prompt (Admin). d. Run: ping ip_address e. Repeat step 3d for each remaining IP addresses.

When you ping from ITAdmin, you are able to ping all of the devices except for the Office1 and Exec computers. This indicates connectivity throughout the network except to those workstations.

4. On ITAdmin, with the network cable plugged in, check the network connectivity as follows: . Look at the Network icon in the notification area. This icon indicates a normal network connection a. Select the Network icon. You are now shown the networks to which this computer is connected. b. Right-click the Network icon and select Open Network and Sharing Center. . Under View your active networks, the Local Area Connection is shown. . The Network and Sharing Center indicates a connection to the internet. c. Under Internet, select Ethernet to view the connection status and connection details; then close both the Ethernet Status and Network and Sharing Center dialogs. d. From the top navigation tabs, select IT Administration to view the hardware of the computers in this office. e. Above the ITAdmin workstation (not the monitor), select Back. . The link light for the network card is illuminated, indicating a physical connection (link) between this workstation and the next device (the network switch). . The network activity light is blinking, indicating that network traffic is being transmitted on this connection. 5. On ITAdmin, disconnect the network cable and then check the network connectivity as follows: . From the back view of the ITAdmin workstation, drag the Ethernet cable connected to the Ethernet port away from the workstation to disconnect it. The link and network activity lights are no longer illuminated? a. On the ITAdmin monitor, select Click to view Windows 10. b. Ping the following addresses: . Office1: 192.168.0.30 Network Pro Lab 4.4.5

. CorpNet Router's internal interface: 198.28.56.1 You are unable to ping either of theses addresses, indicating a communication issue? c. In the notification area of the taskbar, view the Network icon. The icon now indicates that it has no connection to the network. d. Right-click on the Network icon and select Open Network and Sharing Center. The Network and Sharing Center indicates you are not connected to any networks. 6. In the Networking Closet, examine the current link and network activity lights for ITAdmin as follows: . From the top navigation tabs, select Floor 1 Overview. a. Under Networking Closet, select Hardware. b. Zoom in on the Cisco switch in the rack to view the power and network activity lights for the ITAdmin workstation. Notice that there are not lights illuminated on port 5 (ITAdmin). 7. On ITAdmin, plug the Ethernet cable back into the onboard Ethernet port as follows: . From the top navigation tabs, select Floor 1 Overview. a. Under IT Administration, select Hardware. The back view of the workstation is still shown. b. Locate and select the Ethernet cable previously unplugged. c. Drag the unconnected end of the Ethernet cable to the onboard Ethernet port on the ITAdmin workstation. Notice that the link and network activity lights are once again illuminate. 8. On Exec, check the network connectivity as follows: . From the top navigation tabs, select Floor 1 Overview. a. Under Executive Office, select Exec. b. From the notification area of the taskbar, view the Network icon. The network icon in the notification area indicates that the device is not connected. c. Select the Network icon. No network connections are shown. d. Right-click the network icon and select Open Network and Sharing Center. The Network and Sharing Center indicates that there is no connection to the internet. e. From the top navigation tabs, select Executive Office to view the hardware for the computers in this office. f. Above the Exec workstation, select Back. The link and network activity lights for the Ethernet port with a cable plugged in are not illuminated. This indicates there is no connection to the switch.

Possible causes for no connectivity include: . A faulty or disconnected cable . A bad network card (NIC) . A faulty or disabled switch port 9. On Exec, eliminate the possibility of a bad NIC by dragging the network cable from the existing network card to the onboard port. . From the top navigation tabs, select Executive Office. a. Above the Exec workstation, select Back. b. Drag the Ethernet cable from its existing location to the Ethernet onboard port. The link and network activity lights are now on and flashing, indicating an active connection. The first NIC is probably bad or was installed incorrectly. 10. On Exec test the network connection to the following devices as follows: . On the Exec monitor, select Click to view Windows 10. a. Right-click Start; then select Command Prompt (Admin). b. Ping each of the following: . Office2: 192.168.0.31 . Gst-Lab: 192.168.0.35 . Office1: 192.168.0.30 . The ISP: 65.86.1.1

From the Exec computer, you are now able to ping all of the devices on the network except Office1. This indicates that connectivity has been restored to the Exec computer. 11. In the Networking Closet, check the link light status as follows: Network Pro Lab 4.4.5

. From the top navigation tabs, select Floor 1 Overview. a. Under Networking Closet, select Hardware. The network activity lights on the switch are blinking for all ports except port 3 (Office1). 12. On Office1, check the network connectivity as follows: . From the top navigation tabs, select Floor 1 Overview. a. Under Office 1, select Hardware. b. Above the workstation, select Back. The link and network activity lights are not illuminated, indicating that there is no connection to the switch.

Possible causes for no connectivity include: . A faulty or disconnected cable . A bad network card (NIC) . A faulty or disabled switch port 13. Test the network cable for Office1 as follows: . Unplug the existing Ethernet cable from the wall plate and from the back of the computer. a. From the Shelf, expand Cables. b. Select the Cat5e Cable (a known good cable). c. Plug one end of the new Ethernet cable into the Ethernet port in the computer and the other end into the wall plate. The link and network activity lights on the NIC still don't show an active connection. Therefore, the cable in the office wasn't the problem. 14. Test the network patch cable for Office1 in the wiring closet as follows: . From the top navigation tabs, select Floor 1 Overview. a. Under Networking Closet, select Hardware. b. Remove the existing patch cable from Off 1 and from port 3. c. From the Shelf, select the Cat5e Cable. d. Plug one end of the new Ethernet cable into the Off 1 port and the other end into a port 3 on Cisco switch. The link and network activity lights for port 3 indicates an active connection. The patch cable in the Network Closet was the problem. 15. On Office1, test the network connection to the following devices as follows: . From the top navigation tabs, select Floor 1 Overview. a. Under Office 1, select Office1. b. Right-click Start; then select Command Prompt (Admin). c. Ping the following devices: . Office2: 192.168.0.31 . ITAdmin: 192.168.0.33 . Exec: 192.168.0.34 . ISP: 65.86.1.1 You are now able to ping all devices verifying local and internet connectivity. d. (Optional) From the notification area, right-click the network icon and select Open Network and Sharing Center. The Network and Sharing Center indicates a connection to the internet. 16. In the Networking Closet, disconnect the power plug from the wall outlet and view the results as follows: . From the top navigation tabs, select Floor 1 Overview. a. Under Networking Closet, select Hardware. b. Remove the UPS power cable from the wall outlet. c. The following changes are evident: . All of the link lights are off . The CorpServe monitor is running . The CorpiSCSI monitor is off

CorpServer and its monitor are still on because they are plugged into the critical load bank section of the UPS. There are no network activity lights, indicating no network communications. Network Pro Lab 4.4.5

17. On CorpServer, ping Office1 and the CorpNet router's internal interface as follows: . On the CorpServer monitor, select Click to view Windows Server 2016. a. Right-click Start; then select Command Prompt (Admin). b. Ping the following devices: . Office1: 192.168.0.30 . The CorpNet Router's internal interface: 198.28.56.1 You are unable to ping any device on the network. c. Right-click the Network icon and select Open Network and Sharing Center. 18. In the Networking Closet, move the male AC Power Connector for the switch from the non-critical load bank section to the critical load bank section as follows: . From the top navigation tabs, select Networking Closet. a. Above the rack, select Back. b. Locate the male AC Power Connector for the switch from the non-critical load bank section (on the left) to the critical load bank section (on the right). To identify the correct male AC Power Connector, select the power cable connected to the back of the switch (top); the other end of the cable will be outlined in the non-critical load bank section. c. Move the applicable cable to the critical load bank. 19. In the Networking Closet, switch to the Front view of the rack and observe any changes as follows: . Above the rack, select Front. a. View the link and network activity lights. The switch is now receiving power from the UPS battery. There are network activity lights on the switch including ports 23 and 24. The router and wireless access point are on because they are plugged into the critical load bank on the UPS. b. Notice that power has not been restored to the CorpiSCSI monitor. 20. On CorpServer, test network connectivity as follows: . On the CorpServer monitor, select Click to view Windows Server 2016. a. Right-click Start; then select Command Prompt (Admin). b. Ping the following devices: . Office1: 192.168.0.30 . The CorpNet Router's internal interface: 198.28.56.1 . The ISP: 65.86.1.1 You are now able to connect to the above devices and the internet. 21. In the Networking Closet, reconnect the AC power cord from the UPS back to the wall outlet as follows: . Above the rack, select Back. a. Select the power cable on the UPS. The male end is shown in the Selected Components section. b. Drag the male connector to the wall plate. c. Power on the monitor for the CorpiSCSI server. With this server now receiving power from the wall plate, it and its server can now be accessed.

Lab Report: 4.4.6 Troubleshoot Physical Connectivity 1

Your Performance

Your Score: 0 of 1 (0%) Pass Status: Not Passed Elapsed Time: 6 seconds Required Score: 100%

Task Summary Actions you were required to perform: In In the Networking Closet, replace the patch cable for Office 2 Explanation Following are steps an expert might take to troubleshoot this problem:

1. In Office 1, ping each workstation in the network. This should verify the connectivity problem between Office 1 and Office 2 (pinging the computers in the Networking Closet and Lobby succeeds, but the ping to Office 2 fails). The scope of the problem could be isolated to the computer in Office 2. 2. In Office 2, ping each workstation in the network. Each ping attempt fails regardless of the remote workstation. Again, the scope of the problem could be isolated to the computer in Office 2. 3. In the Networking Closet, confirm that the scope of the problem is limited to Office 2 by pinging each workstation in the network (pinging Office 1 and Lobby succeeds, but the ping to Office 2 fails). 4. In Office 2, check the network connection in the Networking and Sharing Center or the status lights on the NIC. The diagram in the Network and Sharing Center shows the network connection as disconnected from any network, and the link and status lights on the NIC also show it is disconnected. A disconnected status is displayed when the NIC does not have a connection to the network. Possible causes for a disconnected status include: Bad NIC Faulty cable Unplugged cable Switch or hub port either disabled or faulty Because the scope of the problem is currently limited to the Office 2, you should look for common errors or solutions that you can try quickly. 5. Confirm that the network cable is connected to the NIC and the wall plate. Both ends of the cable are connected correctly. 6. In Office 2, replace the cable between the workstation and the wall plate. After you replace the cable, the disconnected status is still displayed in the Network and Sharing Center. You could replace the NIC in Office 2, but you should continue to replace cables because you can test the results quickly. 7. In the Networking Closet, check the switch to ensure that it is powered on. The power light for the device indicates that it is powered on. Also, since Office 1 can communicate through the switch, you know that the device is not turned off. 8. In the Networking Closet, observe the activity lights for all ports on the switch. There are activity lights for other ports, yet there is a lack of activity for Port 4. Possible causes include: The cable between Office 2's patch panel port and the switch is bad or disconnected. Port 4 on the switch is disabled or shutdown. 9. In the Networking Closet, confirm that the network cable is connected to Office 2's patch panel port and the switch. Both ends of the cable are connected correctly. 10. In the Networking Closet, replace the patch panel cable, as you can test this solution quickly. The activity light for Port 4 now indicates network activity. 11. In Office 2, check the network connection in the Networking and Sharing Center or the status lights on the NIC. The diagram in the Network and Sharing Center shows a connection to the network and internet, and the link and status lights on the NIC also show it is functioning normally. 12. In Office 2, ping each workstation in the network. Each ping attempt succeeds regardless of the remote workstation. 13. In Office 1, ping Office 2 to confirm the resolution of the original problem. The ping attempt is successful.

Replacing the NIC in Office 2 and making a console connection to the switch to confirm if port 2 is disabled are two viable approaches for this problem. Yet, as indicated earlier, you should look for common errors or solutions that can you can test quickly.

Admin Use Only: NP446B Lab Report: 4.4.7 Troubleshoot Physical Connectivity 2

Your Performance

Your Score: 0 of 1 (0%) Pass Status: Not Passed Elapsed Time: 8 seconds Required Score: 100%

Task Summary Actions you were required to perform: In In the Support Office, add a new NIC and connect the Ethernet cable to the new NIC Explanation In this lab, your task is to complete the following:

Use the following troubleshooting tools to diagnose the problem in the network: The ping command utility The network activity lights for all networking devices The Network and Sharing Center in the Windows 10 or Windows 2016 operating system Fix the problem. Use the known good spares on the Shelf as necessary. Use the troubleshooting tools to confirm the resolution of the problem.

Complete this lab as follows:

1. In the Support Office, ping the workstation in the IT Administration office and other workstations in the network (pinging all other workstations in the network fails). With the information from the Support manager and these ping results, the scope of the problem may be isolated to the workstation in the Support Office. 2. In the IT Administration office, verify the problem by pinging the workstation in the Support Office and other workstations in the network (pinging all other workstations in the network is successful, but the ping to the Support workstation fails). This verifies that there is connectivity between all other workstations in the network, except for the Support Office. This confirms that the scope of the problem is limited to the Support Office. 3. In the Support Office, open the Networking and Sharing Center or view the status lights on the NIC. The diagram in the Network and Sharing Center shows the network connection as disconnected from any network, and the link and status lights on the NIC also show it is disconnected. A disconnected status is displayed when the NIC does not have a connection to the network. Possible causes for a disconnected status include: Bad NIC Faulty cable Unplugged cable Switch or hub port either disabled or faulty 4. Because the scope of the problem is currently limited to the Support Office, you should look for common errors or solutions that you can test quickly. Confirm that the network cable is connected to the NIC and the wall plate. Both ends of the cable are connected correctly. 5. In the Support Office, replace the cable between the workstation and the wall plate. After you replace the cable, the disconnected status is still displayed in the Network and Sharing Center. You could replace the NIC in the Support Office, but you should continue to replace cables because you can test those results quickly. 6. In the Networking Closet, check the switch to ensure that it is powered on. The power light for the device indicates that it is powered on. Also, since the workstation in the IT Administration office can communicate through the switch, you know that the device is not turned off. 7. In the Networking Closet, observe the activity lights for all ports. There are activity lights for other ports, yet there is a lack of activity for Port 6. Possible causes include: The cable between the Support Office's patch panel port and the switch is bad or disconnected. Port 6 on the switch is disabled or shut down. 8. In the Networking Closet, confirm that the network cable is connected to Support Office's patch panel port and the switch. Both ends of the cable are connected correctly. 9. In the Networking Closet, replace the patch panel cable, as you can test this solution quickly. The activity light for Port 6 still does not indicate network activity. Making a console connection to the switch to confirm that port 6 is disabled is a viable approach for this problem, but the lab does not provide a console application to confirm the switch's port settings.

10. In the Support Office, open the case and add a known good spare NIC. 11. Connect the cable to the new NIC and power on the workstation. 12. In the Support Office, check the Networking and Sharing Center or the status lights on the NIC. The diagram in the Network and Sharing Center shows a connection to the network and internet, and the lights on the NIC also show it is functioning normally. 13. In the Support Office, ping each workstation in the network. Each ping attempt now succeeds regardless of the remote workstation. Lab Report: 4.4.8 Troubleshoot Physical Connectivity 3

Performance Your Score: 0 of 1 (0%) Elapsed Time: 7 seconds

Task Summary Actions you were required to perform: In In the Networking Closet, remove the switch's power cable from a non-critical load (Bank 2) outlet over to an empty critical load (Bank 1) outlet

Explanation Complete this lab as follows:

1. In the Executive Office, complete the following: a. Begin troubleshooting by verifying the connectivity problem between the workstation and all other workstations in the network (pinging to all other workstations in the network fails). b. Check the Network and Sharing Center or the status lights on the NIC. The diagram in the Network and Sharing Center shows the network connection as disconnected from any network. The link and status lights on the NIC also show it is disconnected. c. Brainstorm possible causes for a disconnected status. Some possibilities include the following: Bad NIC Faulty cable Unplugged cable Switch or hub port either turned off or faulty d. Look for common errors or solutions that you can test quickly. Confirm that the network cable is connected to the NIC and the wall plate. (Both ends of the cable are connected correctly.) 2. In the Support Office, complete the following: a. Repeat the same troubleshooting steps you took in the Executive Office to duplicate results and discover the scope of the problem.

With matching information from each office's workstation, the scope of the problem is shared between these two workstations and is likely shared with other workstations. Because the scope of the problem includes two offices, you should look for common errors or solutions that you can test quickly.

3. In the Networking Closet, complete the following: 1. Check the switch to ensure that it is powered on. The system light for the device indicates that it is powered off. Since the workstations in the Support Office and the Executive Office could not ping in the network, you can conclude that the device is turned off. 2. Above the rack, select Back to switch to the back view of the rack. 3. Check the power cable of the switch to ensure that it is plugged into the UPS. The switch is plugged into the UPS, but it is not plugged into the critical load section. 4. Move the power cable from the non-critical load (Bank 2) outlet to an empty critical load (Bank 1) outlet. 5. Above the rack, select Front to switch to the front view of the rack. 6. Observe the power light and activity lights for all ports on the switch. The lights are all on and active (except for the wireless access point, as it is still connected to the non-critical load [Bank 2] on the UPS). 4. In the Executive Office or the Support Office, complete the following: a. Check the Network and Sharing Center or the status lights on the NIC. The diagram in the Network and Sharing Center shows a connection to the network and internet. The lights on the NIC also show that it is functioning normally. b. Ping each workstation in the network. Each ping attempt now succeeds. Lab Report: 4.4.9 Troubleshoot Physical Connectivity 4

Your Performance

Your Score: 0 of 1 (0%) Pass Status: Not Passed Elapsed Time: 8 seconds Required Score: 100%

Task Summary Actions you were required to perform: In In Office 1, plug the network cable back into the motherboard's NIC and confirm the connection to the network and the Internet

Explanation Do the following:

1. In Office 1, begin troubleshooting the problem by verifying the connectivity problem between the workstation and computer in the Networking Closet (pinging the computer in the Networking Closet fails). 2. In Office 1, check the Networking and Sharing Center or the status lights on the NIC. The diagram in the Network and Sharing Center shows the network connection as disconnected from any network, and the link and status lights on the NIC also show it is disconnected. A disconnected status is displayed when the NIC does not have a connection to the network. Possible causes for a disconnected status include: Bad NIC Faulty cable Unplugged cable Switch or hub port either turned off or faulty 3. Because the scope of the problem is currently limited to the Office 1, you should look for common errors or solutions that can be tried quickly. When the user added the speakers, she may have knocked the networking cable loose and disconnected it on accident. Confirm that the network cable is connected to the NIC and the wall plate. The network cable is plugged into the wall plate, but not to the motherboard's NIC. 4. In Office 1, connect the network cable back into the motherboard's NIC. 5. Check the status lights on the NIC. The lights show the connection is functioning normally. 6. In Office 1, check the Networking and Sharing Center diagram. 7. Ping the computer in the Networking Closet. The diagram in the Network and Sharing Center shows a connection to the network and internet, and the ping to the computer in the Networking Closet succeeds.