Event ID - 4

Event Id4
Sourceb57w2k
DescriptionBroadcom NetXtreme Gigabit Ethernet: The network link is down. Check to make sure the network cable is properly connected.
Event InformationThis information from some newsgroups may help you:
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This addresses why you might want to use full duplex (and what some of the cons are too). But it has some other interesting information as well. If you want to see if you are at 10 or 100 (or whatever) Mbps you can do the following:
1. Open control panel
2. Select "Network and Internet Connections"
3. Select "Network Connections"
4. Select (highlight) the "Local Area Connection" (or if you have bridged connections select that)
5. Select "View status of this connection"
6. Look for the line "Speed:" the number indicated is the connections speed. This event may be logged, if you remove network cable to a PC from hub or from Pcs NIC or check any problem with cable.
Reference LinksHow to troubleshoot network connectivity problems

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