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The DI-604 combines the latest advancements in chip technology, low-cost design and manufacturing with new, feature-rich firewall and network management controls to give you quite possibly the most advanced, yet affordable Ethernet router to date. The Cable Diagnostic Utility feature is the latest utility included in the DI-604 for diagnosing cable connection problems with the wired Ethernet cable. This feature can indicate to users which Ethernet cable connected to the router has problems, identifying where and what the problem is.The DI-604 is ideal if you're creating your first home or small business network, or if you're a more advanced user looking for additional management settings. A simple, yet intelligent, web-based setup wizard makes the DI-604 easy for anyone to quickly and securely connect computers to share a high-speed Internet connection, files, resources, games or just to communicate.The DI-604 has an integrated 4-port switch with 10/100 Ethernet ports for directly connecting up to four computers. And one Ethernet cable is included with the DI-604, just to get you started.