Contents ix
202-10006-01
Troubleshooting Internet Browsing . .........................................................................8-6
Troubleshooting a TCP/IP Network Using the Ping Utility .............................................. 8-7
Testing the LAN Path to Your Router .......................................................................8-7
Testing the Path from Your Computer to a Remote Device .....................................8-8
Restoring the Default Configuration and Password ........................................................8-9
Using the Reset button .............................................................................................8-9
Problems with Date and Time .........................................................................................8-9
Appendix A
Technical Specifications
Appendix B
Network and Routing Basics
Related Publications .................................................................................. .................... B-1
Basic Router Concepts ....................................................................................... ........... B-1
What is a Router? . .................................................................................................. B-2
Routing Information Protocol ................................................................................... B-2
IP Addresses and the Internet ................................................................................. B-2
Netmask .................................................................................................................. B-4
Subnet Addressing ................................................................................................. .B-5
Private IP Addresses ............................................................................................... B-7
Single IP Address Operation Using NAT ................................................................. B-8
MAC Addresses and Address Resolution Protocol ................................................. B-9
Related Documents ................................................................................................. B-9
Domain Name Server ............................................................................................ B-10
IP Configuration by DHCP ........... ... ... .... ... ... ... ... .... ... ... ... .... ... ... ............................ B-10
Internet Security and Firewalls .................................................................................... B-10
What is a Firewall? .............................................................................................. ...B-11
Stateful Packet Inspection ......................................................................................B-11
Denial of Service Attack ................................................................... ......................B-11
Ethernet Cabling ................................................................................................. .... ... ... B-11
Category 5 Cable Quality ................................................................. ..................... B-12
Inside Twisted Pair Cables .................................................................................... B-13
Uplink Switches, Crossover Cables, and MDI/MDIX Switching ............. ...............B-14
Appendix C
Preparing Your Network
Preparing Your Computers for TCP/IP Networking ....................................................... C-1