Contents vii
202-10037-01, March 2005
Troubleshooting the ISP Connection .............................................................................. 7-4
Troubleshooting a TCP/IP Network Using a Ping Utility ................................................. 7-5
Testing the LAN Path to Your Router .......................................................................7-5
Testing the Path from Your Computer to a Remote Device .....................................7-6
Restoring the Default Configuration and Password ........................................................7-7
Problems with Date and Time .........................................................................................7-7
Appendix A
Technical Specifications
Appendix B
Network and Routing Basics
Related Publications .................................................................................. ....................B-1
Basic Router Concepts ....................................................................................... ...........B-1
What is a Router? . .................................................................................................. B-1
Routing Information Protocol ................................................................................... B-2
IP Addresses and the Internet ................................................................... .................... B-2
Netmask .................................................................................................................. B-4
Subnet Addressing ................................................................................................. .B-4
Private IP Addresses ............................................................................................... B-7
Single IP Address Operation Using NAT ....................................................................... B-7
MAC Addresses and Address Resolution Protocol ................................................. B-8
Related Documents ................................................................................................. B-9
Domain Name Server .............................................................................................. B-9
IP Configuration by DHCP ........................................................................................... B-10
Internet Security and Firewalls .................................................................................... B-10
What is a Firewall? .............................................................................................. ..B-10
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
What You Need To Use a Router with a Broadband Modem .........................................C-1
Cabling and Computer Hardware ............................................................................ C-1