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viii Contents
Obtaining a WAN IP Address ...................................................................................7-4
Troubleshooting PPPoE or PPPoA ..........................................................................7-5
Troubleshooting Internet Browsing ..........................................................................7-5
Troubleshooting a TCP/IP Network Using a Ping Utility .................................................7-6
Testing the LAN Path to Your Gateway ....................................................................7-6
Testing the Path from Your PC to a Remote Device ................................................7-7
Restoring the Default Configuration and Password ........................................................7-8
Using the Default Reset button ................................................................................7-8
Problems with Date and Time .........................................................................................7-8
Appendix A
Technical Specifications
General Specifications ................................................................................................... A-1
Appendix B
Networks and Routing Basics
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-9
Domain Name Server .............................................................................................. B-9
IP Configuration by DHCP .................................................................................... B-10
Ethernet Cabling ...........................................................................................................B-11
Uplink Switches, Crossover Cables, and MDI/MDIX Switching .............................B-11
Cable Quality ......................................................................................................... B-12
Glossary
Index