Contents
ix
August 2004
Troubleshooting PPPoE or PPPoA
..........................................................................
8-6
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-1
Routing Information Protocol
...................................................................................
B-2
IP Addresses and the Internet
.................................................................................
B-2
Netmask
..................................................................................................................
B-4
Subnet Addressing
..................................................................................................
B-4
Private IP Addresses
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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-9
Internet Security and Firewalls
....................................................................................
B-10
What is a Firewall?
................................................................................................
B-10
Stateful Packet Inspection
.....................................................................................
B-10
Denial of Service Attack
.........................................................................................
B-11
Ethernet Cabling
...........................................................................................................
B-11
Category 5 Cable Quality
.......................................................................................
B-11
Inside Twisted Pair Cables
....................................................................................
B-12
Uplink Switches, Crossover Cables, and MDI/MDIX Switching
............................
B-13