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viii Contents
Restoring the Default Configuration and Password ........................................................7-9
Problems with Date and Time .........................................................................................7-9
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
Ethernet Cabling ...........................................................................................................B-11
Uplink Switches and Crossover Cables .................................................................B-11
Cable Quality ......................................................................................................... B-12
Internet Security and Firewalls .................................................................................... B-12
What is a Firewall? ................................................................................................ B-12
Stateful Packet Inspection ..................................................................................... B-13
Denial of Service Attack ........................................................................................ B-13
Wireless Networking .................................................................................................... B-13
Wireless Network Configuration ............................................................................ B-13
Ad Hoc Mode (Peer-to-Peer Workgroup) ....................................................... B-14
Infrastructure Mode ........................................................................................ B-14
Extended Service Set Identification (ESSID) ........................................................ B-14
Authentication and WEP Encryption ..................................................................... B-15
Wireless Channel Selection .................................................................................. B-15