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Reference Manual for the NETGEAR 54 Mbps Wireless Access Point WG602v3
C-10 Network, Routing, Firewall, and Cabling Basics
202-10060-02, February 2005
MAC Addresses and ARP
An IP address alone cannot be used to deliver data from one LAN device to another. To send data
between LAN devices, you must convert the IP address of the destination device to its media
access control address (MAC address). Each device on an Ethernet network has a unique MAC
address, which is a 48-bit number assigned to each device by the manufacturer. The technique that
associates the IP address with a MAC address is known as address resolution. Internet Protocol
uses the ARP to resolve MAC addresses.
If a device sends data to another station on the network and the destination MAC address is not yet
recorded, ARP is used. An ARP request is broadcast onto the network. All stations on the network
receive and read the request. The destination IP address for the chosen station is included as part of
the message so that only the station with this IP address responds to the ARP request. All other
stations discard the request.
The station with the correct IP address responds with its own MAC address directly to the sending
device. The receiving station provides the transmitting station with the required destination MAC
address. The IP address data and MAC address data for each station are held in an ARP table. The
next time data is sent, the address can be obtained from the address information in the table.
For more information about address assignment, refer to the IETF documents RFC 1597, Address
Allocation for Private Internets, and RFC 1466, Guidelines for Management of IP Address Space.
Internet Security and Firewalls
When your LAN connects to the Internet through a router, an opportunity is created for outsiders
to access or disrupt your network. A NAT router provides some protection because by the very
nature of the process, the network behind the router is shielded from access by outsiders on the
Internet. However, there are methods by which a determined hacker can possibly obtain
information about your network or at the least can disrupt your Internet access. A greater degree of
protection is provided by a firewall router.
- Reference Manual for the 1
- NETGEAR 54 Mbps Wireless 1
- Access Point WG602v3 1
- Technical Support 2
- Radio Frequency Notice 3
- Contents 5
- Chapter 1 9
- About This Manual 9
- How to Use This Manual 10
- How to Print this Manual 11
- 1-4 About This Manual 12
- Chapter 2 13
- Introduction 13
- Key Features 14
- Introduction 2-3 15
- System Requirements 16
- What’s In the Box? 16
- Hardware Description 17
- 2-6 Introduction 18
- Chapter 3 19
- Default Factory Settings 20
- Wireless Data 21
- Security Options 21
- Range: Up to 300 Foot Radius 21
- WG602 54 Mbps 22
- Wireless Access Point 22
- ETHERN ET 22
- 4VERIFY WIRELESS CONNECTIVITY 24
- Chapter 4 41
- Management 41
- 4-2 Management 42
- Management 4-3 43
- Management 4-5 45
- 2. Release the Reset button 45
- 4-6 Management 46
- Chapter 5 47
- Advanced Configuration 47
- 5-2 Advanced Configuration 48
- Advanced Configuration 5-3 49
- Wireless PC Card 50
- 5-6 Advanced Configuration 52
- 5-8 Advanced Configuration 54
- Chapter 6 55
- Troubleshooting 55
- 6-2 Troubleshooting 56
- Troubleshooting 6-3 57
- 6-4 Troubleshooting 58
- Appendix A 59
- Specifications 59
- A-2 Specifications 60
- Appendix B 61
- Wireless Networking Basics 61
- 802.11 Authentication 63
- Open System Authentication 63
- Shared Key Authentication 64
- Overview of WEP Parameters 65
- Key Size 66
- Wireless Channels 67
- How Does WPA Compare to WEP? 69
- Wired Network with Optional 72
- 802.1x Port Based Network 72
- Access Control 72
- Wireless LAN 72
- Is WPA/WPA2 Perfect? 76
- Product Support for WPA/WPA2 76
- Appendix C 79
- IP Addresses and the Internet 80
- Subnet Addressing 82
- Network Subnet Node 83
- Table C-2. Netmask Formats 84
- Private IP Addresses 85
- IP Configuration by DHCP 86
- Domain Name Server 87
- Routing Protocols 87
- Ethernet Cabling 89
- Category 5 Cable Quality 90
- Inside Twisted Pair Cables 91
- Appendix D 95
- 202-10060-02, February 2005 100
- 3. Type ipconfig /all 105
- 4. Type exit 105
- Glossary 107
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