Linksys RT042 manual Networking Basics, An Introduction to LANs, Use of IP Addresses

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Broadband Router

Chapter 2: Networking Basics

An Introduction to LANs

A Router is a network device that connects two networks together.

The Router connects your local area network (LAN), or the group of PCs in your home or office, to the Internet. The Router processes and regulates the data that travels between these two networks.

The Router’s Network Address Translation (NAT) technology protects your network of PCs so users on the Internet cannot “see” your PCs. This is how your LAN remains private. The Router protects your network by inspecting the first packet coming in through the Internet port before delivery to the final destination on one of the Ethernet ports. The Router inspects Internet port services like the web server, ftp server, or other Internet applications, and, if allowed, it will forward the packet to the appropriate PC on the LAN side.

The Use of IP Addresses

IP stands for Internet Protocol. Every device in an IP-based network, including PCs, print servers, and routers, requires an IP address to identify its location, or address, on the network. This applies to both the Internet and LAN connections.

There are two ways of assigning IP addresses to your network devices.

A static IP address is a fixed IP address that you assign manually to a PC or other device on the network. Since a static IP address remains valid until you disable it, static IP addressing ensures that the device assigned it will always have that same IP address until you change it. Static IP addresses are commonly used with network devices such as server PCs or print servers.

If you use the Router to share your cable or DSL Internet connection, contact your ISP to find out if they have assigned a static IP address to your account. If so, you will need that static IP address when configuring the Router. You can get the information from your ISP.

A dynamic IP address is automatically assigned to a device on the network. These IP addresses are called dynamic because they are only temporarily assigned to the PC or other device. After a certain time period, they expire and may change. If a PC logs onto the network (or the Internet) and its dynamic IP address has expired, the DHCP server will assign it a new dynamic IP address.

Chapter 2: Networking Basics

LAN: the computers and networking products that make up your local network

NAT (Network Address Translation): NAT technology translates IP addresses of a local area network to a different IP address for the Internet.

FTP (File Transfer Protocol): a protocol used to transfer files over a TCP/IP network.

Packet: a unit of data sent over a network.

server: any computer whose function in a network is to provide user access to files, printing, communications, and other services.

Static IP address: a fixed address assigned to a computer or device that is connected to a network.

Dynamic IP address: a temporary IP address assigned by a DHCP server.

DSL (Digital Subscriber Line): an always-on broadband connection over traditional phone lines.

ISP (Internet Service Provider): a company that provides access to the Internet.

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An Introduction to LANs

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Contents Broadband Router Copyright and Trademarks How to Use this GuideWord definition Table of Contents Common Problems and Solutions Frequently Asked Questions Appendix a TroubleshootingAppendix D Using the RT042 Utility Appendix B Upgrading FirmwareList of Figures Add/Edit New Applications22 Service Management Introduction WelcomeWhat’s in this Guide? Firmware the programming code that runs a networking deviceIntroduction What’s in this Guide? Use of IP Addresses Networking BasicsAn Introduction to LANs Packet a unit of data sent over a networkUse of IP Addresses Getting to Know the Broadband Router LEDsBack and Side Panels Reset ButtonPorts Connecting the Broadband Router OverviewConnection Instructions Connect a PCSetting Up and Configuring the Broadband Router System Summary TabAdvanced Setup Tab Domain a specific name for a network of computersSystem Information How to Access the Web-based UtilityUser Usage User Bandwidth ISP BandwidthLAN Setting Internet Connection TypeBasic Setup Tab Password Pptp Point-to-Point Tunneling ProtocolBasic Setup Tab MAC Clone Basic Setup Tab TimeTime Parental Control Tab On-Line Scheduler Parental Control Tab Website Hit RateParental Control Tab Performance Optimization Parental Control Tab Application UsageAdding/Editing New Applications Parental Control Tab Block List 19 Parental Control Tab Block ListAdvanced Setup Tab Forwarding Advanced Setup Tab DMZ HostPort Range Forwarding Advanced Setup Tab UPnP Port TriggeringAdvanced Setup Tab Advanced Routing Advanced Setup Tab DdnsDynamic Routing Static Routing Enter the following data to create a static route entryAdvanced Setup Tab VPN Pass Through Advanced Setup Tab Remote ManagementAdvanced Setup Tab System Management DiagnosticsImport Configuration File Factory DefaultFirmware Upgrade Export Configuration FileSyslog Log Tab System LogMail Log Setting Log Tab System StatisticsFor Windows 98 and Millennium Appendix a TroubleshootingCommon Problems and Solutions Need to set a static IP address on a PCFor Windows For Windows XPFor Windows 98 and Millennium Broadband Router Am not able to access the Router’s Web-based Utility Setup Application Start and End Protocol IP Address Enable Need to set up a server behind my RouterApplication Start and End Protocol IP Address Enabled Can’t get the Internet game, server, or application to work Click the DMZ Host tabFor Microsoft Internet Explorer 5.0 or higher To start over, I need to set the Router to factory defaultNeed to upgrade the firmware For Netscape 4.7 or higherMy DSL service’s PPPoE is always disconnecting Need to use port triggeringIs IPSec Passthrough supported by the Router? Frequently Asked QuestionsWhere is the Router installed on the network? Does the Router support IPX or AppleTalk?How can I block corrupted FTP downloads? Is the Router cross-platform compatible? What is DMZ Hosting?Will the Router function in a Macintosh environment? How many ports can be simultaneously forwarded?How can I check whether I have static or Dhcp IP addresses? How do I get mIRC to work with the Router?Figure B-1 Advanced Setup Tab System Management Appendix B Upgrading FirmwareWindows 98 or Me Instructions Windows 2000 or XP InstructionsFor the Router’s Web-based Utility Figure C-3 MAC Address/Physical AddressAppendix D Using the RT042 Utility Starting the UtilityUsage Configuration Screens Router InformationFigure D-3 The On-Line Scheduler On-Line Scheduler Hit RateReal Time Usage Performance OptimizationAppendix E The Setup Wizard Figure E-1 Basic Setup Tab NetworkFigure E-4 Obtain an IP automatically Figure E-5 Static IP Shared Resources Appendix F Windows HelpNetwork Neighborhood/My Network Places Appendix G Glossary Broadband Router Broadband Router Broadband Router Appendix H Specifications FCCAppendix I Warranty Information Limited WarrantyAppendix J Regulatory Information FCC StatementAppendix K Contact Information

RT042 specifications

The Linksys RT042 is a dual-band wireless router designed to deliver robust performance and extensive coverage for home and small office networks. As a product from Linksys, a leader in networking solutions, the RT042 stands out with its advanced features and technologies that cater to users' varying connectivity needs.

One of the main highlights of the Linksys RT042 is its dual-band capability. Operating on both the 2.4GHz and 5GHz frequencies, this router provides flexibility and minimizes interference, allowing users to choose the most suitable band for their devices. The 5GHz band is particularly useful for bandwidth-intensive applications such as gaming and HD video streaming, while the 2.4GHz band offers greater range for everyday activities like browsing and email.

The RT042 supports the latest Wi-Fi standards, including 802.11ac, which enhances overall speed and efficiency. Users can experience lightning-fast wireless speeds, making it an ideal choice for households with multiple devices connected simultaneously. The router also employs Multiple Input Multiple Output (MIMO) technology, which uses multiple antennas to improve signal quality and data throughput, ensuring a stable connection even in crowded environments.

Another notable feature is its four Gigabit Ethernet ports, allowing for wired connections to devices such as gaming consoles and desktop computers. These ports provide faster and more reliable connections compared to standard Ethernet. Additionally, the RT042 includes a USB port, enabling users to connect external storage devices or printers for easy sharing across the network.

Security is a top priority for the Linksys RT042, which comes equipped with advanced WPA2 encryption. This ensures that user data is protected from unauthorized access. Furthermore, the router includes features such as a firewall and VPN support, providing an added layer of security for sensitive information.

The RT042 is also designed with user-friendliness in mind. It features an intuitive web interface for easy setup and management, making it accessible even for those with limited technical knowledge. The router can be easily configured through a mobile app, allowing users to monitor their network from anywhere.

In summary, the Linksys RT042 is a versatile and powerful dual-band wireless router that combines advanced technology, robust security features, and user-friendly design. Whether for streaming, gaming, or everyday browsing, this router is an excellent choice for users looking to enhance their internet experience.
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