DSL-302T ADSL Modem User’s Guide

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IP Concepts

This appendix describes some basic IP concepts, the TCP/IP addressing scheme and show how to assign IP Addresses.

When setting up the Modem, you must make sure it has a valid IP address. Even if you will not use the WAN port (ADSL port), you should, at the very least, make sure the Ethernet LAN port is assigned a valid IP address. This is required for telnet, in-band SNMP management, and related functions such as “trap” handling and TFTP firmware download.

IP Addresses

The Internet Protocol (IP) was designed for routing data between network sites all over the world, and was later adapted for routing data between networks within any site (often referred to as “subnetworks” or “subnets”). IP includes a system by which a unique number can be assigned to each of the millions of networks and each of the computers on those networks. Such a number is called an IP address.

To make IP addresses easy to understand, the originators of IP adopted a system of representation called “dotted decimal” or “dotted quad” notation. Below are examples of IP addresses written in this format:

201.202.203.204 189.21.241.56 125.87.0.1

Each of the four values in an IP address is the ordinary decimal (base 10) representation of a value that a computer can handle using eight “bits” (binary digits — 1s and 0s). The dots are simply convenient visual separators.

Zeros are often used as placeholders in dotted decimal notation; 189.21.241.56 can therefore also appear as 189.021.241.056.

IP networks are divided into three classes on the basis of size. A full IP address contains a network portion and a

“host” (device) portion. The network and host portions of the address are different lengths for different classes of networks, as shown in the table below.

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D-Link DSL-302T user manual IP Concepts, IP Addresses
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DSL-302T specifications

The D-Link DSL-302T is a highly regarded ADSL modem that has become a popular choice for both home and small office users. Known for its reliability and ease of use, this modem is designed to provide high-speed internet access over traditional telephone lines, making it an ideal solution for users who need robust connectivity without the complications of more advanced networking setups.

One of the key features of the DSL-302T is its support for ADSL2 and ADSL2+ technologies. These advancements enable the modem to deliver faster speeds and improved performance over longer distances compared to traditional ADSL. With data rates of up to 24 Mbps downstream and 1 Mbps upstream, users can enjoy seamless streaming, online gaming, and smooth browsing experiences.

The DSL-302T is equipped with an Ethernet port, allowing users to connect directly to a computer or to a router for sharing the internet connection with multiple devices. This flexibility makes it suitable for both individual users and those who want to set up a more extensive home network.

In terms of installation, the D-Link DSL-302T is designed for user-friendliness. It comes with a straightforward setup wizard that guides users through the configuration process. This ease of installation means that even those with limited technical expertise can have the modem up and running in no time.

Security is another crucial aspect of the DSL-302T. It incorporates features such as NAT (Network Address Translation) and a built-in firewall to protect users' networks from external threats. It also supports PPPoE, which is essential for connecting to many ISPs.

The modem’s design is compact and lightweight, allowing for easy placement in any environment. It also operates quietly, which is an advantage for home users who prefer a serene atmosphere.

Overall, the D-Link DSL-302T combines speed, reliability, and security, making it a solid choice for anyone seeking a dependable ADSL modem. Its support for modern ADSL technologies, ease of installation, and robust security features make it suitable for a variety of internet usage scenarios. With D-Link's reputation for quality and customer support, the DSL-302T remains a relevant option for users looking to enhance their internet experience.
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