Reference Manual for the Model DG834GT 108 Mbps Super Wireless ADSL Router

Subnet addressing allows us to split one IP network address into smaller multiple physical networks known as subnetworks. Some of the node numbers are used as a subnet number instead. A Class B address gives us 16 bits of node numbers translating to 64,000 nodes. Most organizations do not use 64,000 nodes, so there are free bits that can be reassigned. Subnet addressing makes use of those bits that are free, as shown below.

Class B

Network

Subnet

Node

Figure 8-2: Example of Subnetting a Class B Address

A Class B address can be effectively translated into multiple Class C addresses. For example, the IP address of 172.16.0.0 is assigned, but node addresses are limited to 255 maximum, allowing eight extra bits to use as a subnet address. The IP address of 172.16.97.235 would be interpreted as IP network address 172.16, subnet number 97, and node number 235. In addition to extending the number of addresses available, subnet addressing provides other benefits. Subnet addressing allows a network manager to construct an address scheme for the network by using different subnets for other geographical locations in the network or for other departments in the organization.

Although the preceding example uses the entire third octet for a subnet address, note that you are not restricted to octet boundaries in subnetting. To create more network numbers, you need only shift some bits from the host address to the network address. For instance, to partition a Class C network number (192.68.135.0) into two, you shift one bit from the host address to the network address. The new netmask (or subnet mask) is 255.255.255.128. The first subnet has network number 192.68.135.0 with hosts 192.68.135.1 to 129.68.135.126, and the second subnet has network number 192.68.135.128 with hosts 192.68.135.129 to 192.68.135.254.

Note: The number 192.68.135.127 is not assigned because it is the broadcast address of the first subnet. The number 192.68.135.128 is not assigned because it is the network address of the second subnet.

The following table lists the additional subnet mask bits in dotted-decimal notation. To use the table, write down the original class netmask and replace the 0 value octets with the dotted-decimal value of the additional subnet bits. For example, to partition your Class C network with subnet mask 255.255.255.0 into 16 subnets (4 bits), the new subnet mask becomes 255.255.255.240.

Network and Routing Basics

B-5

August 2004

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NETGEAR DG834GT manual Example of Subnetting a Class B Address
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DG834GT specifications

The NETGEAR DG834GT is a versatile wireless ADSL2+ modem router that is widely recognized for its reliable performance and impressive feature set. As an all-in-one solution, it caters to the needs of both home and small office users who require stable internet connectivity combined with advanced networking capabilities.

One of the standout features of the DG834GT is its impressive wireless performance, which supports wireless 802.11g technology. This allows for wireless speeds of up to 54 Mbps, making it suitable for common internet activities such as web browsing, email, and streaming media. For users seeking enhanced range and reliability, the modem incorporates NETGEAR's patented Smart Wizard technology, which simplifies the installation process and ensures optimal wireless coverage throughout the area.

The DG834GT also supports ADSL2+ internet connections, providing a robust bandwidth of up to 24 Mbps, depending on the service provider and distance from the exchange. This means users can take full advantage of high-speed internet services, allowing for smooth simultaneous activities like online gaming and video conferencing.

Security is another important aspect of the DG834GT, featuring a robust firewall and support for WPA/WPA2 encryption, ensuring that user data remains secure. The modem also includes parental controls, enabling users to restrict internet access at certain times or filter content, making it ideal for family use.

In addition to its wireless capabilities, the DG834GT comes with four Ethernet ports, offering the flexibility to connect multiple wired devices. This makes it a great option for users who require stable connections for gaming consoles, desktop computers, or network printers.

Performance-wise, the NETGEAR DG834GT is equipped with Quality of Service (QoS) capabilities, allowing users to prioritize bandwidth for specific applications and devices. This ensures that essential tasks, such as video streaming or online gaming, receive the necessary bandwidth to function smoothly without interruption.

Overall, the NETGEAR DG834GT combines advanced technology, ease of use, and a comprehensive feature set, making it a popular choice among consumers looking for reliable ADSL connectivity and robust networking options. With its ability to support multiple devices and deliver high-speed internet, it remains a go-to solution for users navigating the demands of modern online life.
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