Netmask

Reference Manual for the Model RP614 Web Safe Router

•Class D

Class D addresses are used for multicasts (messages sent to many hosts). Class D addresses are in this range:

224.0.0.0 to 239.255.255.255.

•Class E

Class E addresses are for experimental use.

This addressing structure allows IP addresses to uniquely identify each physical network and each node on each physical network.

For each unique value of the network portion of the address, the base address of the range (host address of all zeros) is known as the network address and is not usually assigned to a host. Also, the top address of the range (host address of all ones) is not assigned, but is used as the broadcast address for simultaneously sending a packet to all hosts with the same network address.

In each of the address classes previously described, the size of the two parts (network address and host address) is implied by the class. This partitioning scheme can also be expressed by a netmask associated with the IP address. A netmask is a 32-bit quantity that, when logically combined (using an AND operator) with an IP address, yields the network address. For instance, the netmasks for Class A, B, and C addresses are 255.0.0.0, 255.255.0.0, and 255.255.255.0, respectively.

For example, the address 192.168.170.237 is a Class C IP address whose network portion is the upper 24 bits. When combined (using an AND operator) with the Class C netmask, as shown here, only the network portion of the address remains:

11000000 10101000 10101010 11101101 (192.168.170.237)

combined with:

11111111 11111111 11111111 00000000 (255.255.255.0)

Equals:

11000000 10101000 10101010 00000000 (192.168.170.0)

As a shorter alternative to dotted-decimal notation, the netmask may also be expressed in terms of the number of ones from the left. This number is appended to the IP address, following a backward slash ( / ), as “/n.” In the example, the address could be written as 192.168.170.237/24, indicating that the netmask is 24 ones followed by 8 zeros.

B-4	Network and Routing Basics

RP614 specifications

The NETGEAR RP614 is a widely recognized broadband router that provides an efficient solution for home networking needs. As a popular choice among users seeking both performance and reliability, this router boasts a variety of features aimed at enhancing connectivity and security.

One of the most notable features of the NETGEAR RP614 is its ability to support multiple connections. With four Ethernet LAN ports, it allows home users to connect several devices simultaneously, such as computers, printers, and gaming consoles, without causing bottlenecks. This is particularly useful in households where multiple users may be streaming, downloading, or gaming at the same time, ensuring a stable and uninterrupted internet experience.

The RP614 utilizes advanced networking technologies, including NAT (Network Address Translation) and firewall capabilities. NAT enables the router to assign private IP addresses to connected devices, effectively allowing them to share a single public IP address. This not only conserves IP addresses but also provides a layer of security by hiding the internal network structure from external threats. The built-in firewall offers added protection against unauthorized access, making it suitable for users concerned about internet security.

In terms of compatibility, the RP614 supports various internet connection types, including DSL and cable. This versatility ensures that it can be seamlessly integrated into most home networking setups, regardless of the internet service provider. The router is also equipped with a user-friendly web-based interface for setup and configuration, allowing users to easily manage network settings, security options, and parental controls.

One of the key characteristics of the NETGEAR RP614 is its reliability and performance. It is designed to deliver consistent speed and efficiency, making it suitable for both casual browsing and more intensive applications such as online gaming and video streaming. Its compact design allows for easy placement in any part of the home.

Overall, the NETGEAR RP614 stands out as a robust router that caters to the needs of everyday users. With its multiple connectivity options, security features, and user-friendly setup, it provides an effective solution for reliable home networking. Whether used for work, play, or streaming, the RP614 helps to ensure that all connected devices operate smoothly and safely.