IP Addressing

Applications

Devices on an IP network are located by their IP addresses, which is a 32 bit number divided into four 8 bit fields. The IP address identifies both the network and the host device (also known as a node) on that network. The address is usually written as the four decimal values for the fields (between 0 and 255) separated by decimal points; for example 196.65.43.21.

The high order field defines the IP class of the address. There are three commonly used classes of standard IP addresses:

A:1 to 127

B:128 to 191

C:192 to 223

For Class A addresses, only the first 7 bits of the high order field represents the network address, so there can be 127 networks. The remaining three fields are the host portion of the address – there can be over 16 million (224) host devices on each class A network.

Class B uses the first two fields for network addresses and can address approximately 16,000 networks. The two low order fields allow approximately 65,000 host addresses (216) for each network.

Class C uses three high order fields to address over 2 million networks; the low order field is used to address up to 253 hosts (the addresses with all bits set to 1 and all 0 are reserved for network use; so addresses available from 8 bits = 255 minus the 2 reserved).

IP addresses within a private network may be assigned arbitrarily, however, if that network is to interconnect with the global Internet, it is necessary to obtain a registered IP address.

For example, a small company is connected to the Internet; they are assigned a single class C IP network address (199.169.100.0). This network address allows the company to define up to 253 host addresses within their network.

LR5200A-R2, LR5100A-T specifications

The Black Box LR5100A-T and LR5200A-R2 are advanced network media converters designed to facilitate seamless data transmission across various media types. These devices are particularly valuable for organizations seeking high-performance solutions for extending network communications beyond traditional limits.

The LR5100A-T is an Ethernet media converter that operates over twisted pair cabling, efficiently converting 10/100/1000 Mbps Ethernet signals into fiber optic signals. This capability allows businesses to harness the long-distance advantages of fiber optics while maintaining compatibility with existing Ethernet infrastructure. With a broad range of supported distances, users can effectively communicate over distances up to 100 kilometers, depending on the type of fiber optic cable used and the transmission rate.

In contrast, the LR5200A-R2 emphasizes compatibility with a wider range of fiber types and supports both multimode and single-mode fiber connections. It also provides auto-negotiation capabilities, which enable it to automatically detect and configure to the optimal speed of connected devices, streamlining setup and enhancing user experience.

One of the key features of both the LR5100A-T and LR5200A-R2 is their rugged design, making them suitable for deployment in harsh environments. They are engineered to withstand extreme temperatures and are resistant to vibration, ensuring reliability in challenging settings. Additionally, both models adhere to industry standards, ensuring interoperability with a diverse array of networking equipment.

Notably, these converters come equipped with LED indicators that allow for real-time monitoring of device status, simplifying network management and troubleshooting. This feature ensures that technicians are promptly alerted to any connectivity issues, significantly reducing downtime.

Powering options for both models include standard AC power supplies or Power over Ethernet (PoE), allowing for flexible deployment scenarios without the need for additional power outlets. This flexibility can be a crucial factor in environments where power availability may be limited.

With their blend of performance, durability, and advanced features, the Black Box LR5100A-T and LR5200A-R2 media converters represent a solid choice for organizations looking to future-proof their network infrastructure while ensuring high levels of connectivity and reliability. Whether extending existing networks or implementing new solutions, these devices provide the necessary tools for effective communication in today’s digital world.