Async terminal

is a VT100 or compatible video display terminal.

Autobaud

is the default line speed code (throughput class) for async PAD ports. When a PAD places a call through a port set to Autobaud, the port's internal clocks are set to match the speed of the PAD.

B

Bandwidth

is the difference between the lowest and highest frequencies of a transmission channel, usually expressed in hertz (Hz).

Banner

is the display area at the top of a screen that generally features product name, revision, etc.

BPDU

stands for “Bridge Protocol Data Unit,” also called a “Hello” message. Bridges peri- odically send BPDUs to update each other on their status.

bps

stands for “bits per second,” which is a rate of data transmission.

Bridge

is a device that links two local-area networks (LANs), receiving data from one LAN and forwarding it to the other.

Broadcast

is a method of delivering the same data to all hosts in a network.

Buffer

is a storage device or routine used to compensate for a difference in the rate of data flow or time of occurrence when transmitting data between devices.

C

Call

is a request for connection between two DTEs, each using a logical channels across the DTE/DCE interface.

Checksum

is an arithmetic sum used to verify the integrity of bits of data. A bad checksum means that the data is corrupted. An IP checksum is calculated only for the IP header, and is re-calculated each time the datagram is transmitted.

Cluster controller

is a device that controls input/output of a group of devices (terminals, printers, PCs, etc.) attached to it, and linking these devices to a mainframe.

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SmartSwitch 1800 4. 0 User Guide, Rev 01

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Cabletron Systems 1800 manual Bpdu
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1800 specifications

Cabletron Systems, a leading player in network management and telecommunications solutions during the late 20th century, introduced several innovative products that played a crucial role in shaping enterprise networking. Among these were the Cabletron FRX6000, FRX4000, and the FRX1800, which delivered advanced features aimed at enhancing network performance, security, and scalability.

The Cabletron FRX6000 was designed as a robust multi-layer switch, ideal for large-scale enterprise environments. It supported extensive routing capabilities, allowing organizations to manage traffic efficiently even under heavy loads. The FRX6000 boasted high throughput rates and low latency, making it suitable for demanding applications. With support for various network protocols, including IP, IPX, and AppleTalk, its adaptability made it a versatile choice for diverse networking needs. Moreover, security features like VLAN support and Access Control Lists (ACLs) provided enhanced protection against potential threats.

Moving to the FRX4000, this model offered a balance between performance and cost-effectiveness. The FRX4000 maintained many of the essential features of its larger counterpart while catering to medium-sized enterprises. It provided Layer 3 routing and could handle multiple simultaneous connections, ensuring seamless communication across departments. The modular design allowed for easy upgrades, enabling businesses to expand their network infrastructure without significant overhauls. This made the FRX4000 an attractive option for organizations looking to optimize their network investments.

Lastly, the FRX1800, designed for small to medium businesses, focused on simplicity and ease of use while still incorporating powerful network management capabilities. Its user-friendly interface made it accessible for organizations lacking extensive IT resources. The FRX1800 provided essential functionalities such as Integrated Layer 2 switching and routing, network monitoring, and basic security features, ensuring that even smaller companies could maintain efficient, reliable networking without overwhelming complexity.

All three models utilized advanced technologies, including a high bandwidth backbone and state-of-the-art switching architecture, to enable fast and reliable data transfer. They also supported Quality of Service (QoS) mechanisms, allowing businesses to prioritize critical applications and ensure consistent performance across the network.

In summary, the Cabletron FRX6000, FRX4000, and FRX1800 were pivotal in enhancing network capabilities, providing organizations with scalable, secure, and high-performance options tailored to their specific needs.
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