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Patent

Network tap for use with multiple attached devices

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TLDR
In this article, the authors proposed a network tap for enabling attached devices such as an intrusion detection system to transmit information into a communication line of the network without disrupting the network traffic on the communication line.
Abstract
A network tap for enabling attached devices, such as an intrusion detection system, to transmit information into a communication line of the network without disrupting the network traffic on the communication line. When the attached device is an intrusion detection device, the network tap is connected to a firewall. An Ethernet switch or field programmable gate array (FPGA) is incorporated in the network tap to coordinate the transmission of device data to avoid data collisions with data transmissions already existing in the communication line. The network tap may be operated in various modes to accommodate different capabilities of attached devices. In addition, the network tap has various port configurations to allow a user to connect various attached devices through a single cable or dual cables and to connect various combinations of attached devices.

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Citations
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TL;DR: In this article, an end-to-end mapping, which maps the parameters of at least some of the input packets directly to the corresponding end to end actions, is cached in the network element.
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References
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Computer network switching system

TL;DR: In this article, a network switching system consisting of a first port coupled to a source, a second port coupled with a destination, and multiplexer means coupled to the first port and the second port for transferring data is described.
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Full-duplex medium tap apparatus and system

TL;DR: In this paper, a bi-directional network medium monitor including a tap apparatus connected inserted in a network media, including a transceiver and a clock recovery element for each medium and medium monitor connection, is presented.
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Method and apparatus to establish a tap-point in a switched network using self-configuring switches having distributed configuration capabilities

TL;DR: In this article, a method and apparatus for monitoring data sent between a source node and destination node in a switched network is presented, wherein the switches configure themselves to establish a connection path to a probe switch to receive the monitored data.