Abstract: A method of detecting abnormal or malicious activity in a point-to-point or packet-switched data communication network includes tapping a link in the network to obtain a data stream transmitted from a node of the network in parallel with transmission of the data stream through the network. The tap is non-invasive because it does not interfere with the normal traversal of the data stream across the network. This is useful for certain applications, such as mission-critical systems, where it is desirable to monitor the network and inspect the data without adversely impacting or otherwise interfering with the normal operation of the system. The method further includes decoding a communication protocol encoded in the data stream to obtain payload data from the data stream, analyzing the payload data to detect abnormal or malicious activity, and notifying a host of the network of the detected abnormal or malicious activity in the payload data.

Abstract: A woodworking square having multiple uses. The square may be used to locate long and short points for trimming an opening and may be used to locate pitch line for rafters in a quick, efficient manner. The device also serves as a arc or circle drawing instrument. The device includes ledges so that it may slide against a straight edge and perform a cut or draw a line parallel to the straight edge.