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tcpdump prints the contents of network packets. It can read packets from a network interface card or from a previously created saved packet file. tcpdump can write packets to standard output or a file. It is also possible to use tcpdump for the specific purpose of intercepting and displaying the communications of another user or computer.
[1] [2] [3] It accepts as input files produced by packet-capture programs, including tcpdump, Wireshark, and snoop. tcptrace can produce several different types of output containing information on each connection seen, such as elapsed time, bytes and segments sent and received, retransmissions, round trip times, window advertisements, and ...
libpcap was originally developed by the tcpdump developers in the Network Research Group at Lawrence Berkeley Laboratory. The low-level packet capture, capture file reading, and capture file writing code of tcpdump was extracted and made into a library, with which tcpdump was linked. [8]
ngrep (network grep) is a network packet analyzer written by Jordan Ritter.It has a command-line interface, and relies upon the pcap library and the GNU regex library.. ngrep supports Berkeley Packet Filter logic to select network sources or destinations or protocols, and also allows matching patterns or regular expressions in the data payload of packets using GNU grep syntax, showing packet ...
tcpdump: The Tcpdump team April 7, 2023 / 4.99.4 [13] CLI: BSD License: Free Wireshark (formerly Ethereal) The Wireshark team November 22, 2021 / 4.0.6 [14] Both GNU General Public License: Free Xplico: The Xplico team May 2, 2019 / 1.2.2 [15] Both GNU General Public License: Free
output that is tailored to line-oriented processing tools such as grep, sed, or awk. Normal the output as seen while running Nmap from the command line, but saved to a file. Script kiddie meant to be an amusing way to format the interactive output replacing letters with their visually alike number
There are two software suites that are able to communicate with RRCP-capable switches. First is Realtek's own WinSmart utility and Vendor-derived variants from it. Second is the OpenRRCP open-source project. Additionally, tcpdump has an interpreter for RRCP packets.
TCP window scale option is needed for efficient transfer of data when the bandwidth-delay product (BDP) is greater than 64 KB [1].For instance, if a T1 transmission line of 1.5 Mbit/s was used over a satellite link with a 513 millisecond round-trip time (RTT), the bandwidth-delay product is ,, =, bits or about 96,187 bytes.