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It allows the user to see traffic load on a network over time in graphical form. It was originally developed by Tobias Oetiker and Dave Rand to monitor router traffic, but has developed into a tool that can create graphs and statistics for almost anything. MRTG is written in Perl and can run on Windows, Linux, Unix, Mac OS and NetWare.
Pi-hole is a Linux network-level advertisement and Internet tracker blocking application [3] [4] which acts as a DNS sinkhole [5] and optionally a DHCP server, intended for use on a private network. [1] It is designed for low-power embedded devices with network capability, such as the Raspberry Pi, [3] [6] but can be installed on almost any ...
Network performance could be measured using either active or passive techniques. Active techniques (e.g. Iperf) are more intrusive but are arguably more accurate. Passive techniques have less network overhead and hence can run in the background to be used to trigger network management actions.
A common usage is to monitor network traffic by polling a network switch or router interface via Simple Network Management Protocol (SNMP). The Cacti end user front end supports both User and User Groups security models and supports Role Based Access Control (RBAC) for access to not only monitoring data, but various areas of the user interface.
Assuming your data cannot be compressed, the 8.192 seconds to transmit a 64 kilobyte file over a 64 kilobit/s communications link is a theoretical minimum time which will not be achieved in practice. This is due to the effect of overheads which are used to format the data in an agreed manner so that both ends of a connection have a consistent ...
Passive monitoring is a technique used to capture traffic from a network by copying traffic, often from a span port or mirror port or via a network tap. It can be used in application performance management for performance trending and predictive analysis. [ 1 ]
However, unlike a standard network card, an NMIC is designed to passively (and silently) listen on a network. At a functional level, an NMIC may differ from a NIC, in that the NMIC may not have a MAC address, may lack the ability to transmit and may not announce its presence on a network. Advanced NMICs have features that include an ability to ...
TCP needs configuration of network firewall and local firewall on the computers where agents are installed to allow traffic on default port 8084. Some other ports can also be chosen for this. ICMP does not need to configure a firewall but it needs more agents to provide information about all the paths between two subnets.