Bran is an incident handler who is assessing the network of the organization. He wants to detect ping sweep attempts on the network using Wireshark. Which of the following Wireshark filters would Bran use to accomplish this task?
In the context of using Wireshark, a popular network protocol analyzer, to detect ping sweep attempts on a network, the filtericmp.type==8is used. ICMP (Internet Control Message Protocol) is utilized for sending error messages and operational information indicating, for example, that a requested service is not available or that a host or router could not be reached. ICMP type 8 messages are echo requests, which are used by the ping command to test the reachability of a host on an IP network. A ping sweep consists of ICMP echo requests sent to multiple hosts to find which ones are alive. By applying theicmp.type==8filter in Wireshark, Bran can isolate and examine the echo request messages, helping to identify ping sweep attempts, which are characterized by a high volume of ICMP echo requests over a broad range of IP addresses in a short period.
References:The ECIH v3 program by EC-Council covers network monitoring and analysis techniques, including the use of Wireshark and its filters to detect various types of network scanning activities, such as ping sweeps.
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