Answer:A) Packer sniffer
Step-by-step explanation: Wireshark is analyzer of packet which are open sourced.It helps in providing the services like troubleshooting, development analysis etc with the help of sniffing activity.The sniffing of the packet that a user owns is the technique for analyzing.
Other options are incorrect because port scanner provides data regarding the technique for network connection,vulnerability scanner scan the vulnerability of the network and content filter is used for filtering the excess web pages.Thus, the correct option is option(A).