$ sudo tcpdump -nSt host example.com

$ sudo tcpdump -ne host 203.0.113.50 and tcp port ! 22

$ sudo tcpdump -n host 203.0.113.53 and udp port 53

$ sudo tcpdump -n icmp and host 203.0.113.1 -v

$ sudo tcpdump -w 0001.pcap -i eth0

$ sudo tcpdump -r 0001.pcap

$ sudo tcpdump -w 0002.pcap -i eth0 -n port 53

$ sudo tcpdump -r 0002.pcap

• Flags [S] - flag SYN inicia conexão.