As you can see we have numerous ways to write out our SYN scan. Whether we want to target a single system or multiple with a specified source/destination ports or group or just any ports. SYN scan can be put into practical use for both the good and bad in the realm of cyber security. You could use this as a network security tool and scan for common open ports on the network, but this also means cyber criminals can as well:

>> sr1(IP(dst="72.14.207.99")/TCP(dport=80,flags="S"))
>> syn=sr(IP(dst="192.168.1.1")/TCP(sport=RandShort(),dport
[80],flags="S"))
>>> syn=sr(IP(dst="192.168.1.1")/TCP(sport=67,dport=[22,80,21,443], flags="S"))