Question: what are all tcp flags?
Answer: 1st Flag - Urgent Pointer. The first flag is the Urgent Pointer flag, as shown in the previous screen shot. ... 
2nd Flag - ACKnowledgement. The ACKnowledgement flag is used to acknowledge the successful receipt of packets. ... 
3rd Flag - PUSH. ... 
4th Flag - Reset (RST) Flag. ... 
5th Flag - SYNchronisation Flag. ... 
6th Flag - FIN Flag. ... 
Summary.