1. Payload:-
It's a software program which is used to control target device/system.(a) Meterpreter:- Full access
(b)VNC(Virtual Network Compunding):- Live Moniter Screen
(c)Shell:- CMD (Command Promt) Zero
2. Zero Day Vulnerability:- Day vulnerability is the vulnerability that has been this closed both is not yet patched.
3. Zero day exploit:- An exploit attack zero day vulnerability are called zero day exploit.
4. patching:- Vulnerability fixing bug.
5. Daisy Chaining:- it's use like a proxy
6. Firewall:- It is a network security system that can monitor incoming or outgunning traffic. It is a software hardware based.
7. Bug Hunter:- 1.VRP(Vulnerability Report program)
2 MSRC(Microsoft Security Research Center)
8. Sniffing:- You can only read/see screen
9. Spoofing:- You can change anything what do you want it's uses for read and write.
10. Social Engineering:- You can Receive/collect inform from someone with the help of manipulate. 
11. Virus:- It's malicious code that can replace it safety until the target system destroy.
12. Key Stroke:- Logging/You know all about everything the uses person.
13. Phishing:- You can make duplicate page of any application and also known as attract target. 
