Which of the following options define daisy chaining? Existence of a weakness that can lead to undesirable event compromising the system The act by which a hacker attacks a system, then backtracks to cover their tracks Collection of tools used for conducting vulnerability assessments and attacks (e.g. Kali Linux) A breach of an IT system through vulnerability Set of instructions written in a programming language (e.g. C, Pert, VB) and can be used to explot certain vulieratiities A computer threat that tries to exploit vulnerabilities that are unknown to others Novice 'hackers who use other people's exploits. They can use existing scripts but cannot create their own Whoih of the following port is used to receive emails from an Email server? a. 110 b. 119 c. 135 d. 139