4.3.3. Point Coverage

Point coverage aims to find a target within range using nearby nodes. It is also known as target coverage. It is characterized by consuming less energy in a given zone than in the entire region of the FoI. Only a few targets are covered by individual nodes, while other targets can be detected under other sensor scopes. The primary goal is to select a specific target within the FoI to reduce energy consumption [71].

### *4.4. RQ4: Classification of Network Intruders*

There are two main types of intruders: internal and external. Internal intruders are people inside the organization; they can be either a customer or a legitimate user, such as an employee of the organization's network. External intruders are people outside the organization, whether external or internal. Each intruder can be involved in numerous illegal activities, working alone, as a group, or with agencies. These entities are described in detail below.
