An online intrusion takes place when an unauthorized person gains access to a digital device by using an Internet connection and exploiting vulnerabilities in hardware or software.

1. A ________ Access Trojan is malware that arrives disguised as legitimate software and then sets up a ________ that provides unauthorized access to a victim's device.

2. Smartphones are the top target for malware that locks a device and then requests payment for an unlocking code.

3. Malware with control capability is programmed for off-site control of the camera or microphone on a victim's device.

4. Hackers who gain control over several computers can organize them into a client-server network known as a ________. This network is cloaked from the victims, who continue to use their devices as usual and are unaware of illicit activities that may be taking place behind the scenes.

5. A ________-day attack exploits previously unknown vulnerabilities in software applications, hardware, and operating system program code.

6. To defend against these attacks, consumers can use an on-______ scanner. Defense against intrusions is also offered by personal ________, which block unauthorized access. A network router can be deployed as a hardware-based firewall.