What is a first sector ("sector zero") of a hard disk?

Larry is an IT consultant who works for corporations and government agencies. Larry plans on shutting down the city's network using BGP devices and zombies?
What type of Penetration Testing is Larry planning to carry out?

A mid-sized enterprise recently suffered a security breach in their AWS-hosted application. The responsibility for identifying the source and cause of this breach falls under the purview of the internal security team. Based on the AWS shared responsibility model, which of the following would be the appropriate action for the team?

An Investigator Is checking a Cisco firewall log that reads as follows:
Aug 21 2019 09:16:44: %ASA-1-106021: Deny ICMP reverse path check from 10.0.0.44 to
10.0.0.33 on Interface outside
What does %ASA-1-106021 denote?

In a digital forensics investigation involving a data breach at a large corporation, the lead investigator is preparing to obtain a search warrant for seizing potential evidence. She needs to decide which type of warrant is appropriate given that the main suspect s activities seem to have involved significant online communication and data transfer. Which of the following actions should she take?