Emil uses nmap to scan two hosts using this command:
nmap -sS -T4 -O 192.168.99.1 192.168.99.7
He receives this output:

What is his conclusion?

Which of the following is a vulnerability in GNU's bash shell (discovered in September of 2014) that gives attackers access to run remote commands on a vulnerable system?

Eve is spending her day scanning the library computers. She notices that Alice is using a computer whose port
445 is active and listening. Eve uses the ENUM tool to enumerate Alice machine. From the command prompt, she types the following command.

What is Eve trying to do?

You have compromised a server on a network and successfully opened a shell. You aimed to identify all operating systems running on the network. However, as you attempt to fingerprint all machines in the network using the nmap syntax below, it is not going through.

What seems to be wrong?

An ethical hacker for a large security research firm performs penetration tests, vulnerability tests, and risk assessments. A friend recently started a company and asks the hacker to perform a penetration test and vulnerability assessment of the new company as a favor.
What should the hacker's next step be before starting work on this job?