Which of the following steps can be taken as countermeasures against sniffer attacks?
Each correct answer represents a complete solution. Choose all that apply.

You send SYN packets with the exact TTL of the target system starting at port 1 and going up to port 1024 using hping2 utility. This attack is known as __________.

Against which of the following does SSH provide protection?
Each correct answer represents a complete solution. Choose two.

Which of the following can be used as a countermeasure against the SQL injection attack?
Each correct answer represents a complete solution. Choose two.

John works as a Network Administrator for Perfect Solutions Inc. The company has a Linux-based network. The company is aware of various types of security attacks and wants to impede them. Hence, management has assigned John a project to port scan the company's Web Server. For this, he uses the nmap port scanner and issues the following command to perform idle port scanning:
nmap -PN -p- -sI IP_Address_of_Company_Server
He analyzes that the server's TCP ports 21, 25, 80, and 111 are open.
Which of the following security policies is the company using during this entire process to mitigate the risk of hacking attacks?