Jack is conducting a port scan of a target network. He knows that his target network has a web server and that a mail server is up and running. Jack has been sweeping the network but has not been able to get any responses from the remote target. Check all of the following that could be a likely cause of the lack of response?

You are scanning the target network for the first time. You are able to detect few convention open ports. While attempting to perform conventional service identification by

connecting to the open ports, the scan yields either bad or no result. As you are unsure of the protocols in use, you want to discover as many different protocols as possible. Which of the following scan options can help you achieve this?

Paula works as the primary help desk contact for her company. Paula has just received a call from a user reporting that his computer just displayed a Blue Screen of Death screen and he ca no longer work. Paula walks over to the user’s computer and sees the Blue Screen of Death screen. The user’s computer is running Windows XP, but the Blue screen looks like a familiar one that Paula had seen a Windows 2000 Computers periodically.

The user said he stepped away from his computer for only 15 minutes and when he got back, the Blue Screen was there. Paula also noticed that the hard drive activity light was flashing meaning that the computer was processing some thing. Paula knew this should not be the case since the computer should be completely frozen during a Blue screen. She checks the network IDS live log entries and notices numerous nmap scan alerts.

What is Paula seeing happen on this computer?

Mark works as a contractor for the Department of Defense and is in charge of network security. He has spent the last month securing access to his network from all possible entry points. He has segmented his network into several subnets and has installed firewalls all over the network. He has placed very stringent rules on all the firewalls, blocking everything in and out except ports that must be used. He does need to have port 80 open since his company hosts a website that must be accessed from the Internet. Mark is fairly confident of his perimeter defense, but is still worried about programs like Hping2 that can get into a network through convert channels.

How should mark protect his network from an attacker using Hping2 to scan his internal network?

John has performed a scan of the web server with NMAP but did not gather enough information to accurately identify which operating system is running on the remote host. How could you use a web server to help in identifying the OS that is being used?

Nathalie would like to perform a reliable scan against a remote target. She is not concerned about being stealth at this point. Which of the following type of scans would be the most accurate and reliable?

Which FTP transfer mode is required for FTP bounce attack?

You want to scan the live machine on the LAN, what type of scan you should use?

Jenny a well known hacker scanning to remote host of 204.4.4.4 using nmap. She got the scanned output but she saw that 25 port states is filtered. What is the meaning of filtered port State?

Your are trying the scan a machine located at ABC company’s LAN named mail.abc.com. Actually that machine located behind the firewall. Which port is used by nmap to send the TCP synchronize frame to on mail.abc.com?