Ethical Hacker Chapter 5

A ping sweep is used to scan a range of IP addresses to look for live systems. A ping sweep can also alert a security system, which could result in an alarm being triggered or an attempt being blocked. Which type of scan is being used?

Network scan

Alex, a security specialist, is using an Xmas tree scan. Which of the following TCP flags will be sent back if the port is closed?

RST

Information transmitted by the remote host can be captured to expose the application type, application version, and even operating system type and version. Which of the following is a technique hackers use to obtain information about the services running on a target system?

Banner grabbing

Which of the following packet crafting software programs can be used to modify flags and adjust other packet content?

Colasoft

You want a list of all open UDP and TCP ports on your computer. You also want to know which process opened the port, which user created the process, and what time is was created. Which of the following scanning tools should you use?

Currports

Randy is an ethical hacker student. He has learned how nmap flag manipulation can help find open ports. Although the name of the operating system did not jump right out at him, he might be able to figure it out by reviewing packet information. In a packet, Randy can see a TTL of 255 and a window size of 4128. What type of scanning process is Randy using?

Fingerprinting

Which of the following best describes the scan with ACK evasion method?

Helps determine whether the firewall is stateful or stateless and whether or not the ports are open.

A hacker finds a target machine but wants to avoid getting caught, so the hacker finds another system to take the blame. This system is frequently called a zombie machine because it's disposable and creates a good distraction. Which of the following port scans is being used?

Idle scan

Which of the following is a benefit of using a proxy when you find that your scanning attempts are being blocked?

It filters incoming and outgoing traffic, provides you with anonymity, and shields you from detection.

Which of the following is an online tool that is used to obtain server and web server information?

Netcraft

Which of the following scans is used to actively engage a target in an attempt to gather information about it?

Port scan

Joe wants to use a stealthy Linux tool that analyzes network traffic and returns information about operating systems. Which of the following banner grabbing tools is he most likely to use?

P0f

Which of the following flags is used by a TCP scan to direct the sending system to send buffered data?

PSH

TCP is a connection-oriented protocol that uses a three-way handshake to establish a connection to a system port. Computer 1 sends a SYN packet to Computer 2. Which packet does Computer 2 send back?

SYN/ACK

You are using an iOS device. You want to scan networks, websites, and ports to find open network devices. Which of the following network mapping tools should you use?

Scany

Which of the following best describes telnet?

The tool of choice for banner grabbing that operates on port 23.

What type of scan is used to find system weaknesses such as open ports, access points, and other potential threats?

Vulnerability scan

A technician is using a modem to dial a large block of phone numbers in an attempt to locate other systems connected to a modem. Which type of network scan is being used?

Wardialing

Nmap can be used for banner grabbing. Nmap connects to an open TCP port and returns anything sent in a five-second period. Which of the following is the proper nmap command?

nmap -sV --script=banner ip_address