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IT Security · Professional · Professional Certifications

CEH Footprinting, Scanning and Enumeration

Reconnaissance, nmap scan types, banner grabbing, enumeration of SMB, SNMP, LDAP and DNS, and vulnerability analysis.

About this set

40 basic cards for Professional IT Security. It opens with "What is passive footprinting?" and "What is active footprinting?". Study it alongside the other Professional sets below.

40 cards · basic cards · AI-written, checked twice. Edit anything.

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What is passive footprinting?
Show answerGathering publicly available information without directly contacting the target
What is active footprinting?
Show answerDirectly interacting with the target to gather information
What is banner grabbing?
Show answerRetrieving service version and OS info by connecting to open ports
Which nmap scan uses a complete TCP three-way handshake?
Show answerTCP Connect scan (-sT)
Which nmap scan leaves minimal logging on the target?
Show answerTCP SYN scan (-sS), also called half-open scan
What nmap parameter enables OS detection?
Show answer-O
What nmap parameter enables service version detection?
Show answer-sV
What are the four port states nmap can report?
Show answerOpen, closed, filtered, unfiltered
What is the difference between filtered and closed ports?
Show answerFiltered: firewall blocks probes. Closed: host responds the port is unused.
What is an ACK scan (-sA) used to determine?
Show answerMapping firewall rules and identifying filtered ports
What is a FIN scan (-sF)?
Show answerSends packets with FIN flag set; probes for open ports based on RFC compliance
What is an Xmas scan (-sX)?
Show answerSends packets with FIN, PSH and URG flags set; stealthier than SYN scan
What is a Null scan (-sN)?
Show answerSends TCP packets with no flags set to probe for open ports
What is an Idle scan (-sI)?
Show answerUses a zombie host to scan the target without revealing attacker's IP
What protocol and port does SNMP use?
Show answerUDP on port 161

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