Eavesdropping: In Person or On the Network?

About this interactive

Eavesdropping is listening in on something not meant for you, and the lesson places it in two settings. In person means you are on site and your ears pick up spoken words: overhearing staff in a lobby, catching a phone call in earshot, sitting beside staff in the canteen. On the network means equipment picks up the traffic crossing a wire or the air: a sniffer on a tap, capturing frames off the office Wi-Fi, reading cleartext credentials as they pass. The common thread is that both are passive — you only listen, you do not alter the message (altering it would be an on-path, man-in-the-middle attack, a different thing). So the only question is the medium: a conversation overheard, or traffic captured.

What you'll learn

Tell eavesdropping done in person, by overhearing people, from eavesdropping done on a network, by capturing traffic with a sniffer
Recognize that eavesdropping is passive interception, whichever medium it happens in

Aligned to

CompTIA Security+

2.2 Explain common threat vectors and attack surfaces.

CompTIA PenTest+

2.1 Given a scenario, apply information gathering techniques.

Key terms

Eavesdropping: The unauthorized interception of network traffic or keystrokes to capture credentials as they are transmitted or entered.
Packet Sniffing: The practice of capturing and analyzing network packets as they travel across a network, used by attackers to intercept unencrypted data.
Packet: A unit of data formatted for transmission over a network, containing a header, payload, and sometimes a trailer.
Man-in-the-Middle Attack: An attack where an adversary secretly intercepts and potentially alters communications between two parties.

Topics

Interactive Streak Sort

About TechKnowSurge

TechKnowSurge builds IT and cybersecurity professionals through hands-on, concept-first training built around real understanding — not memorization. Free interactive tools, structured programs, and 25+ years of real-world experience, all in one place.

Explore free tools and programs →