What is packet sniffer and how it works?

Related questions

1. What is WiFi sniffing?
2. What is the benefit of using Wireshark?
3. What is promiscuous mode in Wireshark?
4. Can Wireshark read encrypted data?
5. Can Wireshark decrypt SSL traffic?
6. What are the applications of Wireshark?
7. What is packet sniffing in networking?
8. What can Wireshark do?
9. Can Wireshark sniff wireless?
10. What is a WiFi packet?

Tags

1. #reassembled
2. #intended
3. #switched
4. #networks
5. #reach
6. #traffic
7. #destination
8. #several
9. #packets
10. #installed
11. #broken
12. #packet
13. #captures
14. #network
15. #these
16. #intercepts
17. #sniffer
18. #transmitted
19. #their