July 2026
Intermediate
729 pages
33h 9m
English
Content preview from Ethical Hacking
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4.4 ICMP, UDP, and TCP
Important protocols in connection with network scanning are the Internet Control Message Protocol (ICMP), User Datagram Protocol (UDP), and Transmission Control Protocol (TCP). Table 4.6 briefly describes them.
|
Protocol |
Layer Where It Operates |
Description |
|---|---|---|
|
Internet Control Message Protocol (ICMP) |
3 |
You’ll primarily use ICMP for diagnostics and troubleshooting in networks, and to exchange control and error messages between network devices. |
|
User Datagram Protocol (UDP) |
4 |
UDP is a connectionless protocol that enables fast but unsecured data transfers. You’ll primarily use it for applications that require fast transmission and can tolerate occasional data loss, such as video streaming or online ... |
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