The Internet Control Message Protocol is the housekeeping protocol of the internet. It performs a variety of important administrative functions. In this video, learn the basic functions of ICMP and how you can use ICMP to troubleshoot network issues with the ping and traceroute commands.
- [Instructor] The Internet control message protocol,…ICMP, is the housekeeping protocol of the Internet.…It performs a variety of important administrative functions.…The Ping command is one of the most basic…network troubleshooting commands available.…When a system sends a ping command over the network,…the receiving system responds with an acknowledgement.…It's the equivalent of one system asking another,…"Are you there," and the target…system responding, "Yes, I am."…Although instead of asking these questions in English,…the ping command uses the ICMP protocol.…
The are you there question is asked by…sending a packet known as an ICMP echo request.…The target system responds, "Yes, I am,"…by sending an ICMP echo reply.…Let's try this from the command…line using Terminal on a MacBook.…I'm going to try pinging the website…of the International Information Systems…Security Certification Consortium, or ISC squared,…the creators of the CISSP exam.…Their website is www.isc2.org, so I'm going to…go ahead and type in the command ping space…
To join one of Mike's free study groups for access to bonus tips and practice questions, visit certmike.com.
- TCP/IP networking
- Network security devices
- Switches and routers
- Content distribution networks
- Storage networks
- Securing networks
- Network attacks
- Wireless networking and security
Skill Level Intermediate
Q: This course was updated on 07/27/2018. What changed?
A: New videos were added that cover network relationships and security device placement.
Insights from a Cybersecurity Professionalwith Mike Chapple32m 15s Intermediate
Networks and communications1m 31s
1. TCP/IP Networking
2. Network Security Devices
3. Designing Secure Networks
4. Specialized Networking
5. Secure Network Management
6. Network Attacks
7. Wireless Networking
- Mark as unwatched
- Mark all as unwatched
Are you sure you want to mark all the videos in this course as unwatched?
This will not affect your course history, your reports, or your certificates of completion for this course.Cancel
Take notes with your new membership!
Type in the entry box, then click Enter to save your note.
1:30Press on any video thumbnail to jump immediately to the timecode shown.
Notes are saved with you account but can also be exported as plain text, MS Word, PDF, Google Doc, or Evernote.