Great question! It's interesting, most describe it as TOS even though DSCP and ECN are new replacements. It seems the answer to your question may be that they are all optional in their use. The 8 bits was originally called type of service (TOS) and many RFCs reference it as TOS. TOS was optionally used and never got wide spread use. DSCP replaced TOS, and is backwards compatible with TOS. Both DSCP and ECN are optional as well, so unless you specifically set it up, you aren't using the 8 bits at all. Really you can think of the 8 bits as the TOS field. Optionally you can barrow those bits to implement either DSCP or ECN. FYI, I do have a series of videos about Quality of Service. Here are the videos if your interested: Module Intro th-cam.com/video/Vh2Vhvkz-EM/w-d-xo.html Network Quality th-cam.com/video/aiQyX8aqpWQ/w-d-xo.html QoS Strategies th-cam.com/video/kT1qG42kH50/w-d-xo.html QoS Tools th-cam.com/video/fs8XvaGoTEk/w-d-xo.html QoS Classification th-cam.com/video/g-xZecnKXts/w-d-xo.html QoS Marking th-cam.com/video/aXFzHibiq10/w-d-xo.html QoS Marking - DSCP th-cam.com/video/FIn8zYaENro/w-d-xo.html Congestion Avoidance th-cam.com/video/E8uC29nysI8/w-d-xo.html Queuing Algorithms th-cam.com/video/Q4Tj7xbh3AQ/w-d-xo.html Traffic Policing and Shaping th-cam.com/video/oeJyxIQVs1g/w-d-xo.html
Oh shoot, your right! That should be 2 to the power of 16, not 10. I'll have to figure out how to make that change. Thanks for bringing it to my attention.
![[Live สด] การออกรางวัลสลากกินแบ่งรัฐบาล งวดวันที่ 16 ธันวาคม 2567](http://i.ytimg.com/vi/dNTiBBthKgQ/mqdefault.jpg)
Thank you brother. That was very helpful.
Glad it helped! :)
Bravo, great video. Keep it up.
Thank you very much!
thank you. it is so clear!
Awesome, glad you liked it!!! 😃
thank you for your videos! they're really helpful
You're very welcome! It's all worth it when I get comments like these!
keep up the good work
Thanks! Glad you like them and I appreciate your support!
Thanks dude!!
You're welcome! Glad you liked!!!
why in some ipv4 header we have type of service instead of DSCP and ECN ?
Great question! It's interesting, most describe it as TOS even though DSCP and ECN are new replacements. It seems the answer to your question may be that they are all optional in their use.
The 8 bits was originally called type of service (TOS) and many RFCs reference it as TOS. TOS was optionally used and never got wide spread use. DSCP replaced TOS, and is backwards compatible with TOS. Both DSCP and ECN are optional as well, so unless you specifically set it up, you aren't using the 8 bits at all.
Really you can think of the 8 bits as the TOS field. Optionally you can barrow those bits to implement either DSCP or ECN.
FYI, I do have a series of videos about Quality of Service. Here are the videos if your interested:
Module Intro th-cam.com/video/Vh2Vhvkz-EM/w-d-xo.html
Network Quality th-cam.com/video/aiQyX8aqpWQ/w-d-xo.html
QoS Strategies th-cam.com/video/kT1qG42kH50/w-d-xo.html
QoS Tools th-cam.com/video/fs8XvaGoTEk/w-d-xo.html
QoS Classification th-cam.com/video/g-xZecnKXts/w-d-xo.html
QoS Marking th-cam.com/video/aXFzHibiq10/w-d-xo.html
QoS Marking - DSCP th-cam.com/video/FIn8zYaENro/w-d-xo.html
Congestion Avoidance th-cam.com/video/E8uC29nysI8/w-d-xo.html
Queuing Algorithms th-cam.com/video/Q4Tj7xbh3AQ/w-d-xo.html
Traffic Policing and Shaping th-cam.com/video/oeJyxIQVs1g/w-d-xo.html
2 power 16 = 65535 bits
Oh shoot, your right! That should be 2 to the power of 16, not 10. I'll have to figure out how to make that change. Thanks for bringing it to my attention.
thanks
Your welcome!
Thanks❤
You're welcome, glad you liked it!
8:18 How is 10 to the power of 16 is 65,536. Isn't it 10000000000000000 ??
Yes, you are correct. That should be 2 to the power of 16, not 10. Thanks for calling that out!
@@TechKnowSurge Yes My Apologies you have already clarified in another comment. I didn’t see.
@@saqibnagauri No problem at all. If in doubt, I'd rather you call it out. I record any issues, and at some point, I'll go and correct them.
2^16 instead of 10^16
Doh! Yeah, need to fix that.
why music?
Do I mention music? What’s the time marker on the video, I don’t have access to the transcripts right now.