Access Control Lists | Cisco CCNA 200-301

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Access control lists, also known as ACLs or access lists, are rule-based lists that are used by switches and routers to identify traffic. They can identify traffic based on source address, destination address and port numbers.

The most common use for an access list is to deny or permit traffic, but there are other uses for Access Lists such as configuring Network Address Translation (NAT) and Quality of Service (QoS).

Standard Access List

Standard access lists only use the source address to identify traffic.
A standard access list uses numbers between 1 – 99.
Cisco decided to expand this to also include 1300 – 1999

Extended Access List

Extended access lists allow us to identify traffic based on the destination address, protocol and port number.
Extended access lists use numbers 100 – 199 and expanded numbers 2000 – 2699.

Named Access List

A name access list allows standard or extended access list to be given names rather than numbers. If you have multiple access lists on a device, named lists makes it easier to identify what each list does making them easier to manage.

#ccna #cisco #networking

[Da_Black_Man]

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I've been watching cisco videos for a couple of years first for my CCENT, now my CCNA, and yours are my absolute favorite. I've learned and forgotten exactly how and what some of these topics are that I don't use daily, and your videos really, really help.

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Damn, I've already watched 10+ video's today helping me explain the slides of cisco, have an exam soon so thanks a lot for speeding the study up by explaining things so clearly! Keep up the awesome work!

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[FonsieClaw]

Very clear explanation once again, thank you so much for these videos, you are an enormous help.

[oriostx]

Great video! This was so helpful, thank you for breaking it down.

[benjaminblankson]

Excellent teaching. An extremely clear explanation. Thanks

[robbiwafik]

Thanks for the video, really clear and concise explanatory.

[lucko_]

Cara, que explicação sensacional! Muito bom

[kumarraunak]

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[gd]

I love how u broke it down dumb style for my brain. Thumbs Do a packet capture vid like this using EPC

[mehdiroudeau]

i love u guys u are helping me much <3

[piyush]

I have now a fair understanding of ACLS. All I need now is to regularly practice it.

[ichrakstudent]

The most helpful and straight to the point video ever. Subscribed. Love your vids guys.

[zikobht]

Amazing video!! The only thing omho you should've talked about is how to apply the ACL on an interface (in/out). Thanks for sharing these amazing videos

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[ardentdfender]

Understanding use of Wildcards often usually screws my brain into short circuit thinking. But it’s made a bit easier in thinking 🤔 when you say it’s totally inverse of regular subnet mark or in how it’s written in meaning. Much understandable. ACLs can be damn confusing really in my opinion and takes a lot of work to understand them, their use and where exactly they are used.

[m-electronics]

First: very good video, I must use ACLs yesterday but not for the "default" use case. I must use ACL to specify which prefixes will get an LDP Label! There I've must think a lot because of is the prefix now source or destination.😅
I still don't understand it in this usecase but when you think it don't name SRC and DST rather Input and Output of a function then it makes sense it must be source. But thanks for your video also when I understand this direct because it is like FW Rules...

[chrispainter]

Thanks for the video, your effort is appreciated!

Clear and concise, great delivery too.

I wanted to find out more but came up to some roadblocks:

The register your interest link is broken, brings up a 404.
The amazon link just links to amazon, not a specific product.
The exam link also brings up a 404.

Hope this helps you and everyone who comes across this great video