CCNA Quiz: Administrative Distance. Which route is selected and why? EIGRP, OSPF or RIP? CCNA | CCNP

Do you really understand Administrative Distance? Are you sure you know which route will be selected? Well, see if you an answer this quiz question! This is a practical demonstration using GNS3.
Cisco routers use Administrative to select the best path. But, it depends!
Administrative distance (AD) or route preference is a number of arbitrary unit assigned to dynamic routes, static routes and directly-connected routes. The value is used by vendor-specific routers to rank routes from most preferred (low administrative distance value) to least preferred (high administrative distance value). When multiple paths to the same destination are available in its routing table, the router uses the route with the lowest administrative distance. Router vendors typically design their routers to assign a default administrative distance to each kind of route that is used, however, this value can usually be adjusted manually by a network administrator.
#CCNA #AdminDistance #Routing

[@cuios]

thank you David for investing your time and producing high quality and very informative videos

[@amochswohntet99]

great lesson.
I would have guessed that the reason for router 4 being the chosen route is that it is the most specific route, and that is true, but an important caveat to that is the fact that the routes are made though different lans.

[@joeqfl]

I hope this helps someone....
Routing Table Order of Operations
1. Prefix Length - The longest matching or more specific route is preferred first, regardless of the dynamic routing protocols administrative distance.
2. Administrative Distance - If there are multiple routes to a destination with the same prefix length. The route with the lowest dynamic routing protocol administrative distance is preferred.
3. Metric - If there are multiple routes learned by the same dynamic routing protocol with the same prefix length. The route with the lowest metric is preferred.
3a. If two or more routes have equal metric values, then load balancing across routes may occur.
Summary:
1. Prefix Length
2. Administrative Distance
3. Metric
3a. Load Balancing

[@pretender440]

I really like how David explain well every topic he takes specially this one ,I've been looking for explanation on how this really work. Glad I saw this 👏👏

[@khalidwains1144]

Very nice explained. I consider my networking journey without you impossible. Your teaching style is awesome. Keep posting new things. Thanks sir!

[@dhilipkumar2567]

Thank you so much David 👍 Your quiz questions are awesome!!

[@BertieBrink1]

Great quality video sound and information thanks David! Enjoy the trip

[@jb121993]

Wonderful, in-depth, explanation!

[@kalyanparasuram6399]

It's a eye opener video in terms of AD values.

[@wilmacpossilboyz]

Beautiful island indeed 👍

[@raymation3d]

now that was a gold nugget. good info

[@ahmedabdulla3063]

Sir this is so clear explanation for a twisted idea, thanks.

[@davidleitman]

Thank you for clarifying this point for us David

[@jaybeer5164]

thank you very much!you save me time!

[@davidbombal]

You're welcome!

[@chrisyo4461]

Great video

[@saibot293]

Very interesting topic. I need to do more research on the longest match I honestly had not even thought of that

[@MrBiden-rf6mq]

you are the best bro

[@edyalcantarajr8513]

Great explanation, you definitely made things clear for me.

[@ghibli971]

more specific route overwrite less specific route
if there is route tiebetween routing protocols wins low administrative distance value

[@alenbilic]

great work david. would be good to see more ccnp related vids

[@Mehdikun1]

Brilliant explanation .. thank you david.

[@hulkmarvel9359]

Thanks man was very useful I didn't knew this longest march rule...

[@adamlicht6614]

Just brilliant. Thank you!

[@ifybruno1714]

I love this video David.. Thanks sooo much for this...

[@stackios]

Thank you David for this Quiz is very useful..

[@PraveenVas]

Informative

[@virajshah6452]

Great explanation Sir!

[@syedadil7442]

Really well explained

[@TheFotoVision]

I doubled the speed on this video, and the explanations still felt drawn out. Tech should be explained quick, and concise, with sufficient information. Nonetheless thank you for your knowledgeable contribution David.

[@itcenter5023]

nice place for training session. :)

[@yukhymgutman5963]

Thank you!

[@negushak]

thank you alot David !!!

[@davidbombal]

Thank you for watching.

[@maurycy5739]

Great Stuff David, but music was a little bit too loud imho. Thanks for your work it really helps!

[@davidbombal]

Sorry - will remove it / lower it next time.

[@Itsmemayann_]

Hi it may be a dumb question, I understand the 3 routes listed are different, but why did it choose the RIP route in the original topology? was it because of the subnet? and chose the longest prefix? ??

[@sibakerokulafu8367]

hi sir david great tutorial for route selection . im just curious how you summarized the ospf from /32 to /24.. did you use summary address for ospf on the ABR which is R3?

[@orleydoss3171]

Thanks 👍

[@abhishekshah11]

Interesting

[@chandrashekarg5907]

What if we have static route??

[@Girlwithapurse03]

So it was chosen by the longest route, and if there was a tie of the longest route then Administrative Distance would have been used as a tie breaker. got it

[@TheFotoVision]

Wish he could’ve just kept it as simple as your comment LOL

[@jewelbennett7325]

Soon will have laptop

[@waseemyamany4617]

Thx 🌹 😍😍😍😍😍
You are amazing 😍 😍 😍 😍 😍

[@davidbombal]

Thank you!

[@konradwerner4134]

😵‍💫

[@Everything-yes]

This video is blank only audio hear

[@davidbombal]

Plays for me and others. Maybe an Ad blocker or something? Try refreshing the page.

[@Everything-yes]

Now my age is 34 I have CCNS certified with 1 year job experience is it too late for me..

[@davidbombal]

Never too late. Watch this video about Stuart: th-cam.com/video/2AQksl3ltDI/w-d-xo.html

[@networkpoint4893]

Always learn , age is just numbers, and always think positive,

[@ghibli971]

I'm old 48 and i'm studying CCNA. Two years ago I started to work as network admin.
Want is power

[@GeorgeGVN]

New video from David Bombal???? Press the like button in the first 2 seconds of the video...

[@davidbombal]

Thank you George!

[@arammaldonado2451]

Dweeeeeeeeb lol jk Thanks!