Network Devices Explained | Hub, Bridge, Router, Switch

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Network Devices Explained | Hub, Bridge, Router, Switch

Рет қаралды 477,582

Күн бұрын

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This video will go over basic network devices. We will see how they work and what they are used for.
Hubs
Hubs were around before switches. A Hubs job is to forward traffic from the source device to the destination device.
A hub is a layer 1 (physical layer) device which means that is does not understand MAC or IP addresses. This is a problem. Because the hub does not know where the destination device is located, it will send traffic out of all ports (except the receiving port) causing collisions and queues which results in packet loss and delays.
Due to the horrific down falls, hubs have been replaced with switches almost everywhere.
Bridges
Bridges are used to separate a LAN network in to segments so that traffic is not sent between them. They work by using layer 2 (data link later) to identify the where traffic should be sent. Now it is worth noting that bridges will send traffic out all ports until it learns (using MAC address) where each port leads.
Switches
You could think of a switch as the heart of a network, pumping blood (traffic) around the body (network). All Devices will connect to the switch and it is the switches job to send the traffic to the correct place. Now unlike a hub, a switch can learn the mac addresses of each port using a Mac Address Table and can also send and receive at the same tine which means no more collisions or delays.
Routers
We have all heard of them and most likely everyone you know will have one in their home. If your reading this on a computer then I bet there is one right next to you.
A router connects your LAN to other networks such as the internet. If your house was a LAN network, your door would be the router. It is the way ‘outside’ of your network.
#ccna #cisco #networking

Пікірлер: 241

@chrisguy2366 3 жыл бұрын

Really easy to understand, clear and not at all boring, just watching them all again before i start trying a few labs. probably not all the info you need to pass ccna but it definitly gives you a clear basis and understanding to work on, BUT ITS FREEEEEEEE!!!!!! thanks guys keep at it!

@Certbros 3 жыл бұрын

Thanks Chris! I really appreciate the comment! Great to hear you liked the video.

@cjmurray7892 2 жыл бұрын

Hey man you think this series is a good series for network+ too?

@akramelfaressi 2 жыл бұрын

@@cjmurray7892 Yes, i watch this series and other series of network plus and actuallt there are small differences

@jadearrowsmith1620 4 жыл бұрын

This was incredibly clear, thank you!

@Certbros 4 жыл бұрын

You're welcome Jade. Glad you liked it 👍

@electricz3045 2 жыл бұрын

Such a kind guy. Explain everything clear i understood everything and wrote it on a paper to save it in my brain. Only watching videos won't really help on understanding.

@piyushukla22 4 жыл бұрын

Awesome video! Thank you for breaking down such complex concepts making them easier to understand. Thumbs up to you!!

@Certbros 4 жыл бұрын

Thanks Piyush!

@MrTosa43 Жыл бұрын

Harry kane teaching cisco

@radonsmith4386 4 жыл бұрын

Very helpful for my upcoming network exam. Thanks alot!

@Certbros 4 жыл бұрын

No problem. Good luck with your exam. You'll smash it!

@PieterExplainsTech 7 жыл бұрын

A small tip: did you notice how your background (a radial gradient) looks like a bunch of circles in different colors, even though that's not how you intended it to look? I've also had that problem and there's a way to fix that. The phenomenon is called "banding". If you open or recreate the background in a graphics program like Photoshop, Affinity Designer or the Gimp, you can add a bit noise to break up the effect.

@Certbros 7 жыл бұрын

Thanks Pieter! I'll try that out next time. Great channel by the way.

@viniciuscastro4281 6 жыл бұрын

Such a clear explanation, I understood everything. This video has a incredible didatic. Thank you :)

@Certbros 6 жыл бұрын

Thanks Vinicius!

@wilsonhawkins1048 3 жыл бұрын

This is the best explanation I've seen on the differentiation between network devices. Thanks!

@Certbros 3 жыл бұрын

Great to hear! Thanks Wilson.

@karhadd 7 жыл бұрын

What a lifesaver! Thanks.

@Certbros 7 жыл бұрын

You're welcome! Thanks.

@AdnanKhan-sc7tk 7 жыл бұрын

this was amazing.. now i can say that i know the basics of networking devices..very undersandable..thank you sir

@Certbros 7 жыл бұрын

Thanks Adnan!

@ft.tanisha.__ 3 жыл бұрын

Hubs and switches are used to create network while router is used to connect networks

@Certbros 3 жыл бұрын

That's a great way of thinking about it 👌

@leonmehrab9727 7 жыл бұрын

Easy to understand. Thank you CertBros. Thumps up (y)

@Certbros 7 жыл бұрын

You're welcome Leon. Thanks for the comment and thumps up.

@luketaylor6878 2 жыл бұрын

Hello I am thrown off by the terms, do you define a router as different then a modem? Or as the same thing? And a WAP is different then a router? Thanks for your videos.

@themistoclesnelson2163 3 жыл бұрын

I like it how every time I have a networking question, you have a video for it, whether it be new or old.

@Certbros 3 жыл бұрын

Haha! Great to hear! Hopefully I can keep making videos to keep up with your questions 😁

@themistoclesnelson2163 3 жыл бұрын

@@Certbros Get ready to make some videos because they never stop😜

@Certbros 3 жыл бұрын

@@themistoclesnelson2163 Haha! I'll try my best!

@missmegan9208 6 жыл бұрын

Very helpful for A-Level computer science. Thanks.

@Certbros 6 жыл бұрын

Thanks Miss Megan! Good luck with the A levels!

@carlodurian3730 7 жыл бұрын

Wow! How informative! Thank you!

@Certbros 7 жыл бұрын

Thanks Carlo!

@itaybarok9405 2 жыл бұрын

So helpful thanks a lot. Also, can you dive deeper into bridge and switch way of saving the source mac address and sending to the destination mac address. Thank you for thus content! Can you make a full and complete video on using wireshark in networking? You are truely helpful and you will be great channel keep up the good work.

@Certbros 2 жыл бұрын

Great suggestion! I'll add these to my list 👍

@Brock90 2 жыл бұрын

really clear video, i now know more about how this stuff works thank you

@stephengoh5456 3 жыл бұрын

Super helpful! Love it. Thank you.

@Certbros 3 жыл бұрын

Thanks Stephen!

@aayshasafare1959 2 жыл бұрын

Class 12 computer science student here! these really helped me revise my computer networking portion.. Thanks!

@brolife3630 4 жыл бұрын

Very nice explaination... I really like. Thnks❤

@Certbros 4 жыл бұрын

You are welcome 😊

@sourakantimandal6026 3 жыл бұрын

Just Loved all ur videos ! Wanna say Whooooo ! Now I know it ! 👍 Thanks a lot

@Certbros 3 жыл бұрын

HAHA Love it!! Thank you.

@s4nzuu921 3 жыл бұрын

Thank you thank you. You helped me alot. Now I can answer my module in css subject

@Certbros 3 жыл бұрын

Glad to hear it! You're welcome. 👍

@whatever63644 6 жыл бұрын

I have a question on the switch: What if i have 8 computers connected through a switch and on computer #1 i want to send a message to all other computers or just a few computers. What would happen?

@Certbros 6 жыл бұрын

When computers need to send a message to all other computers, this is called a broadcast message. The destination MAC will be ffff.ffff.ffff. This tells the switch to forward the frame out of all ports expect the receiving one. If it's just a few computers, then it might send a multicast message.

@deandramartin3598 6 жыл бұрын

Hi! You stated that a switch has multiple collision domains. Could you elaborate on what is meant by that?

@hakeem4793 3 жыл бұрын

when a device communicates with other device they create something like virtual channel through which the data flows. so it doesn't effect the rest of devices and they can start a communication of their own without having to wait for the first two to end.

@manishnayak1345 2 жыл бұрын

This vedio is definately the thing which i was willing to know. thanks @CertBros

@Certbros 2 жыл бұрын

You're welcome

@enzo270792 4 жыл бұрын

Thanks for the crispy clear explanation!

@Certbros 4 жыл бұрын

No problem. Thanks for the comment. Glad you liked it 👍

@chrispainter3602 3 жыл бұрын

Sorry if this is a dumb question, i think the term domain might be throwing my off slightly Is a collision domain separate to the network? like a physical space inside the cable or is it just a term to describe that collisions can occur on that part of the network? For example, every connection from a switch to a device is a collision domain but from one device to another is not a collision domain because its controlled by the switch? Also why in an enterprise situation would the switch and router by separate devices? Is this to do with workload and efficiency?

@Certbros 3 жыл бұрын

No such thing as a dumb question Chris! A collision domain is just a term to describe an area of a network where collision could occur. Bigger networks will need more switches and maybe more routers. As networks grow, its physically not ideal to have switches and routers built together. I hope this helps.

@saskiavanhoutert6081 8 күн бұрын

Thanks for explanation, kind regards.

@Certbros 6 күн бұрын

You are welcome! Thank you for the comment!

@vutominkuna8173 Жыл бұрын

amazing, i really could understand and i am no longer clueless. thanks!

@alexezeoke Жыл бұрын

Every term needed to understand networking is explained clearly. I always come back to Certbros to grasp terms and so clearly.

@Gromst3rr 6 жыл бұрын

Your videos are amazing! Thank you!

@Certbros 6 жыл бұрын

You're welcome! Thanks for the comment!

@Layarion 4 жыл бұрын

like that you explained that the switch replaces them both, and wondering if a switch is the right choice for a home network that has a cable box, wifi router, and like 5 devices that might be watching HD videos or playing/hosting games at the same time. I want to get those 5 devices off of the wifi, and onto a switch. the wifi router is on the long side of the house, and would rather noth buy 5 50foot wires to connect them.

@Certbros 4 жыл бұрын

Yes a switch is perfect for this! Or you could get a WiFi repeater.

@olafzijnbuis 2 жыл бұрын

At 00:38 you mean to say "except the transmitting one." But it is very clear in the animation anyway.

@syedyousafbukhari2213 6 ай бұрын

1:24 little error at this point " this means it can't receive data and receive data at the same time" you meant "send and receive" i suppose. Also, love the short informative vids! I am doing my revision after completing the course and it feels relaxing to just sit through these and do nothing else :P

@reynaldoruizflores 8 ай бұрын

Capacity of de devices in the case of Hub and Switches is divided in the number of ports?

@paulw8205 5 жыл бұрын

those darn rooters!

@visiblehiggs130 Жыл бұрын

well done, after spending time networking this video is excellent.

@user-hy4ih8hk4f 6 жыл бұрын

The voice is boring but it is so useful!!!

@faisalfazli7362 5 ай бұрын

You came here for voice or knowledge?

@aboobakarmohammed1242 4 ай бұрын

Voice ain't boring but the microphone is making you feel so

@Dilloncacat 2 жыл бұрын

thank you this helped me for my exam and i got an a thank you!

@anukshadas5174 3 жыл бұрын

So nicely explained, Thank you!

@Certbros 3 жыл бұрын

Thank you Anuksha! Glad you liked it 👍

@XGamersGonnaGameX 7 жыл бұрын

How does a switch know where the destination computer is without using an IP address? If I want to send a packet from computer A to computer C, what information do I give the switch to know to send it to computer C. I didn't think that packets could contain MAC address which is why I'm confused. Can you explain?

@Certbros 7 жыл бұрын

I'll try and answer this as best I can in a comment. Switches send frames, and frames contain source and destination MAC addresses. Switches learn which MAC address belongs to which port by checking the source MAC address when it receives a frame. Then it adds them to a 'MAC Address table' which lists the MAC address and receiving port number. When computer A sends a frame to computer B, the switch checks the destination MAC address against its MAC address table, if it's listed then it will forward the frame out of the listed port number. If its not listed in the MAC address table, it will send the frame out of every port. Does this help at all?

@XGamersGonnaGameX 7 жыл бұрын

I think that clears it up. Thanks for replying!

@Certbros 7 жыл бұрын

Dawning Knight Awesome! No problem bro

@okey1317 Жыл бұрын

Are these physical devices or some software? I use internet in my home i only a laptop and the wifi modem,

@Randumb96 10 ай бұрын

Clear and concise. Thank you!

@originalhandle27 3 жыл бұрын

Is internal networking the same thing as LAN?

@ItsHornet15Two 6 ай бұрын

lil bro just saved me and my competition tmrw

@debraspann-horne7782 Жыл бұрын

Terrific vid! Thank you for making this so understandable!

@lalith_kumar_akhila2411 4 жыл бұрын

Great Explanation thank you bro😊

@Certbros 4 жыл бұрын

Thanks man! Glad you liked it!

@KutAnimus 7 жыл бұрын

01:22 - Can't receive data and receive data at the same time?

@Certbros 7 жыл бұрын

Qt Animu good spot! Thanks.

@RT-kk2gk 2 жыл бұрын

Very clear and to the point. Thanks.

@xadrec 2 жыл бұрын

Crystal clear explanation. thanks

@sundayirowa3631 6 жыл бұрын

Thanks. Quite explicit

@Certbros 6 жыл бұрын

Thanks!

@mohammadtariqghafori4684 7 жыл бұрын

This was so useful and understandable, Hope we will have more, explained like this. Thank you!!

@Certbros 7 жыл бұрын

+M.Tariq Ghafori Thanks! More videos on the way.

@anukarunwi1652 7 жыл бұрын

Thanks for breaking this down 😊

@Certbros 7 жыл бұрын

You're welcome!

@programmingtutorials3138 7 жыл бұрын

nice one....easy to understand..

@Certbros 7 жыл бұрын

Programming Tutorials Thanks!

@joshuasihombing8340 3 жыл бұрын

Amazing video! Thank you CertBros!

@ChakrasMusicLab 6 жыл бұрын

Thanks for the video. Is it possible to connect any external HDDs to a switch or router and have a PC as well as a mac access them same time? What format the HDDs should be?

@Certbros 6 жыл бұрын

No problem. I think what you are looking for is a NAS (network attached storage) drive.

@ChakrasMusicLab 6 жыл бұрын

Kind of. I bought Seagate Backup plus hub, can I use it to connect to a switch and use with both mac and PC?

@Certbros 6 жыл бұрын

OK. I couldn't say for sure but you could probably share it somehow. Might need to be connected to a computer though.

@terrylevi5771 2 жыл бұрын

Very informative compared to my instructors speedy process lol cyber security analyst here I come!!! 😀

@alonkadosh 2 жыл бұрын

Damn you're channel is good

@cerentaskin5755 2 жыл бұрын

Awesome video, best explanation. Thanks 💌

@user-wg3mm5dm4q 4 жыл бұрын

thank you sir :)

@Certbros 4 жыл бұрын

You're welcome

@rustyam5090 5 жыл бұрын

can you explain clearly fewer ports. thank you

@zohaibniazi6965 Жыл бұрын

Thanks a Lot Brother for this help. Really appreciate it .

@izzyblackout1090 5 жыл бұрын

How do I send data to another pc connected to the same access point?

@Certbros 5 жыл бұрын

That depends. It could be the same as normal unless you are some type of guest WiFi, then there are probably security measures in place.

@AdrianJayeOnline 3 жыл бұрын

very good, nice and clear !

@Certbros 3 жыл бұрын

Thank you!

@Wei-ji9ou 2 жыл бұрын

5:31 does a router use Mac address too ? some tell that they are not...

@Certbros 2 жыл бұрын

Yes absolutely. Although we refer to routers as layer 3 devices, they still use mac addresses and other layer 2 technologies as well.

@Wei-ji9ou 2 жыл бұрын

@@Certbros Thanks you sir, but there 's still something bothering me is that if a router using Mac address can we connect the router directly to devices without using switch ?

@yvantheimpactreviewer3158 7 жыл бұрын

But first you said it can send and recieve, and in the overview you then say it can`t?

@Certbros 7 жыл бұрын

Half-Duplex = Can't send and receive at the same time Full-Duplex = Can send and receive at the same time Hope this clears it up for you.

@yvantheimpactreviewer3158 7 жыл бұрын

Aaaah, ok yeah now i get it :)

@darvinsanpedro1644 3 жыл бұрын

Wikipedia says "Half-duplex or semiduplex system, both parties can communicate with each other, but NOT SIMULTANEOUSLY. the communication is one direction at a time" (copy paste) and you said (0:58) Half-duplex can send data and receive data at the same time without collision. Idiot me said wow i'm confused hahahahahaha

@Certbros 3 жыл бұрын

I say it cant send and receive. The audio is pretty terrible though.

@dkmpala1835 3 жыл бұрын

Great video, well explained & easy to follow. Thank you

@Certbros 3 жыл бұрын

Thanks Daniel! Glad you enjoyed it!

@aurelian7564 4 жыл бұрын

Rooters?

@Certbros 4 жыл бұрын

Rooooters!!

@reyskywalker. Жыл бұрын

Thank you so much sir.. ❤️❤️❤️

@shaswatadas8306 3 жыл бұрын

Thanks sir 🤩🤩

@Certbros 3 жыл бұрын

You're welcome Shaswata!

@hamzakhiar3636 3 жыл бұрын

i couldn't understaznd the differences between 1,2,multiple collision domains can anyone explain please

@MotoSapien99 8 жыл бұрын

Thumbs up, thank you so much!!

@Certbros 8 жыл бұрын

Thanks!!

@jamescurtisxoom 7 жыл бұрын

Any chance you could help, my isp gave me a modem/router, after hooking it up I connected my Asus n55u and used dual wan, I connect all of my kids stuff to this so I can control what they see and for how long they have access to the internet, on my main router from isp there is one ip assigned to secondary router, which in turn gives all the devices there own ips on the second device. I know people talk about dhcp etc so was wondering if I should do something else for it to run more efficiently, I also realised that my speed on secondary router is a lot better than my main router? Any ideas

@Certbros 7 жыл бұрын

I'm not sure I understand your question but I'll give it a go! From what I understand, you are setup like this ISP----ISP Router---Asus n55u---Devices is that right? The simply solution would be to replace your ISP router with your Asus, but this depends is your ISP will let you do that. If not, maybe you could run your Asus as an Access Point only? Maybe someone with a similar setup will stop by...

@jamescurtisxoom 7 жыл бұрын

CertBros isp router -> Asus Router -> devices. I cannot use the Asus router in replacement of my isp router as it's an asdl and my new internet is vdsl I think those are the correct terms. I just know the Asus router has one up address on the isp router and I didn't know if this would cause any conflict as the Asus router is giving out its own ip addresses to the devices connected to it. What does it mean by making it an access point? Would I lose functions of the Asus router such as parental controls and qos for each device if I make it an access point. All seems to be running fine the way I have it I just don't want to run into any future problems

@arjaycuanan8825 3 жыл бұрын

Can you make a video about DNS?

@Certbros 3 жыл бұрын

Thanks Arjay. I'll make a DNS video very soon.

@wartortle577 5 ай бұрын

what's a modem???

@lightingman117 7 жыл бұрын

In 20 years everyone needs to understand these concepts with the rate technology is transitioning towards IP. Thanks for a simple explanation.

@peter9111 3 жыл бұрын

What is an example of the type of data A is sending to C? I don’t understand. I feel so dumb!

@seanyushi9096 Жыл бұрын

Why if I change my ip address, I lose my connection also?

@dswell4173 3 жыл бұрын

What’s a node optical hub?

@ysef1102 Жыл бұрын

Amazing channel

@sanusanu6202 4 жыл бұрын

Thanks

@Certbros 4 жыл бұрын

No problem

@mani9ghotra 7 жыл бұрын

Hi HUBS do not create new collision domain.but you explained it has a 1 collision domain ? please explain.

@Certbros 7 жыл бұрын

Let say you have this setup PC1PC2, this would be classed as one collision domain, meaning PC2 may have to wait for PC1 to stop sending data before PC2 can send its data, otherwise this could cause a collision.

@jackkallis9391 3 жыл бұрын

So realize easily to understand

@Certbros 3 жыл бұрын

Thank you!

@hamedmohamed8594 3 жыл бұрын

Thank you

@Certbros 3 жыл бұрын

You're welcome.

@bernief28 7 жыл бұрын

Really great!

@Certbros 7 жыл бұрын

Thanks! Glad you liked it.

@lillytheboxer9670 7 жыл бұрын

Great video thank you

@Certbros 7 жыл бұрын

Thanks for the comment! Glad you liked it.

@rajasekharanarunthampi7885 3 жыл бұрын

Do you still reply after 5 years?

@Certbros 3 жыл бұрын

I'm still here 🤣🤣🤣

@L1vR-1948 4 жыл бұрын

Thanks for this video :-) 👍

@Exploratorium360 Жыл бұрын

Awesome i just subscribed

@aliekoroma3612 3 жыл бұрын

Good video, I like it. 👍

@Certbros 3 жыл бұрын

Thank you 👍

@sairatna27695 8 жыл бұрын

nice one...worth watching

@Certbros 8 жыл бұрын

Thanks

@100waysofexcersies3 3 ай бұрын

Please some one briefly explain the 1- collision, 2-collision and multiple collision

@ahmadlawalmuhammad2125 3 жыл бұрын

Thank you sir so much

@Certbros 3 жыл бұрын

You're weclome👍

@jackkallis9391 3 жыл бұрын

Wow super lecture

@jackkallis9391 3 жыл бұрын

Congratulations🎉🎁🎁

@leonardojuanpedro9770 6 жыл бұрын

Good basic information

@Certbros 6 жыл бұрын

Thanks!

@lemonade2473 4 жыл бұрын

I thought the modem is the off and on-ramp to the outside world? not the router?

@codywalker9356 3 жыл бұрын

a modem modulates and de-modulates data between the internet and a computer. These days modems will come built into a router in your home

@codywalker9356 3 жыл бұрын

peopole confuse the two and call a router a modem when in fact, they are two seperate devices

@vactum0 4 жыл бұрын

very good, thanks

@Certbros 4 жыл бұрын

Thanks!