Collision Domain and Broadcast Domain || Ethernet || Hub || Switch || Router

a domain is a region where a particular set of  rules apply or where an activity takes effect   for example a school environment is a domain that  is meant for learning and it has some well-defined   rules a market is a domain where buying and  selling of items take place the key concept in   a domain is that it defines an area where a given  rule is valid or where control can be achieved on   ethernet based networks we often hear the terms  collision domain and broadcast domain today we'll   learn how to properly identify a collision domain  and a broadcast domain on a computer network hello guys today we'll talk about collision  and broadcast domains let's play a game called   electrocution in this scenario all cats are  connected directly to the cable that supplies   power when we turn on the power source all the  cats will feel the shock since all of the wires   are joined together in networking these cats  are said to be on the same collision domain   since they receive the shock together a hub  provides this functionality for computers   as every device on the same collision domain  receives the same message sent from a source in the second scenario we install a switching unit  here so that all cats will be isolated from one   another when we activate the power source no cat  will be electrocuted at first we can electrocute   any cat of our choice by performing the right  connection on computer networks we say they   are on different collision domains based on that  isolation and a switch provides this functionality   we can also send data to one multiple or all  computers based on what is called a mac address   let's talk in networking terms now what  is a collision domain a collision domain   is a physical segment of a network where there is  a possibility of signals colliding with each other   unless otherwise stated in this presentation  all links work in half duplex mode meaning that   you cannot send and receive data simultaneously if  both devices attempt sending data at the same time   a collision may occur for this reason we say the  entire region where there is a possibility of a   collision is called a collision domain although  a collision domain may be larger in size it will   still be considered as one collision domain so if  only pca and pcb were to exist on this link this   is one collision domain if this link allows for  sharing other devices may expand this collision   domain and make it larger but it is still one  collision domain a bus network like this one   for example is a single collision domain network  because all links directly connect to one another   if we use a hub instead we still have  a single collision domain because a hub   logically functions like a bus network in  summary a segment consisting of only cables   and or physical layer devices such as a  hub results in just one collision domain   what is a broadcast domain firstly we need to  know that hubs always send data in broadcast mode   and switches may send data in broadcast mode  only when necessary with this a broadcast domain   is any region of a network through which message  broadcasts can be propagated continuously without   interruption basically a broadcast domain ends  where a layer 3 device exists such as a router   let's get this concept from this animation  assuming pca sends a broadcast message on   the network it is received by hub a Hubs send  broadcast by default so it floods the message   and a copy of this message reaches switch a  switches will always flood messages that are   specifically broadcasts switch a floods the  message to all of its connected interfaces   looking at the scope of the message so far  all devices are on the same broadcast domain   since they receive a broadcast message sent by  pca this network consists of one broadcast domain   if we attach another network here using a switch  and a couple of computers we can now see that we   have two broadcast domains on this network why is  this a router will receive and process a broadcast   message but it will not forward the broadcast  message into another network sometimes broadcast   domains are referred to as local area network  segments finally every interface on a hub belongs   to the same collision domain every interface on  a switch belongs to a different collision domain   and every interface on a router belongs  to different collision and broadcast   domains with this basic information how many  collision domains do we have on this network   there are eight isolated segments on this  network hence there are eight collision domains   check out the questions on the  next slide if you like this video   you can give it a thumbs up and subscribe to  our youtube channel don't forget to turn on   notifications so you'll be the first to know when  we release a new video thank you for watching you

Channel: Physical Logik

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Keywords: collision domain and broadcast domain, Broadcast domains and collision domains, broadcast and collision domains, collision vs. broadcast domain, broadcast domain, collision and broadcast domain, broadcast domains and collision domains, collision domain, hub switch router, collision domain vs broadcast domain, Auto-negotiation on Ethernet, collision domains on a hub versus a switch, collision domain and broadcast domain in hub, collision, broadcast domain vs collision domain

Id: p-31IlCfY84

Length: 6min 22sec (382 seconds)

Published: Sun Jul 25 2021