collision vs. broadcast domain: Hub, Switch and Router

hello and this is sunny welcome back today my topic is clearing dumbing and a broadcaster dummy but in order to understand these two concepts I am asked to talk about three networking devices at the same time this three networking devices a hop switch and a router let me talk about hub first hub operates at layer 1 or the physical layer over the OSI model is a dhama device it never thinks no I Q we hub again signals from one node it will forward them to all other connecting the nodes a hub creates and it expands a collision dummy and what is collision dummy in a Ethernet network or tcp/ip network a clearing dummy is a group of a notes that can hear each other when one node is using hub all other nodes must wait clicking occurs when to nose send the signals at the same time if the clearing dummy gets too large you all start running into a traffic problems if you try to daisy-chain or cascade some hubs you actually expand the collision dummy the more hops we use on a local network the larger collision doming we create now let's talk about a switch traditional switches operate at layer two or data link layer of the OSI model while the modern switches can operate at layer 3 or even layer 4 but here we'll only talk about a traditional to device a switch is much smarter than hub and because is it gives every conversation the full bandwidth of the network for example when node a is talking only is receiver B can here we note say is talking and only is a receiver D can hear communications become one-to-one conversations both a and C can talk at at the same time no collision would occur thus switch separates the collision dummy when first returned our switch copies the source MAC addresses and abuse a table of America addresses of each note this map table is called source address table or simply set switch uses the table to create point-to-point connections between each appear our communications notes even with the more nodes are connected to the switch switch still give every conversation full bandwidth of the network therefore switch separates collision domains but creates a broadcast dummy now what's the broadcast dummy a broadcast domain is a group of notes where they can reach each other by a broadcast specifically any node using 12 apps as a destination MAC address is broadcasting any other node can hear a broadcast rotor operates at layer 3 or the network layer of the OSI model rotors only forward IP packets based on the IP address rotors not only separate collision domains but also separate broadcast domains look at these three separate local area networks red purple and a grain connected by a rotor any composition in red land would not be heard by purple and a green local networks even broadcasting in the red area would not go across the boundary set by the rotor in summary a hub creates an expense both clearing dummy and broadcast dummy a switch separates collision dummy but a creates a broadcast dummy a rotor separates both collision and broadcast dummy I hope this video is helpful and please feel free to leave your question below if I didn't make myself clear I will reply to you as soon as possible thank you very much and see you next time [Music] you [Music]

Channel: Sunny Classroom

Views: 114,112

Rating: 4.9548411 out of 5

Keywords: sunnyclassroom, networking+, cybersecurity, security+, networking +, cyber threats, cyber defense, IoT, Wi-Fi security

Id: ck3gx9HB9-k

Length: 5min 54sec (354 seconds)

Published: Fri Mar 02 2018