Comments on: What are the differences among network hubs, network switches and networ routers? http://www.skr-parents.com/networking-switches/what-are-the-differences-among-network-hubs-network-switches-and-networ-routers Wed, 14 Jul 2010 07:25:41 -0400 http://wordpress.org/?v=2.8.4 hourly 1 By: badaz06 http://www.skr-parents.com/networking-switches/what-are-the-differences-among-network-hubs-network-switches-and-networ-routers/comment-page-1#comment-981 badaz06 Sun, 31 Jan 2010 22:26:59 +0000 http://www.skr-parents.com/networking-switches/what-are-the-differences-among-network-hubs-network-switches-and-networ-routers#comment-981 In computers and networking, information passed back and forth over the internet are divided into 7 layers, called the OSI model. The OSI model is important because it a "guide" that all manufacturers have to adhere to, to use TCP/IP (That way you dont have different companies using different standards, some of which dont work with others) Physical - The actual ethernet cable, phone line, fiber cable Data - How the 2 devices on either end of the cable talk to make sure what you're sending is what the other is getting. Network - This would be your IP address. Kind of like your mailing address. (IP works here) Transport - In basic terms, handles traffic, sets up connections between computers/servers/etc. (TCP works here) Session - Handles the communications between programs and applications and TCP/IP. Presentation - how information is presented to you, Jpgs (pictures) are one example. Application - The actual application on your system. Hubs work on layer 1. It's the physical media that's important here. A switch works at layer 2. If you go into a command window and type ipconfig /all You'll see what's called a physical address. This is also known as a MAC address, and is what switches use to determine how traffic is to be routed. Routers work on Layer 3. They are responsible for directing traffic between routers, or routers and switches. Using the same command as above you'll see your IP Address. The Router uses IP Addresses when communicating. Even though we may see www.yahoo.com when we type things into our browser, if you type in nslookup www.yahoo.com You'll see that there's actually an IP address assigned to yahoo.<br><b>References : </b><br>I teach this stuff :) In computers and networking, information passed back and forth over the internet are divided into 7 layers, called the OSI model. The OSI model is important because it a "guide" that all manufacturers have to adhere to, to use TCP/IP (That way you dont have different companies using different standards, some of which dont work with others)
Physical – The actual ethernet cable, phone line, fiber cable
Data – How the 2 devices on either end of the cable talk to make sure what you’re sending is what the other is getting.
Network – This would be your IP address. Kind of like your mailing address. (IP works here)
Transport – In basic terms, handles traffic, sets up connections between computers/servers/etc. (TCP works here)
Session – Handles the communications between programs and applications and TCP/IP.
Presentation – how information is presented to you, Jpgs (pictures) are one example.
Application – The actual application on your system.

Hubs work on layer 1. It’s the physical media that’s important here.
A switch works at layer 2. If you go into a command window and type ipconfig /all You’ll see what’s called a physical address. This is also known as a MAC address, and is what switches use to determine how traffic is to be routed.

Routers work on Layer 3. They are responsible for directing traffic between routers, or routers and switches. Using the same command as above you’ll see your IP Address. The Router uses IP Addresses when communicating.

Even though we may see http://www.yahoo.com when we type things into our browser, if you type in nslookup http://www.yahoo.com
You’ll see that there’s actually an IP address assigned to yahoo.
References :
I teach this stuff :)

]]> By: lanster_chennai http://www.skr-parents.com/networking-switches/what-are-the-differences-among-network-hubs-network-switches-and-networ-routers/comment-page-1#comment-980 lanster_chennai Sun, 31 Jan 2010 21:52:59 +0000 http://www.skr-parents.com/networking-switches/what-are-the-differences-among-network-hubs-network-switches-and-networ-routers#comment-980 solving information 1.network hub is static repeater 2.network switch is dynamic repeater 3. router is IP manager or provider (either in static or DHCP mode)<br><b>References : </b><br> solving information 1.network hub is static repeater 2.network switch is dynamic repeater 3. router is IP manager or provider (either in static or DHCP mode)
References :

]]> By: David D http://www.skr-parents.com/networking-switches/what-are-the-differences-among-network-hubs-network-switches-and-networ-routers/comment-page-1#comment-979 David D Sun, 31 Jan 2010 21:22:59 +0000 http://www.skr-parents.com/networking-switches/what-are-the-differences-among-network-hubs-network-switches-and-networ-routers#comment-979 Hubs are basic, everything going in one one ports comes out on the others. Switches are smarter, they learn which computers are on which ports and direct traffic to just the port where the computer it is addressed to lives (if it has learnt where that computer is at that point). Routers are programable and can direct traffic between different networks (e.g. the internet, a DMZ, and a LAN).<br><b>References : </b><br> Hubs are basic, everything going in one one ports comes out on the others.

Switches are smarter, they learn which computers are on which ports and direct traffic to just the port where the computer it is addressed to lives (if it has learnt where that computer is at that point).

Routers are programable and can direct traffic between different networks (e.g. the internet, a DMZ, and a LAN).
References :

]]>