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Like the posters above said, you don't need to have a home lab for it.
Grab a copy of the Network+ book - I went with Sybex Network+ book by Lammle at the time. Read up & Google for more info.
But...
If you'd like to get a practical feel for the basics, the components you'd need are simple -
A switch, a spare or old PC, a wireless router, some Cat5, etc.
Learn how to do basic file sharing, setting up a WAP, installing a NIC, making an ethernet cable - if you don't know how to already.
In my opinion, the practical route assists in learning the basic concepts faster plus it's just downright fun.
What I generally recommend to people looking to learn networking is.
1: An ESX / Hyper-V / XenServer / etc etc etc hypervisor. Preferably ESXi because it gives you more options.
2: A *nix based firewall. Weather your using something like CentOS with IPTables, or pfSense, or Untangle etc. Again gives your more options for firewalling, VPN, routing, IDS, etc. Personally I run mine on a ESXi box so that I can play around with multiple without having to have multiple hardware sets.
3: A Managed switch. Something preferably with a CLI. I find that the Dell Powerconnect 5324 is a good recommend because of the price.
4: A stand alone access point.
Basically this will give you all the pieces of a network you would need to learn and play with. With the server being virtual it makes throwing up extra servers extremely easy.
Never could get CentOS to install for some reason, I did manage to get Ubuntu server up and running.
I have a question, could I use one of the small 8-port switches you can buy from a retail store to do the same thing as using one of the big rack mount switches that ya'll recommended?
I really can't tell a difference between them just from reading the descriptions.
Never could get CentOS to install for some reason, I did manage to get Ubuntu server up and running.
I have a question, could I use one of the small 8-port switches you can buy from a retail store to do the same thing as using one of the big rack mount switches that ya'll recommended?
I really can't tell a difference between them just from reading the descriptions.
If you want to learn networking you will need a smart (managed) switch. Most retail stores sell dummy switches.