Question : Switch Basics

Ok, I'm looking either for an explination or a link to a very good explination of the diffrent types of network switches out there. I've currently got a "Workgroup switch" on my network and I would like to know why the $2000 switches are worth the money. I'm ignorant and am seeking some schooling.

Be sure to explain what the diffrence is between the diffrent types of switches (workgroup, atm, ect) and how they affect a netoworks performance.

Thanks guys, I hate being a newbie.

Answer : Switch Basics

Your "workgroup" switch is probably a non-managed (or "dumb") switch.  Higher-end switches are typically managed (or "smart"), and offer greater control of the network.  Any switch that is providing access (or distribution) level services is a "workgroup" switch (whether smart or dumb).  Next up from access switches are distribution switches -- these feed connections from access switches back into backbone, or "core" switches.

The primary difference is the ability to configure specific behaviors in a switch for your needs.  Examples are VLANs, QoS, access lists, and even routing.  In the typical small business place, managed switches are often seen as unnecessary, especially since the controls on the network are so far "out of control" in every other respect.  High end switches are particularly useful for larger organizations that truly wish to segment their network based on organizational needs, but also need to do this efficiently within the confines of an imposed structure (i.e. a building or campus).  A single switch can logically separate connected hosts to the extent that it is "virtually" ten switches, for instance.  Another primary use for high-end switches is the ability to classify and prioritize traffic, giving precedence to special needs (such as Voice over IP).

In terms of the technologies involved, there are ATM switches (a special breed that is designed for "backbone" switching), and fiber switches, and Ethernet switches, among others.