Earthweb.com Practically Networked Home Earthweb developer.com HardwareCentral earthwebdeveloper CrossNodes Datamation
Welcome to PractiallyNetworked
Product Reviews

 • Routers
 • Hubs/Switches
 • Wireless Gateway
 • Wireless AP
 • Wireless NIC
 • Network Storage
 • Print Servers
 • Bluetooth Adapters
Troubleshooting
& Tutorials

 • Networking
 • Internet Sharing
 • Security
 • Backgrounders
 • Troubleshooting
    Guides

 • PracNet How To's
User Opinions
Practicallynetworked Glossary

 Find a Network Term  
 
Forums
About
Jobs
Home

  Most Popular Tutorials

• Microsoft Vista Home Networking Setup and Options
The most daunting part of upgrading to Windows Vista may be trying to figure out where in the layers of menus the networking and file-sharing options are hidden.

• Do It Yourself: Roll Your Own Network Cables
It may not be something you do everyday, but having the supplies and know-how to whip up a network cable on the spot can be very handy.

• Tips for Securing Your Home Router
Seemingly minor and easily overlooked settings can still have profound security implications. Here are some steps you can take to make sure your wired or wireless home router and by extension, your network is as secure as possible.

  Most Popular Reviews

• Microsoft Windows Home Server
If you have a home network, you'll welcome the easy file sharing, remote access and the image-based backup features of Windows Home Server.

• Iomega StorCenter Network Hard Drive
Iomega's fourth generation StorCenter Network Hard Drive brings many of the features found in higher-end storage devices down to an attractive price.

• MikroTik's The Dude
This free tool delivers many of the same capabilities that you'd find in pricey network monitoring tools. As long as you don't mind tinkering, The Dude is a decent network utility that should be worth the download.



If you want to know about Bridges, Switches and Routers, see this page.

For more info on hubs, including a few words about hub speed, dual speed hubs, and network starter kits, go here.


A hub is a common connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports. When a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.

In the newsgroups, you frequently see a question something like "Why can't I just plug all the computers and the cable modem into a hub?" 

Connecting the cable modem to the "uplink" or any other port on your hub won't work unless your ISP can provide multiple IP addresses to you.   (Read this for more information.) 

The reason is that the hub is a repeater, not a router.  In simple terms, a hub just takes the data that comes into a port and sends it out all the other ports in the hub. It doesn't perform any filtering or redirection of data among different networks.

Since you need to create a separate network for your LAN, you need to filter the IP traffic between the networks and not simply pass everything on each network to the other. The hub doesn't provide the filtering necessary to keep the networks apart.

There are also messages that advise connecting the uplink port to the cable modem as a way to create two networks. This port is just a convenience provided on some hubs so that you don't have to use a special kind of cable (called a crossover cable) to connect multiple hubs together or connect some devices to the hub. The uplink doesn't perform any filtering or routing.  The uplink port is just a specially wired port that has the connections for the receive and transmit channels reversed. This allows connecting hubs together (sometimes called daisy-chaining) to provide more ports, or to connect a hub to some kinds of network devices (like cable or DSL modems). 

Go to this page for information on how to expand the number of ports on your router, hub or switch.

 



Earthwebnews.com Earthweb developer.com HardwareCentral earthwebdeveloper CrossNodes Datamation


Home | Networking | Backgrounders | Internet Sharing | Security | HowTo | Troubleshooting | Reviews | News | About | Jobs | Tools | Forums