Switch? Hub? and other ethernet questions

[Guest_imported]

I have always come across terms like 'ethernet hub' and
'ethernet switch'. What is the difference. What is the max.
distance between a pc (or workstation) and a hub with a
cat5 cable connection. What is the mini distance? Is there
any product with a ethernet card and a hub in one piece?(I
mean an internal add-on card that serve both function).
Hardware (or software ) Firewalls prevent intruders from
outside, do they provide functions like locking users to
predefine sites and no others (similar to net-nanny but
more sevre limitations)


Your input will be much appreciated

 

[edfair]

Suggest that you join the ethernet forum.
Hub is a connection point for forwarding signals to all devices connected to it. Switch is a hub that forwards traffic that has a destination known to it.
110m max/ 0 m min.
No combo that I'm aware of.
Also suggest a google search for ethernet specifications. Ed Fair
unixstuff@juno.com
Any advice I give is my best judgement based on my interpretation of the facts you supply. Help increase my knowledge by providing some feedback, good or bad, on any advice I have given.

 

[DMAN666]

just wanted to add that a switch also distributes the bandwidthequally to all the nodes on the LAN.

 

[Eguy]

Hi DMAN666

Your statement is true for an un-managed switch. A managed switch will send only to the correct node. But you pay the BIG BUCKS for that feature.

Ed Please let me know if the sugestion(s) I provide are helpful to you.
Sometimes you're the windshield... Sometimes you're the bug.

 

[compucon]

There is a pci card that acts as a ethernet card and a hub but they are not cheap

 

[Guest_imported]

compucon

Can you please point to me where I can get them (or at
least some info about it) Tks

 

[CitrixEngineer]

If you live in the UK,

http://www.scan.co.uk

do a 5-port switch hub for £25! I have one on my home network, and an 8-port in my test lab.

One advantage of switches that has not been pointed out is the auto-negotiation of network speeds (you can mix 10 and 100Mb/sec NICs on your network), and the ability to duplex - effectively have your network talk at 200Mb/sec with simultaneous bi-directional traffic.

To connect your internal LAN to the internet via a Firewall, you'd be better off with a Router. Many ADSL routers have built-in multi-port switches and USB modem connections.

I hope this helps

CitrixEngineer@yahoo.co.uk

 

[Guest_imported]

CitrixEngineer,

Tks for input. What about the destination URLs? Can the
Firewall be set to access predefined sites for users or the like?

 

[Eguy]

Peter_Chung;

Controlling destination URL's is outside the scope of a firewall. Firewalls work with ports. You can open or close a specific port, in the case of internet access, port 80, but not a specific url. You can set web browses to filter certain types of sites. In Internet Explorer click on Tools > Internet Options > Content.

Ed Please let me know if the sugestion(s) I provide are helpful to you.
Sometimes you're the windshield... Sometimes you're the bug.

 

[CitrixEngineer]

If you're wanting to restrict access to users, then you need a filtering product like Cyber Patrol.

You could possibly implement some kind of policy to do this, but it looked too complicated, so I bought Cyber Patrol. CitrixEngineer@yahoo.co.uk