router contains a built-in switch versus router without a built-in switch

What's the differences between

router contains a built-in switch
and
router without a built-in switch??

Some routers even have built-in firewall.

I saw many routers in the market has built-in switch, but I don't know
why, and what's the advantages?

please advise. thanks!!

(E-Mail Removed) wrote:

> What's the differences between
>
> router contains a built-in switch
> and
> router without a built-in switch??
>
> Some routers even have built-in firewall.
>
> I saw many routers in the market has built-in switch, but I don't know
> why, and what's the advantages?
>
> please advise. thanks!!
>
The combination might be cheaper than the two parts separately.
And then it's only one thing to plug in.

It's like stereo equipment. You can buy a receiver, or you can
buy separate amplifier and tuner and connect them together.

--
The e-mail address in our reply-to line is reversed in an attempt to
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<(E-Mail Removed)> wrote in message
news:(E-Mail Removed) oups.com...
> What's the differences between
>
> router contains a built-in switch
> and
> router without a built-in switch??

A router with a built-in switch works on the same principles as a standalone
switch. A router with a built in switch can be configured to just be a
switch and not a router by disabling the DHCP server on the router and then
it's just a standalone switch.

http://www.homenethelp.com/web/expla...d-switches.asp

I don't know about routers without a built-in switch.

>
> Some routers even have built-in firewall.

Some routers use a packet filter FW solution like SPI some don't and some
routers use more than SPI a more powerful packet filter.

Most NAT routers for home usage fall into the category of the link below.

http://www.homenethelp.com/web/explain/about-NAT.asp

About firewalls

http://www.more.net/technical/netserv/tcpip/firewalls/

What does a computer, router or appliance running a network/Internet FW do?

http://www.firewall-software.com/fir...rewall_do.html

>
> I saw many routers in the market has built-in switch, but I don't know
> why, and what's the advantages?

see link above about hubs and switches

Duane

From: "Duane Arnold" <(E-Mail Removed)>

|
| <(E-Mail Removed)> wrote in message
| news:(E-Mail Removed) oups.com...
>> What's the differences between
>>
>> router contains a built-in switch
>> and
>> router without a built-in switch??
|
| A router with a built-in switch works on the same principles as a standalone
| switch. A router with a built in switch can be configured to just be a
| switch and not a router by disabling the DHCP server on the router and then
| it's just a standalone switch.
|
| http://www.homenethelp.com/web/expla...d-switches.asp
|
| I don't know about routers without a built-in switch.
|
>> Some routers even have built-in firewall.
|
| Some routers use a packet filter FW solution like SPI some don't and some
| routers use more than SPI a more powerful packet filter.
|
| Most NAT routers for home usage fall into the category of the link below.
|
| http://www.homenethelp.com/web/explain/about-NAT.asp
|
| About firewalls
|
| http://www.more.net/technical/netserv/tcpip/firewalls/
|
| What does a computer, router or appliance running a network/Internet FW do?
|
| http://www.firewall-software.com/fir...rewall_do.html
|
>> I saw many routers in the market has built-in switch, but I don't know
>> why, and what's the advantages?
|
| see link above about hubs and switches
|
| Duane
|

Duane:

Disabling DHCP on a Router with an E-Switch is often insufficient. uPnP would also have to
be disabled. There have been posts about this here, in dcom.modems.cable and dcom.xdsl.
Disabling the Router part will depend upon the vendor and model Router+E-switch.

One last point. SOHO Router's with built-in E-switches tend to have high switching
latencies. Thus their cheap price. This may or may not be a problem in a SOHO environment.
For those that need excellent transfer rates between LAN nodes, they may choose to get a
Router without an E-switch and get a managed E-switch from; Foundry, Nortel, 3Com, CISCO,
etc.


--
Dave
http://www.claymania.com/removal-trojan-adware.html
http://www.ik-cs.com/got-a-virus.htm

"David H. Lipman" <DLipman~nospam~@Verizon.Net> wrote in message
news:2%fWe.35908$vQ3.25749@trnddc08...
> From: "Duane Arnold" <(E-Mail Removed)>
>
> |
> | <(E-Mail Removed)> wrote in message
> | news:(E-Mail Removed) oups.com...
>>> What's the differences between
>>>
>>> router contains a built-in switch
>>> and
>>> router without a built-in switch??
> |
> | A router with a built-in switch works on the same principles as a
> standalone
> | switch. A router with a built in switch can be configured to just be a
> | switch and not a router by disabling the DHCP server on the router and
> then
> | it's just a standalone switch.
> |
> | http://www.homenethelp.com/web/expla...d-switches.asp
> |
> | I don't know about routers without a built-in switch.
> |
>>> Some routers even have built-in firewall.
> |
> | Some routers use a packet filter FW solution like SPI some don't and
> some
> | routers use more than SPI a more powerful packet filter.
> |
> | Most NAT routers for home usage fall into the category of the link
> below.
> |
> | http://www.homenethelp.com/web/explain/about-NAT.asp
> |
> | About firewalls
> |
> | http://www.more.net/technical/netserv/tcpip/firewalls/
> |
> | What does a computer, router or appliance running a network/Internet FW
> do?
> |
> |
> http://www.firewall-software.com/fir...rewall_do.html
> |
>>> I saw many routers in the market has built-in switch, but I don't know
>>> why, and what's the advantages?
> |
> | see link above about hubs and switches
> |
> | Duane
> |
>
> Duane:
>
> Disabling DHCP on a Router with an E-Switch is often insufficient. uPnP
> would also have to
> be disabled. There have been posts about this here, in dcom.modems.cable
> and dcom.xdsl.
> Disabling the Router part will depend upon the vendor and model
> Router+E-switch.

OK, I'll go with the uPuP thing, but most of the time that's disabled by
default is it not? It's been awhile since I last looked at a router for home
usage.

>
> One last point. SOHO Router's with built-in E-switches tend to have high
> switching
> latencies. Thus their cheap price. This may or may not be a problem in a
> SOHO environment.
> For those that need excellent transfer rates between LAN nodes, they may
> choose to get a
> Router without an E-switch and get a managed E-switch from; Foundry,
> Nortel, 3Com, CISCO,
> etc.

But for the average home user network where a router was converted into a
switch to plug into a gateway router of FW appliance, I don't think it's
much of a concern. I did that with the Linksys BEFW11S4 v1 router and for
wired or wireless machines using it as a switch, I didn't notice anything.
It was business as usual.

Duane

From: "Duane Arnold" <(E-Mail Removed)>

|
| "David H. Lipman" <DLipman~nospam~@Verizon.Net> wrote in message
| news:2%fWe.35908$vQ3.25749@trnddc08...
>> From: "Duane Arnold" <(E-Mail Removed)>
>>
|>> <(E-Mail Removed)> wrote in message
|>> news:(E-Mail Removed) oups.com...
>>>> What's the differences between
>>>>
>>>> router contains a built-in switch
>>>> and
>>>> router without a built-in switch??
|>>
|>> A router with a built-in switch works on the same principles as a
>> standalone
|>> switch. A router with a built in switch can be configured to just be a
|>> switch and not a router by disabling the DHCP server on the router and
>> then
|>> it's just a standalone switch.
|>>
|>> http://www.homenethelp.com/web/expla...d-switches.asp
|>>
|>> I don't know about routers without a built-in switch.
|>>
>>>> Some routers even have built-in firewall.
|>>
|>> Some routers use a packet filter FW solution like SPI some don't and
>> some
|>> routers use more than SPI a more powerful packet filter.
|>>
|>> Most NAT routers for home usage fall into the category of the link
>> below.
|>>
|>> http://www.homenethelp.com/web/explain/about-NAT.asp
|>>
|>> About firewalls
|>>
|>> http://www.more.net/technical/netserv/tcpip/firewalls/
|>>
|>> What does a computer, router or appliance running a network/Internet FW
>> do?
|>>
>> http://www.firewall-software.com/fir...rewall_do.html
|>>
>>>> I saw many routers in the market has built-in switch, but I don't know
>>>> why, and what's the advantages?
|>>
|>> see link above about hubs and switches
|>>
|>> Duane
|>>
>> Duane:
>>
>> Disabling DHCP on a Router with an E-Switch is often insufficient. uPnP
>> would also have to
>> be disabled. There have been posts about this here, in dcom.modems.cable
>> and dcom.xdsl.
>> Disabling the Router part will depend upon the vendor and model
>> Router+E-switch.
|
| OK, I'll go with the uPuP thing, but most of the time that's disabled by
| default is it not? It's been awhile since I last looked at a router for home
| usage.
|
>> One last point. SOHO Router's with built-in E-switches tend to have high
>> switching
>> latencies. Thus their cheap price. This may or may not be a problem in a
>> SOHO environment.
>> For those that need excellent transfer rates between LAN nodes, they may
>> choose to get a
>> Router without an E-switch and get a managed E-switch from; Foundry,
>> Nortel, 3Com, CISCO,
>> etc.
|
| But for the average home user network where a router was converted into a
| switch to plug into a gateway router of FW appliance, I don't think it's
| much of a concern. I did that with the Linksys BEFW11S4 v1 router and for
| wired or wireless machines using it as a switch, I didn't notice anything.
| It was business as usual.
|
| Duane
|

Duane:

I can't speak for all models of all vendors but, uPnP does come disabled on Linksys.

You are right, the avg. user won't see the latency. However, I have seen it when Ghosting
across a BEFSR81 so I ran some tests with like equipment in 100Mb/s Full-Duplex . When I
used an Intel (discontinued) managed E-switch I got much higher transfer rates than with the
BEFSR81. This translated to Ghosting across the wire took much more time to complete on the
BEFSR81. Unlike the BEFSR41, the BEFSR81 supports QoS and is intended for the business
user.

--
Dave
http://www.claymania.com/removal-trojan-adware.html
http://www.ik-cs.com/got-a-virus.htm

CJT wrote:
> The combination might be cheaper than the two parts separately.
> And then it's only one thing to plug in.
>
If I only want to connect to 3 PC in a LAN, the router has 4 ethernet
ports and it can do the job. If I want to connect more than 4 PC, then
I need a switch. This is the scenario of two parts separately.

I still don't understand because router with built-in switch has 4
ports also, how does it function as the combination of router and
switch together?

Here's different types of routers I looked at:

http://www.linksys.com/servlet/Satel...VisitorWrapper

BEFSR41 EtherFast® Cable/DSL Router with 4-Port Switch V4.0 (4 ports)
BEFSR11 EtherFast® Cable/DSL Router (1 port)
BEFSR81 EtherFast® Cable/DSL Router with 8-Port Switch V3.0 (8 ports)

Another question, if the router has more than 1 port, then it must be
router with built-in switch. Is that correct assumption? Because the
traditional broadband router should only has 1 port?


please advise more... thanks!!

In comp.security.firewalls (E-Mail Removed) wrote:
> I still don't understand because router with built-in switch has 4
> ports also, how does it function as the combination of router and
> switch together?

A router is doing packet forwarding in a special way in layer 3, while
a switch is doing frame forwarding in layer 2, see:

http://en.wikipedia.org/wiki/Router
http://en.wikipedia.org/wiki/Network_switch
http://en.wikipedia.org/wiki/OSI_mod...tion_of_layers

> Another question, if the router has more than 1 port, then it must be
> router with built-in switch. Is that correct assumption?

No. A router at least has two network interfaces, because it's a
multi-homed host.

Yours,
VB.
--
"Es kann nicht sein, dass die Frustrierten in Rom bestimmen, was in
deutschen Schlafzimmern passiert".
Harald Schmidt zum "Weltjugendtag"

(E-Mail Removed) wrote:

> CJT wrote:
>
>>The combination might be cheaper than the two parts separately.
>>And then it's only one thing to plug in.
>>
>
> If I only want to connect to 3 PC in a LAN, the router has 4 ethernet
> ports and it can do the job. If I want to connect more than 4 PC, then
> I need a switch. This is the scenario of two parts separately.
>
> I still don't understand because router with built-in switch has 4
> ports also, how does it function as the combination of router and
> switch together?
>

in essence, its switch has 5 ports -- the fifth one hooks (internally)
to the router -- but they say it has 4 ports because those are the
external ones you can see

> Here's different types of routers I looked at:
>
> http://www.linksys.com/servlet/Satel...VisitorWrapper
>
> BEFSR41 EtherFast® Cable/DSL Router with 4-Port Switch V4.0 (4 ports)
> BEFSR11 EtherFast® Cable/DSL Router (1 port)

I had one of these. I wasn't happy with it. I suspect I wouldn't be
happy with the others, either.

> BEFSR81 EtherFast® Cable/DSL Router with 8-Port Switch V3.0 (8 ports)
>
> Another question, if the router has more than 1 port, then it must be
> router with built-in switch. Is that correct assumption?

yes (theoretically it could be a hub rather than a switch, but I doubt
anybody does that)

Because the
> traditional broadband router should only has 1 port?
>
>
> please advise more... thanks!!
>


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The e-mail address in our reply-to line is reversed in an attempt to
minimize spam. Our true address is of the form che...@prodigy.net.

Volker Birk wrote:

> In comp.security.firewalls (E-Mail Removed) wrote:
>
>>I still don't understand because router with built-in switch has 4
>>ports also, how does it function as the combination of router and
>>switch together?
>
>
> A router is doing packet forwarding in a special way in layer 3, while
> a switch is doing frame forwarding in layer 2, see:
>
> http://en.wikipedia.org/wiki/Router
> http://en.wikipedia.org/wiki/Network_switch
> http://en.wikipedia.org/wiki/OSI_mod...tion_of_layers
>
>
>>Another question, if the router has more than 1 port, then it must be
>>router with built-in switch. Is that correct assumption?
>
>
> No. A router at least has two network interfaces, because it's a
> multi-homed host.
>
> Yours,
> VB.

In the context, I think he meant 1 port on the LAN side.

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The e-mail address in our reply-to line is reversed in an attempt to
minimize spam. Our true address is of the form che...@prodigy.net.