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mavjon
Hi,
what's the difference between a router and a switch..
How many types of router are there ..
I happened to come across two types of router stating one support
internet sharing where the other doesn't ...
please advice...
what's the difference between a router and a switch..
How many types of router are there ..
I happened to come across two types of router stating one support
internet sharing where the other doesn't ...
please advice...
J
Jeff Cochran
what's the difference between a router and a switch..
http://www.webopedia.com/TERM/r/router.html
http://www.webopedia.com/TERM/s/switch.html
Routers route between networks, switches switch between segments of
the same network.
How many types of router are there ..
1
I happened to come across two types of router stating one support
internet sharing where the other doesn't ...
They're both a router. Features that one has over another don't
change that. And "internet sharing" is a sales term, not a technical
one and is meaningless in terms of a router's function.
Jeff
H
Herb Martin
what's the difference between a router and a switch..
It's more complicated by that when you consider the type of switch, and
the fact that many are "hybrid".
Layer 2 switches do what you say and are based on Bridging
Layer 3 switches (sort of) do that, but are actually a form of "router".
Hybrids mix these two capabilities. And VLANs allow for arbitraty
configuration.
Depends on how you count. Perhaps there is only "1 type" of PURE router.
NAT boxes which translate are also a form of routing -- as are almost all
Proxy
servers (which may include NAT and actual Proxying.)
When you add in Layer-3 switching and hybrids the question is seen to be
not fully defined.
NATs and Proxying support network sharing and are in fact a "form of
router."
Right. Microsoft calls their simple NAT, "ICS", and their "RRAS server
version"
by the actual term "NAT" -- NAT also having a variety of technical meanings.
(There is more than one way to do the translation.)
[/QUOTE]
http://www.webopedia.com/TERM/r/router.html
http://www.webopedia.com/TERM/s/switch.html
Routers route between networks, switches switch between segments of
the same network.
It's more complicated by that when you consider the type of switch, and
the fact that many are "hybrid".
Layer 2 switches do what you say and are based on Bridging
Layer 3 switches (sort of) do that, but are actually a form of "router".
Hybrids mix these two capabilities. And VLANs allow for arbitraty
configuration.
Depends on how you count. Perhaps there is only "1 type" of PURE router.
NAT boxes which translate are also a form of routing -- as are almost all
Proxy
servers (which may include NAT and actual Proxying.)
When you add in Layer-3 switching and hybrids the question is seen to be
not fully defined.
NATs and Proxying support network sharing and are in fact a "form of
router."
They're both a router. Features that one has over another don't
change that. And "internet sharing" is a sales term, not a technical
one and is meaningless in terms of a router's function.
Right. Microsoft calls their simple NAT, "ICS", and their "RRAS server
version"
by the actual term "NAT" -- NAT also having a variety of technical meanings.
(There is more than one way to do the translation.)
[/QUOTE]
H
Herb Martin
It might help to know if you understand what a "router" is, and how it works
at the basic level???
Assuming IP here, but routers for "other networking protocols" are usually
similar
or at least analogous.
Routers "forward traffic from one logical IP network to another, allowing
the creation
of internetworks." (This is not a formal definition but a fairly accurate
one that works
for discussion.)
Other features may be added on top of routing; almost always "routers" have
multiple
NICs which mean this forwarding not only moves packets from a logical IP
network
but to a different physical segment.
All of the above ignores the fact that EVERY IP machine "routes for itself";
we don't
usually apply the term "router" unless it does this for OTHER machines.
at the basic level???
Assuming IP here, but routers for "other networking protocols" are usually
similar
or at least analogous.
Routers "forward traffic from one logical IP network to another, allowing
the creation
of internetworks." (This is not a formal definition but a fairly accurate
one that works
for discussion.)
Other features may be added on top of routing; almost always "routers" have
multiple
NICs which mean this forwarding not only moves packets from a logical IP
network
but to a different physical segment.
All of the above ignores the fact that EVERY IP machine "routes for itself";
we don't
usually apply the term "router" unless it does this for OTHER machines.
J
Jim Slager
So what's the difference between a router and a gateway?
H
Herb Martin
Jim Slager said:So what's the difference between a router and a gateway?
Good question and a common source of confusion among newcomers
to networking.
The problem occurs because there are two PRIMARY definitions of
"gateway" used in different networking contexts.
In "IP networking", 'gateway' was the traditional name for router, "a
gateway
to OTHER networks."
In network theory, or 'pure' networking, a gateway is a device distinct from
a router: A gateway is a device that TRANSLATES or CONVERTS one
networking protocol to another.
The term "default gateway" in the IP settings refers to a router.
The term gateway in things such as "SNA Gateway", "Gateway Services for
Netware", "RAS NetBIOS Gateway" (long forgotten by most people), or
even "Exchange can operate as an email gateway between X.400 and SMTP
email systems" is the "translation" version of the word.
SNA gateways translate between typical LAN protocols and those protocols
(SNA) used by IBM mainframes and mid-range computers.
Notice that Exchange acting as an "X.400/SMTP Gateway" is an "application
layer gateway" rather than lower in the OSI model. Such Exchange
deployments
are also "email servers", "email routers", as well as "email gateways."
This brings up the issue that "one physical machine" can be loaded with
multiple
software (or even hardware) capabilities.