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love_76_in
Member since:
2002-04-10 02:34:07 |  posted: 2002-04-12 12:21:15
VPN and VLAN ?
----------
Diffrenace bettn VLAN and
VPN
??
advantages
of VLAN
?
regards,
love | Pierre
Member since:
2002-04-05 06:32:45 |  posted: 2002-04-17 03:24:26
url
----------
Read this article maybe
it can
help
http://www.intern
etweek.com/VPN/paper-2.ht
m
vpnlabs.com is
very well done and you
can find all you need
just clicking at the
right place | kmag
Member since:
2002-07-03 18:01:09 | posted: 2002-07-03 19:21:53
explaning the terms
----------
VLAN (IEEE IEEE 802.1Q)
is a technology that
virtually merges multiple
separated (by routers,
switches) LAN segments in
one broadcast domain.
This new Virtual LAN
appears to its users as a
regular LAN, as if all
resources were located in
the same LAN. The general
idea is that ethernet
packets are tagged with
identifiers that indicate
the VLAN from which the
packet came. Reasons for
using VLANs are:
a) To
confine broadcasts and
multicasts (increase
security and
performance)
b) To
create functional
workgroups (accounting
department, sales
department)
c) To
simplify administration
(when moving machines
around you only have to
change the VLAN settings,
not the whole
cabling)
d) To
eliminate routers
(routers do not propagate
broadcasts/multicasts)
VLAN is a technology
for local ethernet
networks that provide
managability features and
some security. In no case
can it be used across
large ISP backbones to
provide encrypted
channels.
A VPN on
the other hand, is
defined as a logical
network created within a
shared infrastructure
(such as the Internet)
which retains the
properties of a private
network: a) private
communication and b) a
certain level of quality
of service. Techniques
used when implementing a
VPN are ATM/Frame Relay
virtual circuits,
encyrpted channels,
authentication between
peers, firewalls,
tunneling
protocols.
As you
can see, VPNs are much
more complicated than
VLANs. They serve mostly
the private communication
needs of remote sites and
can be spread over a
variety of physical link
technologies, such as
ATM, Dialup
PSTN/ISND/ADSL, ethernet,
leased lines and so
on.
Helpful link
about VLANs:
http://www.cis.ohio-state
.edu/~jain/cis788-97/virt
ual_lans/index.htm
About VPNs you can find
plenty stuff from
VPNLabs.org :-)
I
hope these light thinks
up for you.
~kmag |
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