<s>
Juniper	B-Protocol
J	I-Protocol
series	I-Protocol
is	O
a	O
line	O
of	O
enterprise	O
routers	B-Protocol
designed	O
and	O
manufactured	O
by	O
Juniper	O
Networks	O
.	O
</s>
<s>
They	O
are	O
modular	O
routers	B-Protocol
for	O
enterprises	O
running	O
desktops	O
,	O
servers	B-Application
,	O
VoIP	B-Application
,	O
CRM	O
/	O
ERP	O
/	O
SCM	O
applications	O
.	O
</s>
<s>
The	O
J	O
Series	O
routers	B-Protocol
are	O
typically	O
deployed	O
at	O
remote	O
offices	O
or	O
branch	O
locations	O
.	O
</s>
<s>
These	O
Services	O
routers	B-Protocol
include	O
the	O
J2320	O
and	O
J2350	O
for	O
smaller	O
offices	O
,	O
the	O
J4350	O
for	O
medium-size	O
branches	O
,	O
and	O
the	O
J6350	O
for	O
large	O
branches	O
or	O
regional	O
offices	O
.	O
</s>
<s>
The	O
main	O
idea	O
behind	O
the	O
new	O
product	O
line	O
was	O
to	O
create	O
the	O
cost-optimized	O
routing	B-Protocol
system	O
that	O
could	O
utilize	O
increasingly	O
powerful	O
general-purpose	O
CPUs	O
and	O
operate	O
under	O
fully-fledged	O
,	O
multi-threaded	O
OS	O
.	O
</s>
<s>
This	O
was	O
a	O
major	O
departure	O
from	O
"	O
traditional	O
"	O
branch	O
router	B-Protocol
design	O
,	O
which	O
dictated	O
the	O
use	O
of	O
low-end	O
RISC	O
CPUs	O
working	O
under	O
simplified	O
operating	O
system	O
with	O
marginal	O
multitasking	O
and	O
memory	O
protection	O
capabilities	O
.	O
</s>
<s>
From	O
the	O
software	O
perspective	O
,	O
the	O
J	O
series	O
runs	O
JUNOS	B-Application
with	O
a	O
real-time	O
extensions	O
for	O
the	O
forwarding	O
plane	O
function	O
.	O
</s>
<s>
This	O
unique	O
architecture	O
allows	O
J-series	O
routers	B-Protocol
to	O
avoid	O
the	O
"	O
resource	O
starvation	O
"	O
problem	O
commonly	O
seen	O
on	O
legacy	O
software	O
forwarding	O
platforms	O
.	O
</s>
<s>
The	O
J	O
series	O
of	O
routers	B-Protocol
includes	O
the	O
models	O
such	O
as	O
J2320	O
,	O
J2350	O
,	O
J4350	O
and	O
J6350	O
.	O
</s>
<s>
The	O
initial	O
models	O
were	O
J2300	O
,	O
J4300	O
and	O
J6300	O
routers	B-Protocol
.	O
</s>
<s>
The	O
J2320	O
routers	B-Protocol
are	O
entry	O
level	O
service	O
routers	B-Protocol
which	O
gives	O
up	O
to	O
600	O
Mbit/s	O
throughput	O
performance	O
,	O
has	O
four	O
built-in	O
Gigabit	O
Ethernet	O
ports	O
.	O
</s>
<s>
It	O
has	O
three	O
PIM	O
slots	O
for	O
additional	O
LAN/WAN	O
connectivity	O
,	O
Avaya	O
VoIP	B-Application
Gateway	O
,	O
and	O
WAN	O
acceleration	O
.	O
</s>
<s>
The	O
J2350	O
router	B-Protocol
which	O
has	O
four	O
built-in	O
Gigabit	O
Ethernet	O
ports	O
,	O
gives	O
up	O
to	O
700	O
Mbit/s	O
performance	O
.	O
</s>
<s>
The	O
J4350	O
enterprise	B-Protocol
router	I-Protocol
gives	O
up	O
to	O
1	O
Gbit/s	O
in	O
performance	O
.	O
</s>
<s>
It	O
has	O
six	O
PIM	O
slots	O
for	O
additional	O
LAN/WAN	O
connectivity	O
,	O
Avaya	O
VoIP	B-Application
Gateway	O
,	O
and	O
WAN	O
acceleration	O
.	O
</s>
<s>
These	O
routers	B-Protocol
have	O
optional	O
redundant	O
power	O
supplies	O
for	O
high	O
system	O
availability	O
.	O
</s>
<s>
The	O
J-series	O
routers	B-Protocol
run	O
on	O
Juniper	O
's	O
network	B-Protocol
operating	I-Protocol
system	I-Protocol
,	O
JUNOS	B-Application
.	O
</s>
<s>
These	O
routers	B-Protocol
have	O
4	O
on-board	O
GigE	O
ports	O
and	O
expandable	O
WAN	O
and	O
LAN	B-General_Concept
interfaces	O
via	O
pluggable	O
modules	O
.	O
</s>
<s>
They	O
have	O
a	O
wide	O
range	O
of	O
interfaces	O
supporting	O
Serial	O
,	O
T1/E1	O
,	O
FE	O
,	O
DS3/E3	O
,	O
ISDN	O
,	O
ADSL2/2	O
+	O
,	O
G.SHDSL	O
and	O
Gigabit	O
Ethernet	O
and	O
a	O
wide	O
array	O
of	O
Layer	B-Protocol
2	I-Protocol
access	O
protocols	O
including	O
Frame	B-Protocol
Relay	I-Protocol
,	O
Ethernet	O
and	O
Point-to-Point	B-Protocol
Protocol	I-Protocol
(	O
PPP	O
)	O
/HDLC	O
.	O
</s>
<s>
Other	O
features	O
includes	O
Network	B-Protocol
Address	I-Protocol
Translation	I-Protocol
(	O
NAT	O
)	O
,	O
and	O
J-Flow	O
accounting	O
and	O
advanced	O
services	O
such	O
as	O
IPv6	B-Protocol
,	O
MPLS	B-Protocol
,	O
Stateful	O
firewall	O
,	O
quality	O
of	O
service	O
,	O
multicast	O
,	O
VPN	B-Application
,	O
security	O
services	O
and	O
IPSec	B-Protocol
.	O
</s>
<s>
Juniper	O
partnered	O
with	O
Avaya	O
to	O
deliver	O
packet	B-Application
voice	I-Application
functionality	O
.	O
</s>
<s>
J-series	O
routers	B-Protocol
directly	O
benefit	O
from	O
modular	O
and	O
fault-protected	O
software	O
design	O
of	O
the	O
JUNOS	B-Application
operating	O
system	O
.	O
</s>
<s>
Unlike	O
traditional	O
enterprise	O
routers	B-Protocol
,	O
each	O
software	O
module	O
in	O
the	O
JUNOS	B-Application
operating	O
system	O
runs	O
independently	O
and	O
therefore	O
cannot	O
impact	O
other	O
processes	O
.	O
</s>
<s>
The	O
unique	O
,	O
generalized	O
JUNOS	B-Application
architecture	O
provides	O
complete	O
separation	O
of	O
the	O
routing	B-Protocol
and	O
packet	B-Protocol
forwarding	I-Protocol
engines	O
in	O
platforms	O
with	O
both	O
hardware	O
and	O
software	O
forwarding	O
planes	O
.	O
</s>
<s>
Even	O
under	O
DDoS	O
attack	O
,	O
J-series	O
routers	B-Protocol
retain	O
complete	O
control	O
over	O
system	O
operation	O
,	O
allowing	O
console-connected	O
operator	O
to	O
add	O
new	O
filters	O
and	O
policies	O
in	O
order	O
to	O
mitigate	O
the	O
threat	O
.	O
</s>
