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Connectivity
Currently
there is a full 2000 mbps (2GiG-E connections) supplying
our Data Center. In OC fiber line terms thats
close to 3- OC-12 lines and 1- OC-3 line.
The
use of non-blocking gigabit devices throughout the
network ensures regional latency of a few milliseconds
or less, suitable for the most demanding delay-sensitive
traffic. Use of redundant fiber rings ensures network
reliability and availability.
The
data center has connections to many different Internet
backbones including Qwest, AT&T, Level3, Genuity,
Time Warner and Yipes. By connecting to multiple tier
1 backbones, the data can be distributed through many
sources. This architectural design also means that
the network connections are not dependent upon an
single Internet backbone. Thus when problems occur,
traffic rerouting is automatic, thereby ensuring the
integrity of the network and continued access for
our high-speed servers.
This
takes the term multi-homing to a whole
new level. Presently bandwidth utilization is 5% during
peak traffic times. Therefore, the network is very
flexible. If one of the backbone connections experiences
problems, the traffic can simply be rerouted over
other paths, thereby ensuring that users receive fast
access times to sites hosted on our network.
In
addition, the network runs Border Gate Protocol (BGP4).
BGP is used at a provider with more than one access
point to the Internet. It helps create a truly redundant
network. In fact, in an ideal situation, a lease line
failure should result in the BGP routing session to
close on the bad leased line and the router on a working
circuit should then begin to accept the additional
traffic. In other words, traffic from a down circuit
is redistributed across other circuits, thereby maintaining
network integrity. Providers that are multi-homed
and correctly setup can actually be more reliable
than a single backbone provider because they have
multiple paths to multiple providers.
Internal
Connectivity
A
provider's local area network is not often enough
being seen as a point of latency.
The
two main sources of latency for a full-time Internet
connection are the user's local area network and the
Internet provider's local area network. Ether switches
and high-end Juniper routers anchor the local network.
This top-of-the-line network hardware ensures that
data requests get to their destination and back out
of the network as fast as possible.
We
use ether switches instead of hubs because of their
speed and their security capabilities.
Whereas only one computer plugged into a hub can talk
at one time, all the machines connected to a switch
can talk at the same time.
This
means more data can travel through a switch and each
server acts as its own node on the network. Furthermore,
since each server is its own node on the network,
it is difficult for hackers to trace data packets
with sensitive information (i.e. passwords) to a particular
server.
Servers
on the network do not share a single path (T3). Instead,
the servers are connected into a high-speed Ethernet
switch. This switch is connected to the core router
at the data center.
From
the core router, data is sent back to the end user
across the fastest available path. Whereas statically
routing traffic over one path creates a single point
of failure, this distributed architecture ensures
that users can access data extremely quickly and have
multiple paths both into and out of our network.
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