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Glossary
What is a "U"?
A "U" is a Rack Unit, a unit of measurement of verticle rack
space for Colocation.
1U is equal to 1.75 inches, 2U is 3.5", 3U is 5.25"
and so forth.
Transfer/month:
This refers to the total amount of data transferred to
and from your site each month, including web, FTP, email,
and all other traffic. We measure the traffic directly from
our router, which guarantees that any traffic we count was
really used.
Example: Every time one of your web pages is viewed by
someone on the internet, the size of that page goes towards
your bandwidth usage. Below is an example of how many times
a page would have to be viewed to reach 20GB of transfer
Page size 30kb = 349,525 views
Page size 40kb = 262,144 views
Page size 50kb = 209,715 views
Page size 60kb = 174,762 views
95th Percentile Explained:
Samples of your actual bandwidth usage are taken every
five minutes from your VLAN port on the switch. The program then averages
the totals and posts the result as a five-minute usage point
on your report. Over the month, we will continue to plot the
five-minute averages, which total about 8,640 points plotted
on the graph.
We then take the top five percent of your usage (432
points, or 36 hours) and throw it out!
Your usage is determined based upon the highest remaining
usage plotted. This method of billing provides you with a
number of advantages. Any usage bursts that are untypical of
your bandwidth requirements are not charged to you, and this
equates to receiving approximately your highest 36 hours of
bandwidth usage free each month.
We then give you access via the web to view your Daily,
Weekly, Monthly bandwidth graph reports at any time. If your
package(s) include a specific amount of bandwidth, any
overage(s) will be billed at your contracted rate at end of
the calendar month.
The Texas Network's dedicated-based bandwidth is a
burstable access, which uses the "sustained usage" formula
to determine the monthly access rate. At the end of each
month of service, based on readings taken every 5 minutes,
which are placed in ascending order, the 95th percentile is
determined as the "sustained usage rate".
VLAN (Virtual Local Area
Network):
A VLAN is a group of PCs, servers and other network
resources that behave as if they were connected to a single,
network segment — even though they may not be. The resources
and servers of other users in the colocation facility will
be invisible to each of the other VLAN members.
Equally important, VLANs help meet performance needs by
segmenting the network more effectively. Unlike standard
switching, they restrict the dissemination of broadcast as
well as node-to-node traffic, so the burden of extraneous
traffic is reduced throughout the network. Security can also
be improved. Since all packets traveling between VLANs may
also pass through a router, standard router-based security
measures can be implemented to restrict access as needed.
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