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Is the Internet
working now?
Yes , if you are connected to the Internet and
your browsing speed is good, and then browsing gets slow or you lose your
connection to the Internet, then there is a problem somewhere between you
and the Internet.
Does filtering of
URLs (blocking) make the Internet slow?
ISU proxies cause a minor latency not noticed
by the user, and it does not contribute to the occasional slowness users
notice. Currently ISU proxies are running at about half the capacity and we
have more waiting to be installed. you can get more information
on this
page.
How reliable is
the Internet in Saudi Arabia?
As with most businesses, there is no 100%
reliable service. Due to things out of our control (e.g., transit
providers in other countries, local telecom infrastructure, etc.) there is
no way we can guarantee there will never be any service interruptions.
To achieve the best reliability and uptime we
are doing the following:
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Doubling the hardware. That means we have a hot
backup for our hardware.
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For our infrastructures, we have the latest
products from the best vendors.
-
We have very knowledgeable staff and we deal
with some well-known consultation companies.
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We do all the patches and upgrades on time.
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We have 24 hours a day, 7 days a week helpdesk.
Additionally we are doing the following:
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We have (January 2004) six STM-1 links with
about ( 930 Mbps) of bandwidth.
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All the STM-1 links are undersea cable, which
means faster and more reliable service than Satellite links.
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ISU has another center in Jeddah serving as a
backup point of connection although some ISPs are directly connected there .
Why is the
Internet slow?
Here is a short summary of the possible causes:
Bandwidth and latency:
it is important to understand both concepts. For example even if the
road from Riyadh to Jeddah is three lanes wide and has usually very little
traffic (i.e., plenty of bandwidth), it is impossible to make the trip in an
hour, because a car does not go fast enough (i.e., latency). With
satellite links, there is a 500-millisecond roundtrip delay on
communications to and from the Kingdom. The TCP protocol
requires acknowledgements of packets, which can slow throughput
considerably.
Congestion at the international links to
Kingdom:
This is KACST's direct responsibility. Currently we have enough
bandwidth during normal conditions, We are currently operating with six
STM-1 links with a total bandwidth of ( 930 Mbps), Most of the time only
third of This bandwidth is used even in the peak hours , in very rear
occasions when our links are under huge attacks the consumed bandwidth may
reach 70 to 80 % of the total capacity, this will cues slowness in browsing
, but such incidents are very rear and handled immediately by our helpdesk.
Congestion outside Kingdom, at the Internet
backbone:
We have not seen this very often, our service providers usually
keep their networks in good order.
ISU proxies:
They cause some latency, but they
are not a major cause of slowness. Currently the proxies are running at
about half the capacity and we have more waiting to be installed. you can
get
more information on
this page.
ISP proxies, STC ports, and user’s computers:
These all depend on how the ISP, the STC, and the user are keeping their
equipment well-tuned.
Link from KACST to ISP:
This is currently the
major cause of slow browsing. Some ISPs are running over the maximum
capacity of the link. When the traffic from the customers reaches the
maximum bandwidth, the link is fully utilized. At this point "the Internet
is slow". In general, slow response time begins when utilization goes over
90%. go to the ISPs line
status page.
WWW servers:
This is usually a local issue and
should affect only some servers, you can verify this by trying to browse to
different servers.
What are
the sites that ISU is mirroring?
ftp.cpan.org (CPAN is the Comprehensive Perl
Archive Network)
ftp.gnu.org (The GNU Project produces a
complete Unix-like operating system which is free software and open source
programs)
ftp.openbsd.org
(The OpenBSD project produces a FREE, multi-platform 4.4BSD-based UNIX-like
operating system)
ftp.debian.org (Debian is a free operating
system (OS) for your computer)
archive.ubuntu.com (Ubuntu is a free operating system (OS) for your computer)
ftp.isi.edu
(Part of the University of Southern California (USC), ISI is involved in a
broad spectrum of information processing research and in the development of
advanced computer and communication technologies)
ftp.freebsd.org
(FreeBSD is an advanced BSD UNIX operating system for "PC-compatible"
computers)
ftp.xemacs.org
(XEmacs is a highly customizable open source text editor and application
development system)
How can I suggest
a site to be mirrored?
Please visit
this like.
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