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The Applet URLInfo
fetches the next information about URL:
IP Addresses corresponding to the given URL,
HTTP Server Type ( see, for example,
list of HTTP Servers ),
WhoIs Info including the possible server
geographical location.
If your browser doesn't support the Java or resides
behind the firewall use the
Servlet URLInfo !
Java Servlets
are server-side applications that maybe
the best thing that has ever happened to Java.
You needn't Java on the browser side! So, go to the
Servlet URLInfo . It fetches the same information
related to URL:
IP Addresses, HTTP Server Type, WhoIs Info.
The geographical location of URL in Internet
and related issues are discussed, for example, in the
article
Analysing the Geography of Internet Address Space or on the site
Cybergeography.
I have collected some
popular USA's sites using so known collections as
100hot,
Wisecat,
ZDnet
and some other sources.
The information related to
the geographical location of these USA's sites is
found by the Applet URLInfo
and the
Servlet URLInfo.
The WebServers Statistics
contains the histogram describing the distribution of
HTTP Servers.
Apache Server is the
leader - 36%, Netscape Server - 34%,
Microsoft-IIS - 18%, all other HTTP Servers together
(there are 15 servers in the my list) take 12%.
I didn't found information about WW and Yug HTTP Servers.
Maybe it's just a joke?
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Producer
Consumer
Applet
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Producer Consumer View
Thread Monitor View
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Traceroute program
lets us to see
the route of IP datagram which follows from one Internet host
to other. There are many traceroute services on the Internet that lets us
to trace datagramm passing through the Web from different places.
See, for example,
Index of Traceroute Web Servers ,
Traceroute Gateway ,
Multiple Traceroute ,
Geektools Traceroute or
Traceroute List.
Traceroute servlet uses
JNI (Java Native Interface) because the communication engine is written by C. The further
information about JNI see on the
RingLord Technologies
site or in the
Essential JNI book
by Rob Gordon. Some others Traceroute tools using Java may be
found on the Traceroute Animation and
Visualroute sites.
The WhoIs and the Traceroute
are known also as the tools in reducing the volume of spam
you receive:
Death to Spam,
SPAM Acumen.
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The
Traceroute List and Backbone List conains
links to more then 170 Traceroute Servers and more then
30 Backbone Maps sites. Tracerourte List
is ordered by states. About 30 states of the world
provide the traceroute service and approximately
10% of Traceroute sites provide the addition traceroute information
concerning the ASN (Autonomous System Number).
Cybergeography news maybe found on the
Cyberspace Directory
and on the SLAC.
A backbone can span a large geographic area. The
connection points are known as network nodes or Internet eXchange (IX) points.
These points also known as a Network Access Points (NAP)
see on the Telegeography Resource.
The list of
Looking Glass Sites and AS queries on the
Routing Arbiter DB
are provided by Merit Network, Inc.
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TCP Protocol. From PSH to ACK
TCP Connection, TCP Termination
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Seven TCP Timeouts
Acknowledge Mechanisms
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Nagle Algorithm, Sliding Window, Fast Sender Example, Silly Window Sindrome, Slow
Start, Elephant, Congestion Window, TCP segment, Max Segment Size, Urgent Mode,
Out-of-band Concept, Congestion Avoidance, Fast Retransmit, Fast Recovery,
Explicit Congestion Notification, Bandwidth-Delay Product, Fields of TCP Options
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What is the local time?
For the answer see, for example, the
page
Local Times Around the World. The current time
is available for 618 cities on the
Time Zone Page.
The terms Meridian, GMT, UTC are discussed on the
Time Zones,
GMT ot UTC?
The Servlets USATime,
EuroTime and
AsiaTime
deliver the local time for the given set of USA's,
European or Asian Capitals. The servlets use several
Network Time Servers like "time-a.timefreq.bldroc.gov".
The addition reference information about USA's, European and
Asian states
see on the Yahoo Regions Directory
or on the
National Geographic Atlas. Flags of All Countries are, for
example, on the Theodora Server.
EuroTime and
AsiaTime
also deliver the European domain names.
Internet Domains information is accessible on the
Ripe Domains,
Internet Domains . Note, that the
WhoIs Services return the domain name for the given URL.
Please, don't confuse some pairs,for example,
VA (USA, Virginia)
with VA (Europa, Vatican) or FL (USA, Florida) with
FL (Europa, Finland)... There are some timesones
with 0.5-hour difference. Don't wonder. Burmese, Timphu, New Delhi, Tehran, Kathmandu
are all in these timezones, see AsiaTime.
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RedHat Explains It All....
Tens of millions, of Linux users.
Larry Ewings's Pictures.
How he drew the penguins.
Linus Torvalds's letters.
When is Linux's birthday?
Consolidation is coming.
Linux bandwagon gains on.
Richard Stallman & GNU.
It's more known as "Linux".
Popular Linux Sites.
Links, resources, FAQs, HOWTOs, etc.
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HowTo config modem Boca using the
package isapnptools of P.J.H.Fox
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Some tips for Linux users have forgot
the root passwords or can't use
it due to other problems
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