protocols if necessary, similar to domain names. The registration of the ports offers
the advantage that an application can be identified according to the port number, but
only if the application uses the IANA registered port. The rest of the ports from port
number 49152 to 65535 are so called
Dynamic
and/or
Private Ports
. You find further
information on the following website:
http://www.iana.org/assignments/port-numbers
Port scan:
Port scans
are executed in order to spy out free ports on the computer.
If a computer provides a server service to others, it opens a TCP/IP or UDP port or
both or several ports. A web server has to open the port 80. A port scan finds out
which ports are opened on the computer. In order to see which ports are actually
opened on your computer you can execute a test on the following website:
http://www.port-scan.de/index2.php
IP:
In order to get connected to a computer the
Internet Protocol (IP)
identifies it with a
definite IP address. In case you send a letter to a friend you have to write the street
and the city on it. The IP address has the same function.
Host File:
Sometimes the host file is used to block known web servers by entering the local
host (127.0.0.1), so that all requests are sent to the own system. The specialty of this
method is that the blockage is valid in the whole system and is not limited to the
browser as web filters are. Furthermore you can use these filters against some
malware programs if they are trying to get commands from already known servers.
URL:
Uniform Resource Locators (URL) are a kind of Uniform Resource Identifiers (URLs).
URLs identify and locate a resource via the used network protocol (e.g. HTTP or
FTP) and the location of the resource in the computer networks.
As URLs are the first and most frequent kind of URLs the terms are often used as
synonyms.
In colloquial language URL is frequently used as a synonym for Internet addresses
like e.g
.
www.avira.com
.
Slide-Up:
A slide-up is a small window which appears slowly top right or down right on your
screen and disappears after an interaction or after some time.
- 4 -
