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Glossary

P

PNG:

 Abbreviation for Portable Network Graphics, a freely available grid 

graphics format for loss-free compression.

Port:

 A port is part of a network address (or also IP address). It allows 

assignment of data packages to various services which are running on 
one device under the same network address.

PSK:

 Stands in connection with WLAN encoding for Pre-Shared Key. 

Clients, who want to connect up to a wireless network secured with 
PSK have to know this key.

R

Router:

 Device for connecting up several networks, e.g. home network 

and internet.

S

Switch:

 Device for connecting several computers to a network.

U

UPnP AV:

 Abbreviation for Universal Plug and Play Audio / Video. Is used 

to control network devices from all manufacturers. Has become a wide 
spread standard for home networking.

W

WEP:

 Abbreviation for Wired Equivalent Privacy. Former standard process 

in the WLAN encryption, now outdated.

Wired network:

 see LAN.

Wireless network:

 see WLAN.

WLAN:

 Abbreviation for Wireless Local Area Network. Also abbreviated 

as wireless network.

WMA:

 Abbreviation for Windows Media Audio, Microsoft own audio data 

format. As with MP3 files, the content is compressed here as well.

WMV:

 Abbreviation for Windows Media Video, Microsoft own video 

data format.

WPA:

 Abbreviation for Wi-Fi Protected Access. Replaced WEP as standard 

encryption for wireless networks.

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