Axis Q1755 Bedienungsanleitung PDF herunterladen (Seite 51)

AXIS Q1755 - Glossary of Terms

network, via e.g. a direct phone line or via the Internet.

VOP (Video Object Plane) - A VOP is an image frame in an

H.264

video stream. There are several types of VOP:

- An I-VOP is complete image frame.

- A P-VOP codes the differences between images, as long

as i

t is more efficient to do so. Otherwise it codes the whole

image, which may also be a completely new image.

WAN (Wide-Area-Network) - Similar to a LAN, but on a

large

r geographical scale.

W-LAN (Wireless LAN) - A wireless LAN is a wireless local

area

network that uses radio waves as its carrier: where the

network connections for end-users are wireless. The main

network structure usually uses cables.

Web server - A web server is a program, which allows

b browsers to retrieve files from computers connected to

the Internet. The web server listens for requests from web

browsers and upon receiving a request for a file sends it

back to the browser.

The primary function of a web server is to serve pages to

other remote

computers; consequently, it needs to be

installed on a computer that is permanently connected to

the Internet. It also controls access to the server whilst

monitoring and logging server access statistics.

WEP (Wireless Equivalent Privacy) - A wireless security

protoc

ol, specified in the IEEE 802.11 standard, which is

designed to provide a wireless local area network (WLAN)

with a level of security and privacy comparable to that

usually expected of a wired LAN. Security is at two

different levels; 40-bit and 128-bit encryption. The higher

the bit number, the more secure the encryption.

WPA-PSK (Wi-Fi Protected Access - Pre-Shared Key) -

This wireless encryption method uses a pre-shared key

(PSK) for ke

y management. Keys can usually be entered as

manual hex values, as hexadecimal characters, or as a

Passphrase. WPA-PSK provides a greater degree of security

than WEP.

YPbPr - analog video signal for component video.

Zoom lens - A zoom lens can be moved (zoomed) to

enla

rge the view of an object to show more detail.

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