Siemens EF 711 Series Betriebsanweisung PDF herunterladen (Seite 471)

SCALANCE WLC711

User Guide, V8.11, 07/2012, C79000-G8976-C260-03 A-1

Glossary

Networking Terms and Abbreviations

For information about... Refer to page...

Networking Terms and Abbreviations A-1

Wireless Controller Terms and Abbreviations A-15

Table A-1 Networking Terms and Abbreviations

Term Explanation

AAA Authentication, Authorization and Accounting. A system in IP-based networking to control

what computer resources users have access to and to keep track of the activity of users over

a network.

Access Point (AP) A wireless LAN transceiver or ‘base station’ that can connect a wired LAN to one or many

wireless devices.

Ad-hoc mode An 802.11 networking framework in which devices or stations communicate directly with

each other, without the use of an access point (AP). (Compare Infrastructure Mode)

AES Advanced Encryption Standard (AES) is an algorithm for encryption that works at multiple

network layers simultaneously. As a block cipher, AES encrypts data in fixed-size blocks of

128 bits. AES was created by the National Institute of Standards and Technology (NIST).

AES is a privacy transform for IPSec and Internet Key Exchange (IKE). AES has a variable

key length - the algorithm can specify a 128-bit key (the default), a 192-bit key, or a 256-bit

key.

For the WPA2/802.11i implementation of AES, a 128 bit key length is used. AES encryption

includes 4 stages that make up one round. Each round is then iterated 10, 12 or 14 times

depending upon the bit-key size. For the WPA2/802.11i implementation of AES, each round

is iterated 10 times.

AES-CCMP AES uses the Counter-Mode/CBC-MAC Protocol (CCMP). CCM is a new mode of operation

for a block cipher that enables a single key to be used for both encryption and

authentication. The two underlying modes employed in CCM include Counter mode (CTR)

that achieves data encryption and Cipher Block Chaining Message Authentication Code

(CBC-MAC) to provide data integrity.

ARP Address Resolution Protocol. A protocol used to obtain the physical addresses (such as

MAC addresses) of hardware units in a network environment. A host obtains such a physical

address by broadcasting an ARP request, which contains the IP address of the target

hardware unit. If the request finds a unit with that IP address, the unit replies with its physical

hardware address.

Association A connection between a wireless device and an Access Point.

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