Interface – electronic socket, plug, cable.
LPT – port for transmitting information in 1 direction, as a result of the development of both direction of data transmission. Parallel bus 12 BIT.
Setting in BIOS:
EPP – works better under Linux
ECP – works better under Windows
IEEE1394 / Fire Wire:
• does not allow the creation of loops
• only 1 device per 1 cable
• quick action is to set on one cable transmitting and on the other receiving.
• Has 2 cables for 2 pairs: signal, power
• competition for USB
USB (Universal Serial Bus):
- acceptable structure of the tree in which you can connect the Hub.
• LS has CRC checksums
• FS has no CRC checksums (it is faster)
Electronics in Hub 2. 0 must have buffer for communication 1. 1 and 2. 0.
The structure should be built on version 2. 0.
Wireless I / O interfaces:
• IRDA
• Wi-Fi
• Bluetooth
IRDA – infrared data association
Standards:
• SIR – IR standard 115 kbs/s
• VFIR – very fast IR 16 Mb/s
• FIR fast IR 4 Mb/s
Wi-Fi:
• frequency range 2400-24833 MHz
• Wi-Fi waves are microwaves
• GPS works on microwaves
• trees make it difficult to move microwaves
• microwaves are harmful! Frequency changes have been extended to reduce harm.
• Smog hinders data transfer
Standards:
• A
• B
• C
• D
• E
• H to 5 GHz
• I
Compatible Standards:
• B/G
• G/I
Descriptions of standards:
H – fairly fast and encrypted with authentication.
Bluetooth:
• Works at 2. 4-2. 6 GHz
• transmission power reduced to 10m range
• version 2 with extended antenna giving a range of up to 100m
• for a very long time transmission available only unencrypted, in the new version already secured.