107
-
Class A - supports 16 million hosts on each of 126 networks
Class B - supports 65,000 hosts on each of 16,000 networks
Class C - supports 254 hosts on each of 2 million networks
The number of unassigned Internet addresses is running out, so a new classless scheme called CIDR is gradually
replacing the system based on classes A, B, and C and is tied to adoption of IPv6.
IRQ
Interrupt Request. An acronym for the hardware signal to the CPU that an external event has occurred which needs
to be processed.
KB
Kilobyte. One thousand bytes.
LCD
Liquid Crystal Display. A type of display which makes images by controlling the orientation of crystals in a crystalline
liquid.
MAC Address
Media Access Control Address. A unique physical address of a network card. For Ethernet, the first three bytes are used
as the vendor code, controlled and assigned by IEEE. The remaining three bytes are controlled by each vendor
(preventing overlap), therefore, every Ethernet card is given a unique physical address in the world, being assigned
with a different address from other cards. For Ethernet, frames are sent and received based on this address.
MB
Megabyte. One million bytes.
Megahertz
1,000,000 cycles per second.
Memory
A repository for data and applications which is readily accessible to your LIFEBOOK Ultrabook’s CPU.