Information Technology Reference
In-Depth Information
IP (Internet Protocol) Address:. The. numeric. address. that.
guides.all.Internet.trafic,.such.as.e-mail.and.Web.trafic,.
to.its.destination..The.IP.address.is.“under.the.hood”.
and.is.derived.from.its.domain.name,.which.is.mapped.
to.the.IP.Address.through.the.Domain.Name.Service.
Kernal (Kernel):. The. central. module. of. an. operating. sys-
tem..It.is.the.part.of.the.operating.system.that.loads.
irst,.and.it.remains.in.main.memory..Because.it.stays.
in.memory,.it.is.important.for.the.kernel.to.be.as.small.
as. possible. while. still. providing. all. the. essential. ser-
vices.required.by.other.parts.of.the.operating.system.
and. applications.. Typically,. the. kernel. is. responsible.
for.memory.management,.process.and.task.manage-
ment,.and.disk.management.
Legacy/Heritage System:. A.hardware.and.software.system.
that. uses. technologies. that. are. “old”. in. comparison.
with.today's.technology..Typically,.legacy.systems.use.
character.terminals. (although.many. have.been.made.
to.look.smarter.by.enabling.access.through.a.graphical.
user.interface),.and.process.data.through.a.proprietary.
database,.and.so.forth.
Live/Production:. When. a. system. is. “in. production”. or. is.
said.to.be.“live,”.it.means.that.it.is.being.used.to.pro-
cess.active.work.or.transactions,.and.it.is.no.longer.in.
test. mode.. Organizations. should. always. differentiate.
between. and. separate. systems. that. are. being. evalu-
ated,.tested,.or.developed.from.those.which.are.“live.”
Local Area Network (LAN):. A. home. or. ofice. network.
operated.within.one.location..This.may.include.one.or.
more.adjacent.buildings,.but.a.local.network.will.nor-
mally.be.connected.by.ixed.cables.or,.more.recently,.
short-range. radio. equipment.. A. LAN. will. not. use.
modems. or. telephone. lines. for. internal. communica-
tions,.although.it.may.include.such.equipment.to.allow.
selected.users.to.connect.to.the.external.environment.
Logging:. The. process. of. recording. events. at. the. time. that.
they.occur.
