Information Technology Reference
In-Depth Information
Command Line:. The.blinking.cursor.that,.prior.to.the.use.of.
Microsoft.Windows,.was.at.the.heart.of.all.operating.
systems.. In. the. world. of. mini. computers. and. UNIX,.
the.command.line.is.often.called.the.“$”.prompt.and.
signiies. that. the. operating. system. is. able. to. accept.
another.command.(e.g.,.to.“mount”.a.new.disk-pack.
or.to.format.a.disk).
. . People. familiar. with. the. Microsoft. DOS. environ-
ment.will.recall.the.“C”.prompt,.being.the.command.
line. familiar. to. all. PC. users. as. C:\. (with. optional.
parameters.to.include.the.current.path).
Communications Network:. A. system. of. communications.
equipment. and. communication. links. (by. line,. radio,.
satellite,. etc.),. which. enables. computers. to. be. sepa-
rated. geographically,. while. still. be. “connected”. to.
each.other.
Computer System:. One. or. more. computers,. with. associ-
ated.peripheral.hardware,.with.one.or.more.operating.
systems,.running.one.or.more.application.programs,.
designed.to.provide.a.service.to.users.
Computer Viruses:. Pieces.of.programming.code.that.were.
purposely.written.to.inlict.an.unexpected.result.upon.
an. innocent. victim.. There. are. now. approximately.
50,000. viruses. and. their. variants. for. which. known.
cures.or.“vaccines”.are.available.
.
. Viruses. are. transmitted. within. other. (seemingly).
legitimate.iles.or.programs,.the.opening,.or.execution.
of.which,.causes.the.virus.to.run.and.to.replicate.itself.
within. your. computer. system,. as. well. as. performing.
some. sort. of. action.. Such. actions. can. be. as. harm-
less.as.causing.characters.to.“fall.off”.the.screen.(early.
DOS-based.virus.in.the.1980s),.to.the.most.malicious.
viruses.that.destroy.data.iles.and.replicate.themselves.
to.everyone.in.your.e-mail.directory.
.
. It. is. essential. to. guard. against. virus. attacks. by. a.
combination. of. guarded. awareness. together. with. a.
modern.antivirus.package.and.regular.updates.
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