Error

Fault or mistake,either in the softwere or ont he part of the user that causes a program to stop running (crash)or produce unexepted results .Program errors or bugs are largely elliminated in the course of the programmers intial testing procedure,but some will remain in most programs .All computer operating systems re designed to produce an rror message (on the display screens or in an error file of printout whenever an error is detected reporting that an error has taken place and wherever possible diagnosing its cause.
Errors can be catagerised in to several types.Syntax errors are caused by the incorreect use of the programming language.Logical errors are faults in the progrmm design .Esecution error or run time errors are caused by combinations of data that the programmer did not anticipate .A typical exeecution error is cause by attempting to devide a number by zero.Computers are designed to deal with a set range of numbers to a given range of accuracy ,Many errors are caused byb ther=se limitations;an over flow error occures when a number is too large for the computer deak with,an underflow error occurs when anumber is too small;rounding errors an truncation errors are caused by the need to round off decimal numbers.or to cut them off(truncate them)after the maximmum number of decmal places allowed by the computers level of accurancy.
Ethernet:protocol for local area network .Ethernet was devoloped prinipally b the Xeros corporation but can now be used on many computers.It allows data transfer at rates up to 10 Mbps.