hnd has asked for the wisdom of the Perl Monks concerning the following question:

am new (not so new) to perl and am bit confused in m// operator Q1.if we use ? as the delimiter then what does that signify? Q2.we use the . operator with /s to match new lines, can you give me an example?????? can we manupilate the tcp packets i.e. how can we change the values of various falgs in the tcp packet