[ns] in 802.11, ShortRetryLimit_ and LongRetryLimit_ "0" is same effect on simulation result as "1"?

is 0 or 1, it can't try to retransmission more, right? Is it normal results(IEEE 802.11 standard)? or not? (ns-2 implementation problem?) please help me! sincerely, Sangho Lee

[ns] RTR CBK drop at AP in wirelessLAN

u/pipermail/ns-users/2004-June/042734.html) I need your comments or explanation. Thanks in advance. sincerely, sangho lee