000
00303nam a2200109Ia 4500
008
230621s9999 xx 000 0 und d
020
_a
9788131769058
100
_a
William Stallings
_9
1632
245
0
_a
Network Security Essentials : Applications and Standards
260
_b
Pearson Education
942
_c
MCA
999
_c
9274
_d
9274