1
© 2 0 0 1, C is c o S y s te m s , In c . A ll rig h ts re s e rv e d .
S e c u rity B o o tc a m p
CS P F A 2 .1 — 6 -1
Ch a p te r 6
Cis c o P IX F ire w a ll T ra n s la tio n s
222
© 2 0 0 1, C is c o S y s te m s , In c . A ll rig h ts re s e rv e d .
S e c u rity B o o tc a m p
O b je c tiv e s
U p o n c o m p le tio n o f th is c h a p te r, y o u w ill b e a b le
to p e rfo rm th e fo llo w in g ta s k s :
•D e s c rib e h o w th e T CP a n d U D P p ro to c o ls fu n c tio n w ith in
th e P IX F ire w a ll.
•D e s c rib e h o w s ta tic a n d d y n a m ic tra n s la tio n s fu n c tio n .
•Co n fig u re in b o u n d a n d o u tb o u n d a c c e s s th ro u g h th e P IX
F ire w a ll.
•T e s t a n d v e rify c o rre c t P IX F ire w a ll o p e ra tio n .
3
© 2 0 0 1, C is c o S y s te m s , In c . A ll rig h ts re s e rv e d .
S e c u rity B o o tc a m p
CS P F A 2 .1 — 6 -3
T ra n s p o rt P ro to c o ls
444
© 2 0 0 1, C is c o S y s te m s , In c . A ll rig h ts re s e rv e d .
S e c u rity B o o tc a m p
S e s s io n s in a n IP W o rld
In a n IP w o rld , a n e tw o rk s e s s io n is a
tra n s a c tio n b e tw e e n tw o e n d s y s te m s .
It is c a rrie d o u t o v e r tw o tra n s p o rt la y e r
p ro to c o ls :
•T CP (T ra n s m is s io n Co n tro l P ro to c o l)
•U D P (U s e r D a ta g r a m P ro to c o l)
555
© 2 0 0 1, C is c o S y s te m s , In c . A ll rig h ts re s e rv e d .
S e c u rity B o o tc a m p
T CP
•T CP is a c o n n e c tio n -o rie n te d ,
re lia b le -d e liv e r y , ro b u s t, a n d h ig h p e rfo rm a n c e
tra n s p o rt la y e r p ro to c o l.
•T CP fe a tu re s
S e q u e n c in g a n d a c k n o w le d g e m e n t o f d a ta
A d e fin e d s ta te m a c h in e (o p e n c o n n e c tio n ,
d a ta flo w , re tra n s m it, c lo s e c o n n e c tio n )
Co n g e s tio n m a n a g e m e n t a n d a v o id a n c e
m e c h a n is m s
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