N , ,
N
N , .
N , , , FDDI, Fast Ethernet, Gigabit Ethernet
(, )
( .) Ethernet Token ring
(MLT3, B8ZS, HDB3 .) Fast Ethernet, Gigabit Ethernet, FDDI, ISDN, xDSL .
5. : MAC LLC
: MAC LLC
LLC
( )
:
IEEE 802 (Ethernet, Token ring .)
FDDI
HDLC
:
/ /
:
LLC1 ,
LLC2 ,
LLC3 ,
MAC
(PDU) LLC MAC
:
MAC ( PDU LLC )
MAC (Ethernet, Token ring .)
6. CSMA/CD
CSMA/CD (Carrier sense multiple access with collision detection)
:
( )
|
|
,
- .
7. Ethernet
Ethernet (, . ether )
.
Ethernet
,
OSI.
8. Token Ring FDDI
Token Ring
(token ring)
4 /
16 / ( )
100 / (HSTR high speed token ring)
:
(STP)
(UTP)
/