, . , , 20-30 %.
, , ( 155 622 /), ( , ), - ( ). , - , , , - , PNNL
- Gigabit Ethernet. - 1000 / 622 /, . , , , , , Gigabit Ethernet. , (, . .), . , , , Fast Ethernet.
, frame relay , , , .
- Internet. IP-, . IP-, SDH, IP-. UUNET - Internet (. 6.35).
. 6.35. UUNET
Distributed Networking Associates 85 % , , ( IP - 32 %).
, CBR 5 % , - 10 %. SDH, . , , .
|
|
, .
.25, frame relay, SMDS, TCP/IP. , TCP/IP, , .
TCP/IP , , . , TCP/ IP , .
. , . , .
, IP IPX. : , , , . , .
.25 . .25 , .
.25 - PAD, .
- .25 , .
frame relay , .25, , - LAP-F. , - .
frame relay . frame relay , CIR .
|
|
frame relay , , , .
frame relay , .
, frame relay.
, : CBR, , VBR, , .
- PCR, SCR, MBS, , , .
, . SONET/SDH PDH.
, - B-ISDN, ISDN.
, . , , .