IBM SNA, X.25 ¼ºñ½º ÃâÇö
1°³ÀÇ È£½ºÆ®¿¡ ¿©·¯°³ÀÇ ´Ü¸»±â°¡ Á¢¼Ó
Àú¼Ó Åë½Å, Åë½Å½Ã ¿¡·¯Á¡°Ë/¿¡·¯Ã³¸®°¡ Áß¿ä½ÃµÊ
1970s-1980s
LANÀ» È°¿ëÇÏ¿© printer, disk µî °øÀ¯
Ethernet, Token Ring
LAN°£ÀÇ ¿¬°áÀº email, file transferµîÀ» °¡´ÉÇÏ¿© ÇÏ¿´À¸¸ç, »ý»ê¼º ¹× °æÀï·ÂÀ»
Áõ´ë ½ÃÅ´
ºÐ»êó¸® ÃâÇö : DEC VAX, DECnet
1980s-1990s
°ú°ÅÀÇ ±â¼ú°ú ½Å±â¼ú°£ÀÇ È¥Àç
LAN, low speed PDN, Leased Line, high speed PDN
Áß¾ÓÁýÁßÇüÅ Application -> ºÐ»êó¸® Application ¿ä±¸ Áõ´ë
³×Æ®¿÷ÀÇ flexibility, scalability, adaptability Á߿伺 Áõ´ë
LAN to LAN via WAN and Leased Line
FDDI, TCP/IP
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