VPN(Virtual Private Network)의 소계
1.VPN(Virtual Private Network)의 정의
가상 사설망 VPN(Virtual Private Network)은 기업에게 공중망(Public Network)을 이용해 사설망과 같은 서비스를 제공하는 가상의 보안 사설망이다.
즉, 사설망과 공중망의 중간 형태로 이 둘의 단점을 해소하고 장점을 활용해 공중 통신망인 인터넷을
Networked Library), 벽이 없는 도서관(Library without Walls), 종이 없는 도서관(Paperless Library), 가상도서관(Virtual Library)등 다양하다. 이러한 동의어(또는 유의어) 가운데 '디지털도서관'이 일반적으로 사용되어 지고 있다. 즉, 많은 연구자들은 이미 도서관의 많은 수식어 가운데 '디지털'을 가장 본질적인 것으로
Early Overseas Chinese
Overall History
• Origin of overseas Chinese
• Poverty
• Southeast
• Regular occurrence
• North people’s attack
• 唐人街( Chinatown)
• Commodity economy
• Over 100,000 people
• Start to form network
• Mass migration
• Spread worldwide
• Nationa
I. Introduction: Corporation KT
KT was founded in 1981. after 1997, they reorganized their business structure from wire telephone centered structure to telecommunications and internet centered structure, and they expanded the telecommunications business. In 2002, they concentrated to construct high-speed internet. KT has building global network.
KT was the best telecommunication company in Kor
Basic information
Social Network Service:micro-blogging
One of the biggest SNS:more than 175,000,000 users
Text-based network:140-character “Tweets”
More popular with Smartphones:fast and wide spread of information
(중략)
Virtual opinion leaders
Virtual opinion leader(Eisenstein 1994)
- Charismatic celebrities or politicians who influences people highly with little s