4학년 1학기 전공/풀스택서비스네트워킹
                
              [풀스택서비스네트워킹] Chapter 1. OSI Architecture(Overall)
                시데브
                 2025. 3. 7. 12:22
              
              
            
            경희대학교 이성원 교수님의 풀스택 서비스 네트워킹 수업을 기반으로 정리한 글입니다.
Computer Network
What is Computer?
컴퓨터는 computer programming을 통해서 자동적으로 수학적 혹은 논리적 operations를 수행하는 sequences를 실행할 수 있는 device
ex) Desktop Computer, Server Computer, Tablet Computer, Smart Phones, Smart Watches, Wearable Computers, IoT & Sensor Devices, Comsumer Electronics, Vehicles, More and More
What is Computer Network?
컴퓨터 네트워크는 network nodes에 위치한(혹은 제공하는) 자원을 공유하는 computers의 모임
Categories of Networks

- Local Area Network
- LAN: usually privately owned and links the devices in a single office, building or campus
 

- Metropolitan Area Network
- MAN: designed to extend over an entire city
 

- Wide Area Network
- WAN: a telecommunications network that extends over a large geographic area
 - 보통 전용선(Leased Line)과 함께 구성
 

OSI 7 Layer
- OSI(Open System Interconnection) model: 통신 기기 혹은 통신의 internal structure and technology과 관계 없이 communication functions를 표준화 혹은 특성화하는 개념적 모델
 - 다양한 communication systems가 표준 protocols에서 통신 가능하도록 communication system을 7개의 추상적 layers로 분할
- Application(Layer 7)
 - Presentation(Layer 6)
 - Session(Layer 5)
 - Transport(Layer 4)
 - Network(Layer 3)
 - Datalink(Layer 2)
 - Physical(Layer 1)
 
 
참고자료
Wide area network - Wikipedia
From Wikipedia, the free encyclopedia Computer network that connects devices across a large distance and area A local area network (LAN) with connection to a wide area network (WAN) A wide area network (WAN) is a telecommunications network that extends ove
en.wikipedia.org
Computer network - Wikipedia
From Wikipedia, the free encyclopedia Network that allows computers to share resources and communicate with each other A computer network is a set of computers sharing resources located on or provided by network nodes. Computers use common communication pr
en.wikipedia.org
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