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SYDev
[풀스택서비스네트워킹] Chapter 1. OSI Architecture(Overall) 본문
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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