[國考-電信類] 01 計算機概論-01 電腦網路 筆記(一)

第一章. Computer Networks and the Internet

1. Network Structure:

• Network edge: applications and hosts
• end systems (hosts): clients/server model, peer-peer model
• TCP/UDP service
• Network core: routers, network of networks
• circuit switching: FDMA, TDMA, end-end resources reserved for "call"
• packet switching: statistical multiplexing, store-and-forward

**用Google Slides畫圖，所以不是很精美

2. Internet Protocol Stack

	OSI Model		TCP/IP Model
	Application	應用	Application
Message	Presentation	表現
	Session	會議
Segment (end-to-end)	Transport	傳輸	Transport
Datagram (host-to-host)	Network	網路	Internet
Frame (point-to-point)	Data Link	資料鏈結	Network Access
	Physical	實體