- Node 與 Node 之間通訊 : 經過許多 LAN & WAN ( Links ) 中路由器 ( NODE ) 傳送
- 真正傳輸資料✅
- Only Link and Network layer involved at the intermediate stops during the journey✅
- encoding the data packets into a format suitable for transmission over the network ✅
- responsible for transforming the packets into a format that can be transmitted over the physical link, this process is called Encapsulation✅
功能⭐
Framing⭐
MAC Address⭐
802協定⭐⭐⭐⭐⭐
Flow control
Error
協定
硬體設備: Switches & Bridges
