• 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

**分為上下兩層** ⭐

硬體設備: Switches & Bridges