網路通訊

Wired

Wireless

VoWiFi(voice over Wi-Fi)/Wi-Fi calling

PDN = IP network ??

OSI 7 layers

TCP/IP

4 layers update to 5 layers
OSI 7 layers vs TCP/IP 5 layers
訂便當的網路分層
回傳_狀態表
訂便當過程
對應TCP/IP 4 layers
three-way handshake
data transmit
out of order packets

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