Question: just desrcibe type answer i need. Key points: Data Link Layer with point to point channel; PPP protocol; broadcast channel in DLL layer Questions: 1.

just desrcibe type answer i need. Key points: Data Link Layer

just desrcibe type answer i need.

Key points: Data Link Layer with point to point channel; PPP protocol; broadcast channel in DLL layer Questions: 1. the difference of two channel types in DLL. 2. What is the transmission unit of data between two nodes in the Data link layer? 3. what are the 3 main problems of the point to point channel in Data link layer? 4. how can we solve the framing problem in the point to point channel

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