Question

If you are looking at the OSI model Protocol Stack, what layer is the only layer with both a header and trailer?

Answer 1

Answer: Data-link layer

Step-by-step explanation:Data link layer is the second layer of the OSI(Open system interconnection) that functions by managing the movement of the data/information into physical link. This layer encapsulates both header and trailer.

Header is the part of data link layer that has the purpose of having control data and its activities which are added at the start of PDU(protocol data unit) like addressing .Trailer is the part that serves as containing the information of control which gets attached at the bottom part of the PDU