Which of the following protocols operates at the session layer (layer 5)?
Remotre Procedure Call (RPC) is the only of the above choices to operate at the session layer (layer 5).
All of the other answers were wrong.
LPD operates at layer 7
SPX operates at layer 4
IGMP operates at layer 3.
WALLHOFF, John, CBK#2 Telecommunications and Network Security (CISSP Study Guide), April 2002 (page 1).
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