Which of the following protocols was developed in the mid197

Which of the following protocols was developed in the mid-1970s for use in Systems Network Architecture (SNA) environments?

A. SDLC

B. ISDN

C. LAP-B

D. X.25

Solution

answer is  A. SDLC

SNA protocol suit contains

THDR

SDLC is Synchronous Data Link Control used for data transfer on single link which constains error correction and detection codes for retransmission and pumping the data.