- Unit VI: Data Link Control
https://drive.google.com/open?id=1al2wiHroSSx44Z3fKkIU3fzwkA6_YYhu
2. Unit VI: Data Link Control; Protocols
https://drive.google.com/open?id=1nckYcZX5IBAvB1X8O8dLlIrYvt9zn37p
3. Unit VI: HDLC
https://drive.google.com/open?id=1soGn9wzcEWVRb1h_5d2vLipwd6oxx-nu
4. Unit VI: Assignment
https://drive.google.com/open?id=1pIAf4ZBSXkNv2iXB5ZxQQN4wF3hg4HJu