Problem-Based Learning as an Effective Tool for Teaching Computer Network Design Overview: In this article we have discussed the challenges faced in teaching computer network design using problem-based learning as an effective tool. Here we have discussed where it was first introduced and the techniques used in teaching computer network design. A two-threaded approach is used to make it easier to use. Several modules have also been introduced to reduce the distance between industry and the classroom. Introduction: The MSc Data Networking and Telecommunications course was first started by the University of Salford, Salford, Greater Manchester, UK in October 1990. This course has a growing recruitment of 20 students per year in its initial start-up and gradually scaled up with a high intake of 43 full-time students during the 1999-2000 academic year. This course is introduced mainly because the use of modern computer network technology is used by most business organizations. The use of personal computers and the Internet has also increased. Network Architecture and Design: A two-threaded approach is used for effective teaching of this subject. The two threads involved are the Lecture thread and the PBL thread. In the thread of the lesson we have a theoretical understanding of the functioning and performance of the network, various topics involved in the thread of the lesson are network design principles, LAN design, multi-site networks, internet connection, management, security , sizing and understanding network applications. The lesson thread includes 20 hours of lectures and 4 hours of exercises. The total thread is graded based on the written exam 80%. The other thread is PBL (prob0lem based l...... middle of paper...... ssions. Each block has a fixed number of tokens, writes the cache block when the processor has a block token. When we compare different protocols, the token protocol is effective compared to two other protocols. The parallelized model is programmed with certain basic functions analyzed in this paper the token protocols perform better than the directory protocols multithreaded versions of the network face workload issues and cause low instruction-level parallelism Works Cited:1. csuohio.edu:2076/stamp/stamp.jsp?tp=&arnumber=60428862.S.Melvin Clearwater. Networks CNP810SP Simultaneous Multithreading (SMT) Core, http://www.zytek.com/melvin/clearwater.html,20003 A Nemirovsky, Toward Characterization of Network Processors: Needs and Challenges, XSTREAM LOGIC Inc., white paper, November. 2000