University Assignment: Communication Networks Solution - ELEC345

This assignment solution covers various aspects of communication networks, starting with an explanation of Cyclic Redundancy Checks (CRC) and their application in Ethernet frames for error detection. It then discusses the role of bridges in increasing network throughput and the function of hubs in connecting devices. The solution delves into Virtual Local Area Networks (VLANs), explaining their purpose, configuration using IEEE802.1Q protocol, and traffic isolation mechanisms. It analyzes the Multi-Level Transmit 3 (MLT-3) line coding scheme and compares it with Manchester encoding, highlighting the impact of signal impairments like Near End Crosstalk and signal echo. The solution also covers the backoff exponential process in CSMA/CD, the efficiency of slotted Aloha, and the relationship between cable length and throughput. Furthermore, it examines time slot switching and the framing bits used for synchronization, and provides an overview of E1 frames and SONET overheads. Finally, the solution touches upon Snell's Law of refraction and its application in optics.