AI Summary
[DOCUMENT_TYPE: user_assignment]
**What This Document Is**
This is a lab assignment for Introduction to Computer Networks (CSE 473S) at Washington University in St. Louis. It focuses on foundational networking concepts, specifically the design and implementation of a datalink layer within a layered network architecture. The assignment requires students to engage with a network simulator to build and test their implementation. It’s a practical exercise designed to reinforce theoretical understanding of how network layers interact.
**Why This Document Matters**
This assignment is crucial for students learning the fundamentals of computer networking. It’s particularly beneficial for those aiming to solidify their understanding of layered protocols, data encapsulation, and inter-layer communication. Students enrolled in CSE 473S will need to complete this lab to demonstrate their grasp of core networking principles. It’s best used *during* the lab period and for focused study on datalink layer concepts, serving as a guide for hands-on implementation and experimentation.
**Common Limitations or Challenges**
This document outlines the requirements and framework for the lab, but it does *not* provide pre-written code or step-by-step solutions. Students are expected to independently design, implement, and debug their datalink layer. The assignment assumes a basic understanding of C programming and network concepts covered in the course lectures. It also doesn’t cover advanced error handling or optimization techniques – the focus is on core functionality.
**What This Document Provides**
* A detailed explanation of the layered network architecture used in the lab.
* Definitions of the Protocol Data Units (PDUs) used for communication between layers (A_PDU, D_PDU, PH_PDU).
* An overview of service primitives used for inter-layer communication (PH_DATA, DLC_DATA).
* Specific function outlines (DatalinkToPhysical, DatalinkToApplication) that students will need to implement.
* Information on required files and resources available for download (pdu.h, dlc layer.c).