---
tags: NTNU
title: Computer Network 計算機網路
---

# Computer Network

## Score
- Homework 30%
- Midterm 35%
- Final exam 35%

## Syllabus

### Introduction

#### The Relationship of Services to Protocol

#### Reference Model

- OSI reference model
- Principles for the seven layers
- Layers created for different abstractions
- Each layer performs well-defined function
- Function of layer chosen with definition of international standard protocols in mind
- Minimize information flow across interfaces between boundaries
- Number of layers optimum
- Physical Layer
- Deal with mechanical, electrical, timing interfaces, and physical transmission medium.
- Data link Layer
- Farming: 訊號切割和分段
- Flow control: 避免把目的記憶體灌爆
- Error control: 發生錯誤時，修正錯誤
- Medium access contorl(MAC): 避免在多點的網路通訊中資料不會互相衝突
- Network Layer
- Transport Layer
- A true end-to-end layer
- Session Layer
- Presentation Layer
- Application Layer

- TCP/IP reference model
- Link layer(Actually, an interface specification)
- in Data link layer
- DSL
- SONET
- 802.11
- Ethe
- Internet layer
- in Network layer
- IP
- ICMP
- ping
- Transport layer
- Transport layer
- TCP
- UDP
- Application layer
- in Application layer
- HTTP
- SMTP
- RTP
- DNS
- Comparision of OSI and TCP/IP
Concepts central to OSI model
- Services
- Interfaces
- Protocols
- Critique of OSI model and protocols
- Bad timing
- Bad technology
- Bad implementations
- Bad politics
- Critique of TCP/IP model

### Selected topics in the physical layer

### [Selected topics in the data link layer]()

### [The Network layer]()