Computer Communication Networks

CSEN5323 Computer Communication Networks

• Computer  Networks and the Internet

What is the Internet?

Network edge: end systems, access networks, links

 Network core: packet switching, circuit switching, network structure

 Delay, loss, throughput in networks

 Protocol layers, service models

 Networks under attack: security

 History

• Application Layer

Principles of network applications

Web & HTTP

FTP 

Electronic mail: SMTP, POP3, IMAP

DNS

P2P applications

Socket Programming

• Transport Layer

Transport-layer services, Multiplexing and Demultiplexing

UDP

Principles of reliable data transfer

TCP

Principles of congestion control ,  TCP congestion control

• Network Layer

Introduction, Virtual circuit and datagram networks ,

What’s inside a router

IP: Internet Protocol

Routing algorithms

• Link Layer

Introduction, services, Error detection, correction

Multiple access protocols

LANs  (addressing, ARP, Ethernet, switches)

data center networking,

a day in the life of a web request

• Wireless and Mobile Networks

Introduction

Wireless  

Wireless links, characteristics

IEEE 802.11 wireless LANs ("Wi-Fi")

Cellular Internet Access