Sixth edition: what’s new?
Chapter 1:
 access nets
 ISP ecosystem
 packet switching vs.
circuit switching
Chapter 2:
 socket programming
with Python
Chapter 3:
 TCP splitting
 rdt streamlining
Chapter 4:
 router architectures
 BGP sidebars
Chapter 5:
 reorganized, streamlined
 DOCSIS cable network
case study
 data center networking
Chapter 6:
 cellular and 4G
Chapter 7:
 adaptive streaming video
 CDNs, Google
 Netflix, YouTube, Kankan
Supplementary materials
Homework problems:
 many new and revised
 improved solution manual
Powerpoint slides:
 revised and extended
 gaia.cs.umass.edu/kurose-ross-ppt-6e
Python socket labs:
 web server
 UDP pinger
 SMTP mail client
 multi-threaded web proxy
 ICMP pinger
 video streaming
Wireshark labs:
 revised and improved
Java applets:
 some improvements
Interactive HW problems:
 totally new!
 gaia.cs.umass.edu/kurose/test
Video notes:
 totally new
Socket programming: Java vs Python
Python and Java
 explicitly expose sockets
Python:
 no streams
 less house keeping
 code much shorter
 much easier to explain to programming
novices
Python:
 access to raw sockets
 ICMP pinger
Python UDP client
include socket library
from socket import *
serverName = ‘hostname’
serverPort = 12000
create UDP socket
clientSocket = socket(socket.AF_INET,
socket.SOCK_DGRAM)
get user input
message = raw_input(’Input lowercase sentence:’)
send user input to server
thru UDP socket
clientSocket.sendto(message,(serverName, serverPort))
read reply from socket
modifiedMessage, serverAddress =
clientSocket.recvfrom(2048)
print out received string
and close socket
print modifiedMessage
clientSocket.close()
Java stream jargon

input
stream
Client
Process
process
output
stream
inFromServer

A stream is a sequence of
characters that flow into or out
of a process.
An input stream is attached to
some input source for the
process, e.g., keyboard or
socket.
An output stream is attached
to an output source, e.g.,
monitor or socket.
outToServer

monitor
inFromUser
keyboard
input
stream
client
TCP
clientSocket
socket
to network
TCP
socket
from network
Java UDP client: first half
import java.io.*;
import java.net.*;
Need to talk
About OOP
Need to talk
about streams
class UDPClient {
public static void main(String args[]) throws Exception
{
BufferedReader inFromUser =
new BufferedReader(new InputStreamReader(System.in));
DatagramSocket clientSocket = new DatagramSocket();
InetAddress IPAddress = InetAddress.getByName("hostname");
Need to create
place holders
Need to do
type conversion
byte[] sendData = new byte[1024];
byte[] receiveData = new byte[1024];
String sentence = inFromUser.readLine();
sendData = sentence.getBytes();
Java UDP client: second half
DatagramPacket sendPacket =
new DatagramPacket(sendData, sendData.length, IPAddress, 9876);
clientSocket.send(sendPacket);
Place holder
DatagramPacket receivePacket =
new DatagramPacket(receiveData, receiveData.length);
clientSocket.receive(receivePacket);
String modifiedSentence =
new String(receivePacket.getData());
Additional lines
System.out.println("FROM SERVER:" + modifiedSentence);
clientSocket.close();
}
}
Chapter 4: changes
4.1 introduction
4.2 virtual circuit and
datagram networks
4.3 what’s inside a router
4.4 IP: Internet Protocol
4.5 routing algorithms
 link state, DV,
hierarchical
4.6 routing in the Internet
 RIP, OSPF, BGP
4.7 broadcast and multicast
routing
forwarding tables computed,
pushed to input ports
routing
processor
high-seed
switching
fabric
router input ports
router output ports
“match plus action”
Network Layer 4-9
Chapter 5: changes
5.1 introduction, services
5.2 error detection,
correction
5.3 multiple access
protocols
 DOCSIS case study
5.4 LANs: addressing, ARP,
Ethernet, switches,
VLANS
5.5 link virtualization: MPLS
5.6 data center networking
5.7 a day in the life of a web
request
Internet
Border router
Load
balancer
Access router
B
A
1
C
2
3
4
5
6
7
8
Link Layer 5-10
Chapter 7: Multimedia Networking
7.1 Multimedia Apps
 7.1.1 Properties of video
 7.1.2 Properties of audio
 7.1.3 Types of apps
 Streaming stored video
 Conversational VoIP
 Streaming live video
7.2 Streaming video
 7.2.1 UDP streaming
 7.2.2 HTTP streaming
 Simple fluid analysis

7.2.3 Adaptive streaming
& DASH
7.2.4 CDNs
 Enter deep; Bring home
 DNS: intercept requests
 Server selection strategies
 Geographically closest,
real-time measurements, IP
anycast
7.2.5 Case Studies
 Google, Netflix, YouTube,
Kankan
7.3& 7.4 VoIP
 Skype expanded
7.5 Network support
 Streamlined
Netflix case study
Netflix registration
and payment servers
Amazon Cloud: movie
ingestion, version creation,
CDN upload, manifest file
distribution, and Web pages
Upload versions
to CDNs
CDNs
Manifest
file
Registration
and payment
Video chunks
(DASH)
Client
Interactive end-of-chapter exercises

need: large set of problems/exercises that
 students can solve (and obtain answers)
 professors can generate (with solutions) for quizzes, tests

many important exercises lend have structure that
allow many variations of exercise to be generated:








Quantitative comparison of packet switching and circuit wwitching
End-to-end delay
Internet checksum
TCP RTT and timeout
TCP congestion window evolution
Dijkstra's Link State algorithm
Link Layer (and network layer) addressing, forwarding
check out: http://gaia.cs.umass.edu/kurose/test
Interactive end-of-chapter exercises
Interactive end-of-chapter exercises
Video Notes
VideoNotes: selected pre-recorded on-line
video/audio/ppt (e.g., Camtasia) segments:
 walkthrough, discussion of selected topics (e.g., BGP
basics, a day day in the life of an HTTP request)
 walking through, solving sample problems
 demonstrations (e.g., traceroute, Wireshark)