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a) There are Q nodes (the source host and the 1Q routers). Let q proc d denote the processing delay at the q th node. Let q R be the transmission rate of the q th link and let Problem […]

Computer Networking: A Top-Down Approach, 6th Edition Solutions to Review Questions and Problems Version Date: May 2012 This document contains the solutions to review questions and problems for the 5th edition of Computer Networking: A Top-Down Approach by Jim Kurose […]

Chapter 3 Review Questions 1. a) Call this protocol Simple Transport Protocol (STP). At the sender side, STP accepts from the sending process a chunk of data not exceeding 1196 bytes, a destination host address, and a destination port number. […]

thus be big enough to accommodate 2w sequence numbers. That is, the sequence number space must be at least twice as large as the window size, wk 2t . Problem 24 3. At 4t the sender receives the ACKs that […]

Chapter 4 Review Questions 1. A network-layer packet is a datagram. A router forwards a packet based on the 2. Datagram-based network layer: forwarding; routing. Additional function of VC-based network layer: call setup. 3. Forwarding is about moving a packet […]

Problem 26 Step N’ D(t),p(t) D(u),p(u) D(v),p(v) D(w),p(w) D(y),p(y) D(z),p(z) 0 x ∞ ∞ 3,x 6,x 6,x 8,x 1 xv 7,v 6,v 3,x 6,x 6,x 8,x 2 xvu 7,v 6,v 3,x 6,x 6,x 8,x 3 xvuw 7,v 6,v 3,x 6,x […]

Chapter 5 Review Questions 1. The transportation mode, e.g., car, bus, train, car. 2. Although each link guarantees that an IP datagram sent over the link will be received at the other end of the link without errors, it is […]

Chapter 6 Review Questions 1. In infrastructure mode of operation, each wireless host is connected to the larger network via a base station (access point). If not operating in infrastructure mode, a 2. a) Single hop, infrastructure-based b) Single hop, […]

Chapter 7 Review Questions 1. Bit rate mins Facebook Frank 40 kbps 20 Mbytes Martha Music 200 kbps 100 Mbytes Victor Video 4 Mbps 2 Gbytes Bytes transferred in 67 2. Spatial Redundancy: It is the redundancy within a given […]

Chapter 8 Review Questions 1. Confidentiality is the property that the original plaintext message can not be determined by an attacker who intercepts the ciphertext-encryption of the original plaintext message. Message integrity is the property that the receiver can detect […]

Chapter 9 Review Questions 1. A network manager would like to have network management capabilities when (a) a component of the network fails, (b) a component of the network is about to fail, and is 2. Performance management, fault management, […]

import java.net.* ; import java.util.* ; final class HttpRequest implements Runnable { final static String CRLF = “\r\n”; Socket socket; // Constructor public HttpRequest(Socket socket) throws Exception { this.socket = socket; } // Implement the run() method of the Runnable […]

Solutions for Mail User Agent: Simplified Version import java.io.*; import java.net.*; public class EmailSender { public static void main(String[] args) throws Exception { throw new Exception(“220 reply not received from server.”); } // Get a reference to the socket’s output […]

Solutions for Programming Assignment 7 Below are the solutions for the RTSP/RTP lab. There are two classes: Client, RTPpacket. Client.java import java.io.*; JButton setupButton = new JButton(“Setup”); JButton playButton = new JButton(“Play”); JButton pauseButton = new JButton(“Pause”); JButton tearButton = […]

RTPpacket.java //class RTPpacket public class RTPpacket{ //size of the RTP header: static int HEADER_SIZE = 12; //Bitstream of the RTP header public byte[] header; //size of the RTP payload public int payload_size; //Bitstream of the RTP payload public byte[] payload; […]

Solution for the Mail Client Lab SMTPConnection.java import java.net.*; import java.io.*; import java.util.*; /* $Id: SMTPConnection.java,v 1.1.1.1 2003/09/30 14:36:01 kangasha Exp $ */ /** * Open an SMTP connection to a remote machine and send one mail. * * @author […]

Solution for the UDP Lab The following code presents one solution for the UDP lab. It contains code for the UDPClient.java and UDPPinger.java classes. The other classes do not require modifications in the basic lab. UDPClient.java /** /** How many […]

Solution for the Proxy Cache Lab The following is one solution for the proxy cache lab. It contains code for all the three classes in the lab. ProxyCache.java /** * ProxyCache.java – Simple caching proxy * public static void init(int […]

These two messages concern themselves with the Diffie-Hellman key exchange. Each host independently computes and exponent and a nonce which is then sent to the other host. This is done one after the other in messages 3 and 4. Once […]

IPSEC LAB Part 1:IPSec connection with Manual Keying in the same subnet (Transport mode) The goal of this part of the lab is to establish an IPSec connection between M1(192.168.100.2) and M3 (192.168.101.2) within the same (inner) subnet. The topology […]

Wireshark Lab: NAT SOLUTION Supplement to Computer Networking: A Top-Down Approach, 6th ed., J.F. Kurose and K.W. Ross © 2005–21012, J.F Kurose and K.W. Ross, All Rights Reserved In this lab, we’ll investigate the behavior of the NAT protocol. This […]

1 Wireshark Lab: TCP SOLUTION Supplement to Computer Networking: A Top-Down Approach, 6th ed., J.F. Kurose and K.W. Ross © 2005–21012, J.F Kurose and K.W. Ross, All Rights Reserved The answers below are based on the trace file tcp-ethereal-trace-1 in […]

Wireshark Lab: HTTP SOLUTION Supplement to Computer Networking: A Top-Down Approach, 6th ed., J.F. Kurose and K.W. Ross © 2005–21012, J.F Kurose and K.W. Ross, All Rights Reserved The following screen shots showing the HTTP GET and HTTP reply answer […]

Wireshark Lab: Ethernet & ARP SOLUTION Supplement to Computer Networking: A Top-Down Approach, 6th ed., J.F. Kurose and K.W. Ross © 2005–21012, J.F Kurose and K.W. Ross, All Rights Reserved The solutions below are based on the trace file ethernet–ethereal-trace-1 […]

Wireshark Lab: Getting Started SOLUTION Supplement to Computer Networking: A Top-Down Approach, 6th ed., J.F. Kurose and K.W. Ross © 2005–21012, J.F Kurose and K.W. Ross, All Rights Reserved Q1. List the 3 different protocols that appear in the protocol […]

Wireshark Lab: DHCP SOLUTION Supplement to Computer Networking: A Top-Down Approach, 6th ed., J.F. Kurose and K.W. Ross © 2005–21012, J.F Kurose and K.W. Ross, All Rights Reserved Here is a screen shot of the Command Prompt window similar to […]

© 2005-21012, J.F Kurose and K.W. Ross, All Rights Reserved Wireshark Lab: 802.11 v6.0 Supplement to Computer Networking: A Top-Down Approach, 6th ed., J.F. Kurose and K.W. Ross “Tell me and I forget. Show me and I remember. Involve me […]

Wireshark Lab: DNS SOLUTION Supplement)to)Computer)Networking:)A)Top3Down) Approach,)6th)ed.,)J.F.)Kurose)and)K.W.)Ross) ) ©)2005921012,)J.F)Kurose)and)K.W.)Ross,)All)Rights)Reserved) ) ) ) 1. Run nslookup to obtain the IP address of a Web server in Asia. What is its IP address? ANSWER: I performed nslookup for www.rediff.com. Its IP address is […]

Wireshark Lab: SSL v6.0 Supplement to Computer Networking: A Top–Down Approach, © 2005–21012, J.F Kurose and K.W. Ross, All Rights Reserved 6th ed., J.F. Kurose and K.W. Ross “Tell me and I forget. Show me and I remember. Involve me […]

Wireshark Lab: IP SOLUTION Supplement)to)Computer)Networking:)A)Top3Down) Approach,)6th)ed.,)J.F.)Kurose)and)K.W.)Ross) ) ©)2005921012,)J.F)Kurose)and)K.W.)Ross,)All)Rights)Reserved) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) […]

Wireshark Lab: UDP SOLUTION Supplement to Computer Networking: A Top-Down Approach, 6th ed., J.F. Kurose and K.W. Ross © 2005–21012, J.F Kurose and K.W. Ross, All Rights Reserved The answers below are based on the trace file http-ethereal-trace-5, in http://gaia.cs.umass.edu/wireshark-labs/wireshark-traces.zip […]

Wireshark Lab: ICMP SOLUTION Supplement to Computer Networking: A Top-Down Approach, 6th ed., J.F. Kurose and K.W. Ross © 2005–21012, J.F Kurose and K.W. Ross, All Rights Reserved The solutions below are based on the trace files ICMP–ethereal–trace-1 and ICMP–ethereal–trace– […]