Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Computer Network & Security Expert

problem 1) In this section, you will learn a couple of practical tools: route, and ifconfig, and netstat. Below is a very brief explanation of what they do.

route The route command can be used to view and manipulate IP routing table.

netstat is a tool which can be used to exhibit network connections, routing tables, interface statistics and many other things.

ifconfig The ifconfig command is used to configure a network interface and to display the status of the currently active interfaces.

(a) Run the route command. prepare down the use of the entry with netmask 0.0.0.0?

(b) Assume a malicious attacker runs \route del" to delete routing entry corresponding to 128.2.13.128/26 on one of the unix.andrew.cmu.edu machines. Now you try to run \ping www.cnn.com". Do you expect the ping to get through? Harry Bovik, the local networking guru argues that \Well, there is still a default route, so the ping should go through!" Harry's pessimistic alter ego suggests otherwise, but does not have a reason. Should Harry believe his alter ego or dismiss it as a case of unjustified pessimism? Give a brief 1-2 line answer why.

(c) Name the command to view the routing table of your machine using netstat? What is the command to only show IP addresses and not host names in the routing table?

(d) How can you use netstat to determine what the network interfaces of your machine are? What is the MTU of your Ethernet interface?

(e) Run ifconfig. What information does the field \Mask" give you?

(f) What happens if you run ifconfig and configure an interface to be in promiscuous mode?

problem 2) A forwarding table for a router in a network using CIDR is given below.

Address prex         Next hop
200.0.0.0/5                 A
192.0.0.0/2                 B
128.0.0.0/2                C
0.0.0.0/0                     D

(a) If the router receives a packet with destination 199.42.13.37, what will the next hop be?

(b) If the router recieves a packet with destination 255.255.255.255, what will the next hop be?

(c) Assume I add the entry 128.25.0.0/16 to the routing table. Will lookups still yield a single forwarding entry? describe.

(d) What actually happens to packet which only matches 0.0.0.0/0?

Computer Network & Security, Computer Science

  • Category:- Computer Network & Security
  • Reference No.:- M96749

Have any Question? 


Related Questions in Computer Network & Security

Networking and server landscape of rays foodusing the

Networking and server landscape of Ray's Food. Using the Configuration Scenario Instructions, create a 1-page Systems Diagram in Microsoft Visio, or another diagramming tool, that shows the technical networking and serve ...

There are a number of cellular phone companies each serving

There are a number of cellular phone companies each serving their own unique geographical areas. Likewise, they each may use a different technology to transfer communication. Research the pros and cons 3G and 4G technolo ...

Cryptography assignment1 decrypt the following message

Cryptography Assignment 1. Decrypt the following message. Assume direct letter substitution. blf szev yvvm z tivzg xozhh. I drhs blf zoo hfxxvhh zmw hzkkrmvhh. 2. Research the RSA cryptographic algorithm. a. If the Publi ...

You work the night shift at a software development company

You work the night shift at a software development company and mange six Web servers that host the company's e commerce solution for medical and dental supplies. You notice that traffic across the network dropped signifi ...

Assignmentall questionscarry equal weight do not change the

Assignment All Questionscarry equal weight. Do not change the order of questions. To receive full credit, show all of your work. Answers must be typed in, following APA style. Handwritten solutions will not be accepted a ...

1 list and describe the four types of computer networks

1. List and describe the four types of computer networks from largest to smallest.  2. Define client/server computing, packet switching, and TCP/IP.  Explain how these three things make the Internet so powerful and robus ...

Introduction to information systems securityphysical

Introduction to Information Systems Security Physical Security Paper Research the following topic: Physical Security • What types of physical controls can be implemented to protect the perimeter of a building? • What typ ...

Case projectnbsp law firm companynbsp law firm lincoln

CASE PROJECT:  LAW FIRM Company:  Law Firm: Lincoln Partners, Esq. A law firm has hired you as a Network Security Consultant to help its operations by providing a secure network to support its growth.  The Law firm curre ...

Assignmentyou have been tasked with reconfiguring the

Assignment You have been tasked with reconfiguring the network for your company, which has grown considerably over the past year. You have used only static routing in the past, but you do not wish to spend the administra ...

Security configuration managementkey assignmentsignificant

Security Configuration Management Key Assignment Significant work has been completed over the past few weeks on the Network Security Architecture Design document, including the following: • Security Requirements • Perime ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen