TCP/ ip, Computer Network Security

Assignment Help:
Q1 (15 marks, 5 marks each part):
This question has three parts:

In a short paragraph (200-300 words) explain the fundamentals of Packet Switching and how it works.
In a short paragraph (200-300 words) explain the fundamentals of Circuit Switching and how it works.
Using your own words, in a short paragraph (200-300 words) discuss and explain why packet switched networks are used for data communication instead of circuit switched.

Q2 (30 marks, 10 marks each group)
An ISP is granted a block of addresses starting with 110.50.0.0/16. The ISP needs to distribute these blocks to 2600 customers in the following three groups:

The first group has 200 medium-size businesses; each needs approximately 120 addresses.
The second group has 400 small-size businesses; each needs approximately 20 addresses.
The third group has 2000 households; each needs 6 addresses.
Design the sub blocks and give the slash notation for each sub block. Find out how many addresses are still available after these allocations. You need to show your working and math and explain how your achieved your sub-netting solutions. Write your subnets in a table like the following.

Group Number of Businesses Users per business Subnet (---.---.---.--- / ---) Number of remained usable addresses in the subnet
1 200 120
2 400 20
3 2000 6


Q3 (15 marks, 5 marks each question)
Using this diagram, answer the following routing questions:



A packet arrived at router R1-m2 with destination address 145.80.23.14. Explain how it is forwarded to its destination.
A packet arrived at router R2-m0 with destination address 170.14.24.12. Explain how it is forwarded to its destination.
A packet arrived at router R3-m0 with destination address 135.15.42.18. Explain how it is forwarded to its destination.
Q4 (28 marks, 14 marks each part)
A router with IP address 132.145.132.112 and Ethernet physical address of a1:a2:a3:a4:a5:a6 has received a packet for a host destination with IP address 152.111.178.110. The router does not know about the Ethernet physical address of the host. Assume the Ethernet address of the destination host is b1:b2:b3:b4:b5:b6 and the router is going to find it through and ARP request.

Show the entries in the ARP request packet sent by the router. Encapsulate this packet in a data link frame and fill all the fields.
Show the entries of the ARP packet sent in response to the packet in first part. Encapsulate this packet in a data link frame and fill all the fields.
Hint: Use example 8.1 as a template to explain your answer. Use the same drawing tradition to show your packets.


Q5 (12 marks, 4 marks each)
This question has three parts:

In a short paragraph (200-300 words), explain ICMP and why it is important.
In a short paragraph (200-300 words) explain “ping” and “traceroute” in UNIX --or “tracert” in Windows--, how they work and how they are different.
Show two screenshots of using ping and traceroure/tracert to address www.csu.edu.au. Pay attention to the delays and try to explain them.

Related Discussions:- TCP/ ip

Nstissc security model, NSTISSC SECURITY MODEL The NSTISSC Security Model ...

NSTISSC SECURITY MODEL The NSTISSC Security Model provides a detailed perspective on security. While the NSTISSC model covers the 3 dimensions of information security, it removes

Network analysis and network representation of a project, Question: Net...

Question: Network diagrams combine with a set of systematic analysis procedures, serve to remedy the shortcomings of the Gantt chart. Explain the following terms used in the ne

Produce a packet from a wireshark capture, Question requires you to produce...

Question requires you to produce a pcap file from a Wireshark capture.  In addition, you must include a screen capture of Wireshark and some specific information regarding the fram

Ethical hacking penetration testing, Get a copy of Metasploitable at Make...

Get a copy of Metasploitable at Make">http://sourceforge.net/projects/metasploitable/files/Metasploitable2/ Make sure to follow these directions very carefully. You will get po

Produce a pcap file from a wireshark capture, Question requires you to prod...

Question requires you to produce a pcap file from a Wireshark capture.  In addition, you must include a screen capture of Wireshark and some specific information regarding the fram

Explain the encryption model or symmetric cipher model, With explain the en...

With explain the encryption model the help of diagram. Symmetric cipher model uses the secret-key or a single-key for encryption/decryption purposes. It employs a symmetric encr

Introduction to cryptography, INTRODUCTION TO CRYPTOGRAPHY Cryptography...

INTRODUCTION TO CRYPTOGRAPHY Cryptography The word cryptography is derived from Greek words kryptos, which means hidden and graphein, meaning to write, this is the process of

Wfabilling project in java, WFABilling project in Java:  Project Title...

WFABilling project in Java:  Project Title: WFABilling   Role                      : Developer Domain                 : Tele-Com Environment          : Java, J2EE, S

What are the ethical issues and implications, An injunction to 'think ethic...

An injunction to 'think ethically' about a situation is not helpful. Perhaps if one has a background in moral philosophy this would work, but usually both students and IT professio

Provide the network configuration, QUESTION: a) Below is a capture of a...

QUESTION: a) Below is a capture of an Ethernet II frame which has an IPv4 packet and a segment. Provide the source MAC address in hexadecimal; the source IP address, the length

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd