Question

c) Suppose an application generates chunks of 60 bytes of data every 20 msec, and each...

c) Suppose an application generates chunks of 60 bytes of data every 20 msec, and each chunk gets encapsulated in a TCP segment and then an IP datagram. What percentage of each datagram will be overhead, and what percentage will be application data?

d) What is network address translation? Briefly explain with an example.

Homework Answers

Answer #1

c) TCP and IP are 20bytes each which makes of 40 bytes

And the data chunks to be added is 60 bytes which makes total of 100 total bytes

then the over head is 40 of the 100 total ,which is 40%.

40% (20 TCP byte+ 20 IP byte + 60 byte data chunk =100 bytes;100/40=40%).

d)Network address translation which is also called as NAT is a process in which one or more local IP address space into another by modifying network address information in the IP packets when they are in transit across a routing device. It was used to avoid the need to assign a new address to every host when a network was moved, but could not route the networks address space. One Internet-routable IP address of a NAT gateway can be used for an entire private network and generally operates on router or firewall.

Example:

The below diagram shows the working of NAT,
when Host PC 172.168.20.10 wants to communicate with the outside and the destination web server IP is
192.100.20.2. It will send a data packet to the gateway router with NAT for communication. The gateway router reads the source IP address of the packet and checks in the table whether the packet meets the condition for translation. The gateway router maintains an access control list which locates the authenticate hosts for the internal network translation purposes. It translate's the inside local IP address into an inside global IP address as 192.100.10.25. Then it stores in the NAT table and the gateway router will route the packet to the destination. When the web server of the Internet responds back to the request, the packet will respond back to the global IP address 192.100.10.25 of the router. The gateway router will again check in the NAT table to find out the translated IP address with respect to the global address. It translate to the inside local address and then the data packet is delivered to host PC address 172.168.20.10. If a search is not found in the table then it is discarded.

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
1.Consider an application which transmits data at a bursty rate (e.g., the sender generates data for...
1.Consider an application which transmits data at a bursty rate (e.g., the sender generates data for short burst of time and the sender is idle almost all the time) Would a packet-switched network or a circuit-switched network be more appropriate for this application?Why? 2.DNS can not work if the host names are not hierarchal? Explain? 3.FTP is a push protocol? True False 4.Is it is possible for an application on top UDP to have a reliable data transfer? explain? 5....
V At the completion of the chapter you should have an understanding of the following Chapter...
V At the completion of the chapter you should have an understanding of the following Chapter Objectives: What is the Purpose of a Network Model? What are the layers of the OSI Model? What are the characteristics of each layer of the OSI Model? How does the TCP/IP stack compare to the OSI Model? What are the Well Known TCP and/or UDP Port Numbers for a given collection of common applications? Define the Following Terms: Application Layer (OSI Model): Application...
Please answer the following Case analysis questions 1-How is New Balance performing compared to its primary...
Please answer the following Case analysis questions 1-How is New Balance performing compared to its primary rivals? How will the acquisition of Reebok by Adidas impact the structure of the athletic shoe industry? Is this likely to be favorable or unfavorable for New Balance? 2- What issues does New Balance management need to address? 3-What recommendations would you make to New Balance Management? What does New Balance need to do to continue to be successful? Should management continue to invest...
What tools could AA leaders have used to increase their awareness of internal and external issues?...
What tools could AA leaders have used to increase their awareness of internal and external issues? ???ALASKA AIRLINES: NAVIGATING CHANGE In the autumn of 2007, Alaska Airlines executives adjourned at the end of a long and stressful day in the midst of a multi-day strategic planning session. Most headed outside to relax, unwind and enjoy a bonfire on the shore of Semiahmoo Spit, outside the meeting venue in Blaine, a seaport town in northwest Washington state. Meanwhile, several members of...
Delta airlines case study Global strategy. Describe the current global strategy and provide evidence about how...
Delta airlines case study Global strategy. Describe the current global strategy and provide evidence about how the firms resources incompetencies support the given pressures regarding costs and local responsiveness. Describe entry modes have they usually used, and whether they are appropriate for the given strategy. Any key issues in their global strategy? casestudy: Atlanta, June 17, 2014. Sea of Delta employees and their families swarmed between food trucks, amusement park booths, and entertainment venues that were scattered throughout what would...