Answered: nsmits a packet via the Internet's…

Engineering

Computer Science

nsmits a packet via the Internet's transport layer t

Systems Architecture

7th Edition

ISBN:9781305080195

Author:Stephen D. Burd

Publisher:Stephen D. Burd

Chapter13: Internet And Distributed Application Services

Section: Chapter Questions

Problem 15VE

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A frame containing http request is sent from Computer (A) [in whichever subnet it is now, make sure to show it in your figure], to the access point it is associated with. Draw the address fields (1, 2, and 3) of the frame travelling from Computer A to AP and the source and destination addresses of the frame travelling from AP to R1. The MAC addresses of AP1, AP2, and AP3 are M1, M2, and M3 respectively, and the Router R1’s MAC address connected to this Switch/AP is MRA. IP address values are already given, and the port addresses could also be used as given. The Router’s MAC address facing WAN side is MRW.
For NAT Network Address Translation Scenario: Jenny Bello is a small business owner selling and making customized computer peripherals. She has been finding it difficult to track her sales and inventories, however recently after an expert's advice, she adopted a Point of Sale (PoS) server. So, she can now track her sales and inventories at the store. However, she ran into another issue, the server can only be accessed within the store, because it has been assigned a private IPv4 address, it is not publicly accessible via the Internet. a) Why is not having the PoS server accessible over the Internet a problem for the business? b) What caused this problem? c) Propose a solution for the problem and explain how the solution works.
Assume that there is a shared connection (for example, an Ethernet bus) with a speed of 1 Mbps. How much time (in microseconds) is required to send a frame with a length of 1000 bits over this link?
In a network with a star shape, each computer is joined to a main point. Please give me a description that I can use.
(a) Suppose a server S and client C are connected over the Internet. The one-way prop- agation delay from S to C is 50 ms. The maximum throughput between S and C is R = 200 Mbps. A browser on client C makes an HTTP request for a webpage on server S. The base HTML file is of size 500 KB and it references five objects, each of size 5 MB. Find the total response time for the client to receive the entire webpage using nonpersistent HTTP with up to two parallel connections. Assume that when two par- allel connections are active, the throughput for each connection is 40% of the maximum throughput R. (b) Suppose an application running on host ece.gmu.edu needs to resolve the domain name cs.vtech.edu. Draw a diagram (with labels) showing the sequence of queries/responses in a recursive DNS query to find the answer in a scenario where all levels of the DNS hierarchy are involved.
Discuss the invocation semantics that can be achieved when the request-reply protocol is implemented over a TCP/IP connection, which guarantees that data is delivered in the order sent, without loss or duplication. {Note: Take into account all of the conditions causing a connection to be broken}
6. Consider sending over HTTP a Web page that consists of one video clip, and five images. Suppose that the video clip is transported as 25 frames, and each image has 4 frames. a. If all the video frames are sent first without interleaving, how many "frame times" are needed until all five images are sent? b. If frames are interleaved, how many frame times are needed until all five images are sent.
8. Little's Law with multiple servers. Assume one application sends packets to a network switch at rate .. The switch has only one queue, but it has three network interface cards, each connected to a different switch. The average delay of all packets was T. The service rate for each switch is u Write one equation that relates T, 2, µ, N1, N2, N3 together. N2 N1 N3
Assume that Computer A, which is connected through an Ethernet cable to the Switch S1, is just powered on. The user opens a browser and then types a website address to receive the website from the Server (as shown in Figure 1). Write down all the important protocols that come into play by the time the first frame containing HTTP request reaches R1. (Note: Before HTTP frame, other frames have already been sent by other protocol(s).) Write down all the protocols with reference to the TCP Model as follows? Application Layer: Transport Layer: Internet Layer: Link Layer:
Assume that Computer A, which is connected through an Ethernet cable to the Switch S1, is just powered on. The user opens a browser and then types a website address to receive the website from the Server (as shown in Figure 1). Write down all the important protocols that come into play by the time the first frame containing http request reaches R1. (Note: Before http frame, other frames have already been sent by other protocol(s).) Write down all the protocols with reference to the TCP Model as follows. Application Layer: Transport Layer: Internet Layer: Link Layer: [Physical Layer (if needed)]: After writing down the protocols that come into play, briefly write the procedure as to what happens
Computer Networks
Match the left-column statements to the right-column architecture. A server is constantly on. Processes may serve each other. Communication always involves client and server processes. HTTP employs this architecture. Users control hosts, which may go down unexpectedly. Self-scalable. Answer: peer-to-peer. B. Peer-to-peer. Peer-to-peer or client-server. Client-server D. TCP/IP design.