2. Consider an HTTP client that wants toretrieve a Web document at a given URL.The IP address of the HTTP server isinitially unknown. What transport andapplication-layer protocols besides HTTPare needed in this scenario?O TCP,UDP,DNSТСР, DNSUDP,DNSТСР, FTP

Correct Answer:- (a) - TCP, UDP, DNS Transport layer protocols: TCP for HTTP UDP for DNS;…

Answered: 2. Consider an HTTP client that wants…

A+ Guide To It Technical Support

10th Edition

ISBN:9780357108291

Author:ANDREWS, Jean.

Publisher:ANDREWS, Jean.

Chapter8: Network Infrastructure And Troubleshooting

Section: Chapter Questions

Problem 8TC

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Consider taking an HTTP client to look for a web document in a specified URL. Firstly, it is not known the IP address of the HTTP server. What are needed in this scenario for transport and application-layer protocols apart from HTTP?
Suppose that web server A sends a hypertext document to a web browser in machine B. Describe briefly what happens at each protocol layer. What does encapsulation mean in the context of network protocols?
please answer with proper explanation and step by step solution. Question: Consider a fictional six-layer protocol hierarchy where layer 1 is the lowest layer, and layer 6 is the highest layer. Therefore, an application sends a message M by passing it to layer 6. All the even-numbered layers attach a trailer Ti (i = 2, 4, 6) to their payload, and all the odd-numbered layers attach a header Hi (i = 1, 3, 5) to their payload. Draw the headers, trailers, and original message M in the order they are sent out.
Connection-based protocols could be replaced by connectionless protocols. Look at the pros and cons of each to decide which one is best.
Consider connectionless protocols as a possible replacement for connection-based protocols and evaluate their benefits and drawbacks.
Consider connectionless protocols as a possible replacement for connection-based protocols and analyze their benefits and drawbacks.
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:
4. The original HTTP protocol used TCP/IP as the underlying protocol. For each page, graphic, or applet, a separate TCP connection was constructed, used, and terminated. This caused several problems: one referred to as the elephant and mice problem and two aspects of connection overhead. Describe both problems. Why were separate connections used? Would UDP rather than TCP be a good alternative? What solution would you propose to these problems to improve HTTP performance?
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
Which two of the following are the most persuasive justifications for layered protocols? Please give supporting proof for your claim.
Consider an HTTP client who wants to retrieve a Web document from a given URL. The IP address of the HTTP server (hosting the URL) is initially unknown. What transport and application layer protocols other than HTTP are needed in this scenario? Please consider who has to be contacted for the IP address and the methods used to do this. Also consider how the connection is established with the web server?
Compared to connection-based protocols, consider the benefits and drawbacks of connectionless protocols.

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2. Consider an HTTP client that wants to retrieve a Web document at a given URL. The IP address of the HTTP server is initially unknown. What transport and application-layer protocols besides HTTP are needed in this scenario?