A multinational corporation owns offices in various locations. One of its offices has a slow WAN owing to its remote location. To speed up file access for users, the network administrator sets up an infrastructure where the file shares are stored in SERVER X in one location and are also stored on SERVER Y in the remote location. However, the files are not replicated in each server. Which of the following technologies is being used in this scenario? a. A domain controller b. BitLocker c. BranchCache d. A Distributed File System

A multinational corporation owns offices in various locations. One of its offices has a slow WAN owing to its remote location. To speed up file access for users, the network administrator sets up an infrastructure where the file shares are stored in SERVER X in one location and are also stored on SERVER Y in the remote location. However, the files are not replicated in each server. Which of the following technologies is being used in this scenario? a. A domain controller b. BitLocker c. BranchCache d. A Distributed File System

Comptia A+ Core 1 Exam: Guide To Computing Infrastructure (mindtap Course List)

10th Edition

ISBN:9780357108376

Author:Jean Andrews, Joy Dark, Jill West

Publisher:Jean Andrews, Joy Dark, Jill West

Chapter8: Network Infrastructure And Troubleshooting

Section: Chapter Questions

Problem 8TC

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Suppose that a Web server runs in Host C on port 80 . Suppose also that this Web server uses persistent connections, and is currently receiving requests from two different Hosts, A and B. a) Are all of the requests being sent to the same port number at Host C? b) Will the client use port 80 in its local machine to communicate with the server? c) How does the server differentiate between the two requests?
Suppose Host A is sending a file to Host B. Assume that the file of 400,000 bits is broken up into 8 packets. The number of links between Host A and Host B is 5 links, each one with rate 1Mbps and length of 1000 kms. How long does it take to send the file? Suppose the propagation speed over each link is is 2.5 x 108 m/s. 620 msecs 604 msec 454 msec 470 msec 4.804 sec
B. Suppose within your Web browser you click on a link to obtain a Web page. The IP address for the associated URL is not cached in your local host, so a DNS lookup is necessary to obtain the IP address. Suppose that two DNS servers are visited before your host receives the IP address from DNS. The first DNS server visited is the local DNS cache, with an RTT delay of RTTO = 5 msecs. The second DNS server contacted has an RTT of 8 msecs. Initially, let's suppose that the Web page associated with the link contains exactly one object, consisting of a small amount of HTML text. Suppose the RTT between the local host and the Web server containing the object is RTTHTTP=63 msecs. 1. Assuming zero transmission time for the HTML object, how much time elapses from when the client clicks on the link until the client receives the object? 2. Suppose the HTML object references 4 very small objects on the same web server. Neglecting transmission times, how much time elapses from when the client…
Suppose within your web browser you click on a link to obtain a Web page. The IP address for the associated URL is not cached in your local host, so a DNS lookup is necessary to obtain the IP address. Suppose that three DNS servers are visited before your host receives the IP address from DNS. The first DNS server visited is the local DNS cache, with an RTT delay of RTT = 4 msecs. The second and third DNS servers contacted have RTTs of 45 and 24 msecs, respectively. Initially, let's suppose that the Web page associated with the link contains exactly one object, consisting of a small amount of HTML text. Suppose the RTT between the local host and the Web server containing the object is RTTHTTP = 9 msecs. Assuming zero transmission time for the HTML object, how much time elapses from when the client clicks on the link until the client receives the object? (Do not forget the TCP handshake(s).) 82 msecs O 91 msecs O 46 msecs O 67 msecs
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Obtain the HTTP/1.1 specification (RFC 2616). Answer the following questions: a. Explain the mechanism used for signaling between the client and server to indicate that a persistent connection is being closed. Can the client, the server, or both signal the close of a connection? b. What encryption services are provided by HTTP? c. Can a client open three or more simultaneous connections with a given server? d. Either a server or a client may close a transport connection between them if either one detects the connection has been idle for some time. Is it possible that one side starts closing a connection while the other side is transmitting data via this connection? Explain.