Computer ScienceFigure 7-18RouterRouterRouterRouterProxy ServerInternetSample network for configuration.1. You are identifying TCP/IP configurationrequirements for the network shown in Figure7-18. You are to use the network address192.168.12.0 for the entire network. Each subnetmust support up to 55 hosts. All the clients willshare the proxy server for Internet access.(a) What network addresses will you use?(b) Why must you use a different network addressfor each segment?(c) What is the subnet mask?(d) At minimum, how many public IP addresses willbe required?(e) Why?(f) How can you keep to a minimum theadministrative overhead required to manage hostIP addresses?(g) What are the configuration requirements for thisto work?

a) 192.168.12.0, 192.168.12.64, 192.168.12.128 and 192.168.12.192 b) We create subnets for making…

Answered: Computer Science

Engineering

Computer Science

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

See similar textbooks

Similar questions

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 pos- sible that one side starts closing a connection while the other side is transmitting data via this connection? Explain.
True or false 6. Before sending a data packet into a packet-switching network, the source must determine all of the links that the packet will traverse between source and destination. 7. With non-persistent connections between a web browser and a web server, it is possible for a single TCP segment to carry two distinct HTTP request messages.
The secure socket layer (SSL) protocol allows for secure communication between a client and a server. There are known flaws in the SSLv2 protocol. A man-in-the-middle attacker can force the communication to a less secure level and then attempt break the encryption. The attacker can also truncate encrypted messages. These flaws have been fixed in SSLv3 (TLSv1). Most servers and clients support both SSLv2 and SSLv3. However, SSLv2 is enabled by default for backward compatibility. Answer the following questions, a) Find out the impact in the above statement. b) What is the solution? c) Do you think SSLv3 is more secure? Justify your answer.
Download delays for 100 objects (HTTP 1.1 with browser caching). Consider an HTTP 1.1 client and server. The RTT delay between the client and server is 2 seconds. Suppose the time a server needs to transmit an object into its outgoing link is 3 seconds, as shown below for the first of these 100 requests. initiate TCP connection RTT request file RTT file received time You can assume that any other HTTP message not containing an object sent by the client and server has a negligible (zero) transmission time. Suppose the client makes 100 requests, one after the other, waiting for a reply to a request before sending the next request. 352 secs Using HTTP 1.1, how much time elapses between the client transmitting the first request, and the receipt of the last requested object, assuming the client uses the IF- MODIFIED-SINCE header line, and 50% of the objects requested have not changed since the client downloaded them (before these 100 downloads are performed)? 350 secs 252 secs time to…
Q#3: Suppose you are the network security administrator of a well-known company. Your boss has established a deal with another company in another city and now a VPN is setup between the headquarters of two companies for secure communication. Your boss requires you to guarantee a minimum download and uploading speed. Answer the following questions: Do you think it is feasible to implement a VPN between the two companies having multiple sites? Which layer VPN would you prefer to implement? Why? Which type of VPN would you prefer to implement? Why? Which protocol would you use to implement the VPN? Why?
Computer Science Design in PYTHON a basic forward proxy server that can handle HTTP traffic. The following features must be present: 1. Logging entails recording all outgoing and incoming requests. 2. Adding domains to the blacklist for further security. For example, you may restrict a certain IP address or website. 3..Managing several transactions (i.e. many requests and responses) at the same time to increase performance. 4. Adding domains to the blacklist for further security. For example, you may restrict a certain IP address or website. I'll offer an upvote to anyone who successfully answers this question.
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 n DNS servers are visited before your host receives the IP address from DNS; the successive visits incur an RTT of RTT1, ..., RTTn. Further suppose that the Web page associated with the link contains exactly one object, consisting of a small amount of HTML text. Let RTTO denote the RTT between the local host and the server containing the object. Assuming zero transmission time of the object, how much time elapses from when the client clicks on the link until the client receives the object?
1. A network has a DHCP server that manages a Class C network for IP addresses it gives out. Over the course of a week, 75- 80 people with devices come and go and their devices connect to the network each day. Often, by Wednesday or Thursday, people complain about not being able to connect to the network. Why can the lease life parameter be causing the problem?
In IEEE 802.11, two-way communication is used to authenticate an open system. In order to authenticate the client, the server must give the station ID (typically the MAC address). Response to the client's previous request is either a successful or failed authentication response from the access point/router. An error may arise if, for example, an AP/router configuration does not include the client's MAC address.In what ways is it advantageous to use this kind of authentication scheme?In what ways does this authentication technique have security vulnerabilities that might be mitigated?
Computer Science Networks and should be done in C language. Create a UDP client and server program that not only is able to locally transfer files but it gives the client the ability to send multiple copies of the file to multiple servers. Once the server program is initiated, it waits until it receives client packets. It then reads and saves the payload of the packets. The client reads a file from the disk and sends it to each server over a UDP socket by breaking the file up into mtu-byte sized packets. Client needs to be concurrent in sending the packets to all of the servers using threads
Suppose Alan, with a Web-based e-mail account (such as Gmail or Yahoo! Mail), sends a message to Benson, who accesses his mail from his mail server using POP3. Discuss how the message gets from Alan's host to Benson's host. Be sure to list the series of application-layer protocols that are used to move the message between the two hosts.
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 localhost, so a DNS lookup is necessary to obtain the IP address. Suppose that n DNS servers are visited before your host receives the IP address from DNS; the successive visits incur an RTT of RTT1, . . ., RTTn. Further suppose that the Web page associated with the link contains exactly one object, consisting of a small amount of HTML text. Let RTT0 denote the RTT between the local host and the server containing the object. Assuming zero transmission time of the object, how much time elapses from when the client clicks on the link until the client receives the object? Justify your answer.