Which one of the following statements is FALSE? File Transfer Protocol (FTP) is a TCP service that operates on ports 20 and 21. Telnet is a TCP service that operates on port 23. Simple Network Management Protocol (SNMP) is a TCP service that operates on port 25. Dynamic Host Configuration Protocol (DHCP) is a TCP service that operates on port 80.

Here, four statement are given about different services running on different port numbers: File…

Answered: Which one of the following statements…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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The following questions are related to HTTP protocol Q1. The first line of a HTTP request from some client to some server is basically made of where the web page file path is added. The path is shown as folders separated by slash. Q2. If an HTTP server responds to a client request and the response is a success, what is the http code and string that marks a success response? Must provide the code and the string as they appear in TCPDump or Wireshark traces. (note: use upper case for the string and also proper spacing in you answers. Keep the order of the string and the code as seen in TCPDump) Answer: code and string that marks a success response Q3. What http header field is used to identify an address of a web page (i.e. the URI) that linked to the resource currently being requested. This field indicates the last page the user/requester was on by the time they link to the requested page. Answer: The field that indicates the last page the user/requester was on is Q4. What is the http…
SMTP (Simple Mail Transfer Protocol) is the standard protocol for transferring mail between hosts. A TCP connection is set up between a user agent and a server program. The server listens on TCP port 25 for incoming connection requests. The user end of the connection is on a TCP port number above 1023. You have defined the packet filter rule set shown in the table below. These rules permit and/or deny inbound and outbound traffic between the user agent and the mail server. Describe the purpose of each packet filter rule in the table. Rule Direction Source Address Destination Address Protocol Destination Port Action A2 In External Internal TCP 25 Permit B2 Out Internal External TCP > 1023 Permit C2 Out Internal External TCP 25 Permit D2 In External Internal TCP > 1023 Permit E2 Either Any Any Any Any Deny
Which Transmission Control Protocol (TCP) fields are utilized in the implementation of TCP's sliding window algorithm?
Host A and B are directly connected with a 100 Mbps link. There is one TCP connection between the two hosts, and Host A is sending to Host B an enormous file over this connection. Host A can send its application data into its TCP socket at a rate as high as 120 Mbps but Host B can read out of its TCP receive buffer at a maximum rate of 50 Mbps. Describe the effect of TCP flow control.
In HTTP version 1.0, a server marked the end of a transfer by closing the connection. Explain why, in terms of the TCP layer, this was a problem for servers. Find out how HTTP version 1.1 avoids this. How might a general-purpose request/reply protocol address this?
QUESTION 13 Fill the blank With the TCP server, there is a welcoming socket, and each time a client initiates a connection to the server, a new socket is created. Thus, to support n simultaneous connections, the server would need sockets. O n-1 On O n+1 01
Draw a complete TCP 3-way handshake logical diagram of an HTTP session with a website session.
What does it mean when an HTTP query has a header field of "Connection: keep-alive"? a. The client can keep the TCP connection open for future requests/responses if this is supported by the server. O b. Use UDP for additional connections to the server. c. Continually send an object from the server to the client until the client has acknowledged receipt of the requested object. O d. Use the QUIC protocol for this connection.
Here, we'll look at the differences between "connectionless" and "connection-based" protocols.
Using HTTP 1.0, how much time elapses between the client transmitting the first request, and the receipt of the last requested object?
The UDP server only required a single socket, while the TCP server required two sockets to function properly. Why? How many sockets would the TCP server need if it could handle n connections from various client hosts at once?
Draw a complete TCP 3-way handshake logical diagram of an HTTP session with a website session with TCP 3-way handshake with the appropriate flowchart modules such as the start, decision, action and stop modules

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		File Transfer Protocol (FTP) is a TCP service that operates on ports 20 and 21.
		Telnet is a TCP service that operates on port 23.
		Simple Network Management Protocol (SNMP) is a TCP service that operates on port 25.
		Dynamic Host Configuration Protocol (DHCP) is a TCP service that operates on port 80.