Computer Networks: Sockets and Network APIs

Connectionless sockets use UDP, which provides an unreliable, best-effort networking service, whereas TCP/IP provides a reliable, connection-oriented service.

An apartment building, mailboxes, and post office, where the apartment building is the address, mailbox is the port, and socket is the key to access the mailbox.

Create a socket, set up the server address, connect to the server, read/write data, and shutdown the connection.

<p>To provide transport layer addressing in the form of UDP ports, with an optional checksum capability.</p> Signup and view all the answers

<p>To allow the sender and receiver to check for data corruption.</p> Signup and view all the answers

<p>UDP does not require setting up special transmission channels or data paths beforehand, unlike TCP/IP.</p> Signup and view all the answers

<p>To provide an abstraction for interprocess communication and define an endpoint for communication</p> Signup and view all the answers

<p>To establish a connection between the client and server and facilitate data transfer</p> Signup and view all the answers

<p>Stream sockets provide reliable, connected networking service, whereas datagram sockets provide connectionless service</p> Signup and view all the answers

<p>The server binds an address that clients can use to find the server and then waits for client requests</p> Signup and view all the answers

<p>Stream socket (connection-oriented socket)</p> Signup and view all the answers

<p>They do not establish a connection before transferring data</p> Signup and view all the answers

<p>To create a fingerprint for the message/file that can be used to detect errors in the data.</p> Signup and view all the answers

<p>It does not; acknowledgement and error detection must be done by the application layer.</p> Signup and view all the answers

<p>They help find transfer bit errors and protect against other network errors, such as IP datagrams reaching the wrong host.</p> Signup and view all the answers

<p>When acknowledgement is necessary.</p> Signup and view all the answers

<p>A byte stream service.</p> Signup and view all the answers

<p>The <code>count</code> variable returns the number of bytes transmitted or received, or -1 if an error occurs.</p> Signup and view all the answers

<p>The <code>flags</code> parameter specifies special options, usually set to 0 for acknowledgement.</p> Signup and view all the answers

<p>Blocking calls can be challenging because they can cause the program to wait indefinitely. This can be addressed by creating multi-process or multi-threaded code, turning off the blocking feature, or using the <code>select()</code> function.</p> Signup and view all the answers

<p>The <code>select()</code> function allows the program to monitor multiple sockets for input and perform non-blocking I/O operations.</p> Signup and view all the answers

<p>A simple connection involves a single connection and sequential sends and receives, while a complex connection routine involves multiple connections, simultaneous sends and receives, and non-networking processing.</p> Signup and view all the answers

<p>The <code>bind()</code> function associates a local address and port with a socket.</p> Signup and view all the answers