Can a socket be a server and a client?

For a server, you usually create a socket, then bind it to a specific port, and accept connections. For the client, you create a socket, and connect to a specified address (an IP address and port pair for a TCP/IP connection). The same device can run a TCP server and client at the same time.

Can client and server run on same machine?

Answer: Yes, TCP/IP socket server and client applications can be executed on the same machine. TCP Client and server programs are two different and independent application. Just tcp client has to connect to correct address of the tcp server.

How is a socket established between a client and a server?

A socket has a typical flow of events. In a connection-oriented client-to-server model, the socket on the server process waits for requests from a client. To do this, the server first establishes (binds) an address that clients can use to find the server.

Why does a server program need two sockets?

2 Answers. The reason is that TCP has two different kinds of state that you want to control, whereas UDP has only one.

Can two clients connected to same port?

Irrespective of stateful or stateless protocols, two clients can connect to same server port because for each client we can assign a different socket (as client IP will definitely differ). Same client can also have two sockets connecting to same server port – since such sockets differ by SRC-PORT .

Can a server be both client and server?

A server is a computer or system that provides resources, data, services, or programs to other computers, known as clients, over a network. This means that a device could be both a server and a client at the same time.

What are the two different parameters required to connect client and server using sockets?

The connect function is called by the client to establish a connection to the server. It takes three arguments, the socket file descriptor, the address of the host to which it wants to connect (including the port number), and the size of this address.

Can 2 applications use the same port?

Yes, different applications can bind to the same port on different transport protocols. They can also open the same port on the same protocol but different IP addresses.

Can TCP and UDP use the same port?

Yes, you can use the same port number for both TCP and UDP. Many protocols already do this, for example DNS works on udp/53 and tcp/53.

How many clients can connect to a server socket?

On the TCP level the tuple (source ip, source port, destination ip, destination port) must be unique for each simultaneous connection. That means a single client cannot open more than 65535 simultaneous connections to a single server. But a server can (theoretically) serve 65535 simultaneous connections per client.