Socket in computer network

Question 1

What is a socket?

Answer 1

1 endpoint of a 2 way communication link between 2 programs running on a network.
Each socket has a specific address, composed of an IP and a port

Question 2

How is a connection established with the socket technique?

Answer 2

• Server creates socket, attaches it to a network port addres,
• then waits for the client to contact it
• client creates a socket, then attempts to connect to the server socket
• when connection is established -> data transfer takes place

Question 3

Name the 2 types of sockets

Answer 3

Datagram socket
Stream socket

Question 4

What is a datagram socket?

Answer 4

Type of network which has connection less points for sending and receiving packets. (Similar to mailbox
-> The letters (data) posted into the box are collected and delivered (transmitted) to a letterbox (receiving socket) )

Question 5

What is a stream socket?

Answer 5

• Type of network socket which provides a connection-oriented,
  sequenced, and unique flow of data
• without record boundaries
• with well defined mechanisms for creating and
  destroying connections and for detecting errors. (Similar to phone
  -> Connection is established between the phones (two ends) and a conversation (transfer of data) takes place.

Question 6

What parameter to the sock function is used to store IPv4 address?

Answer 6

socket.AF_INET

Question 7

What parameter to the sock function is used to store the protocol (tcp)?

Answer 7

sock.SOCK_STREAM