Socket programming basics in Computer Networks - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a socket using IPv4 and TCP protocols.

Computer Networks

sock = socket.socket(socket.[1], socket.SOCK_STREAM)

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AAF_INET6

BAF_INET

CSOCK_DGRAM

DSOCK_RAW

Attempts:

3 left

💡 Hint

Common Mistakes

Using AF_INET6 instead of AF_INET for IPv4 sockets.

Confusing socket types with address families.

The AF_INET constant specifies the IPv4 address family, which is commonly used for TCP sockets.

2fill in blank

medium

Complete the code to bind the socket to all interfaces on port 8080.

Computer Networks

sock.bind(([1], 8080))

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A"0.0.0.0"

B"localhost"

C"127.0.0.1"

D"255.255.255.255"

Attempts:

3 left

💡 Hint

Common Mistakes

Binding to 'localhost' limits connections to local only.

Using broadcast address '255.255.255.255' is incorrect for binding.

The IP address "0.0.0.0" means binding to all available network interfaces on the machine.

3fill in blank

hard

Fix the error in the code to listen for incoming connections with a backlog of 5.

Computer Networks

sock.[1](5)

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Aconnect

Bbind

Clisten

Daccept

Attempts:

3 left

💡 Hint

Common Mistakes

Using accept() before listen().

Using bind() or connect() incorrectly here.

The listen() method enables the socket to accept incoming connections, with the argument specifying the maximum queued connections.

4fill in blank

hard

Fill both blanks to accept a connection and receive data from the client.

Computer Networks

conn, addr = sock.[1]()
data = conn.[2](1024)

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Aaccept

Brecv

Csend

Dconnect

Attempts:

3 left

💡 Hint

Common Mistakes

Using send() instead of recv() to receive data.

Using connect() on server side instead of accept().

The accept() method waits for an incoming connection and returns a new socket and address. The recv() method reads data from the connection.

5fill in blank

hard

Fill all three blanks to send a response and close the connection properly.

Computer Networks

conn.[1](b"HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\n\r\nHello")
conn.[2](socket.SHUT_RDWR)
sock.[3]()

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Asend

Bclose

Cshutdown

Drecv

Attempts:

3 left

💡 Hint

Common Mistakes

Calling close() before shutdown(), which may cause data loss.

Using recv() instead of send() to send data.

First, send() sends the response bytes. Then shutdown() disables further sends and receives on the connection. Finally, close() releases the socket resources.