Serial vs Ethernet communication in SCADA systems - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to open a serial port connection.

SCADA systems

serial_port = Serial(port=[1], baudrate=9600)

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A"COM3"

BEthernet()

C"192.168.1.1"

Dsocket()

Attempts:

3 left

💡 Hint

Common Mistakes

Using Ethernet or IP address instead of serial port name.

To open a serial port, you specify the port name like "COM3".

2fill in blank

medium

Complete the code to create an Ethernet socket connection.

SCADA systems

sock = socket.socket(socket.AF_INET, socket.SOCK_[1])

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ARAW

BSTREAM

CDGRAM

DSEQPACKET

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing datagram (UDP) socket for TCP connection.

For TCP (Ethernet) connections, use SOCK_STREAM for a reliable stream socket.

3fill in blank

hard

Fix the error in the code to send data over serial port.

SCADA systems

serial_port.write([1])

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A"Hello"

Bbytearray("Hello")

Cb"Hello"

DHello

Attempts:

3 left

💡 Hint

Common Mistakes

Sending string instead of bytes causes error.

Serial write requires bytes, so prefix string with b to make bytes literal.

4fill in blank

hard

Fill both blanks to create a dictionary mapping communication types to their typical ports.

SCADA systems

comm_ports = {"serial": [1], "ethernet": [2]

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A"COM3"

B80

C22

D"192.168.1.100"

Attempts:

3 left

💡 Hint

Common Mistakes

Using IP address instead of port number for Ethernet.

Serial ports use names like "COM3"; Ethernet commonly uses port 80 for HTTP.

5fill in blank

hard

Fill all three blanks to create a function that sends a message over the chosen communication type.

SCADA systems

def send_message(comm_type, message):
    if comm_type == "serial":
        port = Serial(port=[1], baudrate=9600)
        port.write(message.[2]())
    elif comm_type == "ethernet":
        sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        sock.connect(([3], 80))
        sock.sendall(message.encode())

Drag options to blanks, or click blank then click option'

A"COM4"

Bencode

C"192.168.0.10"

Ddecode

Attempts:

3 left

💡 Hint

Common Mistakes

Using decode() instead of encode() for sending.

Using IP address as serial port name.

Serial port needs a port name like "COM4". To send bytes, encode the message. Ethernet socket connects to an IP address.