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otez555 [7]
3 years ago
13

Write an If/else statement to check whether host is online. If it is online, then print system is online otherwise print system

is unreachable.
Computers and Technology
1 answer:
Reika [66]3 years ago
4 0

Answer:

from socket import *

hostname = input('Enter the host to be scanned: ')

ip_add = gethostbyname(hostname)

connections = [ ]    

for i in range(133, 136):

   s = socket(AF_INET, SOCK_STREAM)

     

   conn = s.connect_ex((ip_add, i))

   print(conn)

   connections.append(conn)

if 0 in connections:

   print ('Host is online')

   s.close()

else:

   print ('system is unreachable')

Explanation:

The python source code above scans for all the available range of ports in the provided hostname, if any port is available, the host is online else the program print the error message "system is unreachable.

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Answer:

The answer to this question is given below in the explanation section.

Explanation:

The given Python code is:

>>> A = ['dog''red']

>>> B = [' cat', 'blue']

>>>C = ['fish', 'green']

We can implement an array of this data by using the dictionary in Python.

Dictionary in python:

A dictionary in python stores (key-value) pairs. For example, we can implement the -given arrays A, B, and C in the dictionary as given below:

d={'dog : red', 'cat : blue', 'fish : green'}

print(d['dog']) # Get an entry from a dictionary; prints "red"

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print(d['fish'])      # Prints "black"

# print(d['elephant'])  # KeyError: 'elephant' not a key of d

print(d.get('elephant', 'N/A'))  # Get an element with a default; prints "N/A"

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del d['dog']        # Remove an element from a dictionary

print(d.get('dog', 'N/A')) # "dog" is no longer a key; prints "N/A"

3 0
2 years ago
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