Classful addressing (Class A, B, C) in Computer Networks - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to identify the class of an IP address based on its first octet.

Computer Networks

if 1 <= first_octet <= [1]:
    ip_class = 'A'

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

A127

B255

C126

D128

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 127 or 128 as the upper limit for Class A.

Class A IP addresses have their first octet in the range 1 to 126.

2fill in blank

medium

Complete the code to check if an IP address belongs to Class B based on its first octet.

Computer Networks

if [1] <= first_octet <= 191:
    ip_class = 'B'

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

A255

B192

C126

D128

Attempts:

3 left

💡 Hint

Common Mistakes

Using 192 as the lower bound instead of 128.

Class B IP addresses have their first octet between 128 and 191.

3fill in blank

hard

Fix the error in the code to correctly identify Class C IP addresses.

Computer Networks

if 192 <= first_octet <= [1]:
    ip_class = 'C'

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

A223

B224

C191

D255

Attempts:

3 left

💡 Hint

Common Mistakes

Using 224 or 255 as the upper limit for Class C.

Class C IP addresses have their first octet between 192 and 223.

4fill in blank

hard

Fill both blanks to complete the code that determines the class of an IP address based on its first octet.

Computer Networks

if first_octet >= [1] and first_octet <= [2]:
    ip_class = 'B'

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

A128

B191

C223

D126

Attempts:

3 left

💡 Hint

Common Mistakes

Using 126 or 223 as bounds for Class B.

Class B IP addresses range from 128 to 191 in the first octet.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps IP classes to their first octet ranges.

Computer Networks

ip_classes = {
    'A': (1, [1]),
    'B': ([2], [3]),
    'C': (192, 223)
}

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

A126

B128

C191

D224

Attempts:

3 left

💡 Hint

Common Mistakes

Using 127 or 224 in the ranges incorrectly.

The ranges are:
Class A: 1-126
Class B: 128-191
Class C: 192-223