Questions and Answers
What are IPv4 addresses divided into?
What is the format of each class of IP address?
Reserved bits, network bits, host bits
What is the format of Class A addresses?
0 // 0000000 // 00000000 00000000 00000000
What is the IP address range for Class A?
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What is the maximum number of addresses that can be assigned to hosts in a Class A network?
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How many Class A networks can be assigned?
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What is an example of a Class A network?
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What is the format of Class B addresses?
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What is the IP address range for Class B?
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What is the maximum number of addresses that can be assigned to hosts in a Class B network?
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How many Class B networks can be assigned?
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What is the format of Class C addresses?
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What is the IP address range for Class C?
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What is the maximum number of addresses that can be assigned to hosts in a Class C network?
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How many Class C networks can be assigned?
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What is the format of Class D addresses?
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What is the IP address range for Class D?
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Study Notes
IPv4 Addresses Overview
- IPv4 addresses are categorized into five classes: A, B, C, D, and E.
IP Address Structure
- Each class consists of three sections: reserved bits, network bits, and host bits.
Class A Format
- Structure: 1 reserved bit (always 0) + 7 network bits + 24 host bits.
Class A Address Range
- Valid IP addresses range from 0.0.0.0 to 127.255.255.255.
Class A Host Capacity
- Maximum assignable IPs for hosts: 2^24 - 2 = 16,777,214.
Class A Network Capacity
- Total Class A networks: 2^7 = 128.
Example Class A Network
- Network Address: 103.0.0.0
- Host IP Range: 103.0.0.1 to 103.255.255.254
- Broadcast Address: 103.255.255.255.
Class B Format
- Structure: 1 reserved bit (1) + 1 reserved bit (0) + 14 network bits + 16 host bits.
Class B Address Range
- Valid IP addresses range from 128.0.0.0 to 191.255.255.255.
Class B Host Capacity
- Maximum assignable IPs for hosts: 2^16 - 2 = 65,534.
Class B Network Capacity
- Total Class B networks: 2^14 = 16,384.
- Suitable for medium to large networks, e.g., large college campuses with ranges like 145.108.0.0 to 145.108.255.255.
Class C Format
- Structure: 1 reserved bit (1) + 1 reserved bit (1) + 1 reserved bit (0) + 21 network bits + 8 host bits.
Class C Address Range
- Valid IP addresses range from 192.0.0.0 to 223.255.255.255.
Class C Host Capacity
- Maximum assignable IPs for hosts: 2^8 - 2 = 254.
Class C Network Capacity
- Total Class C networks: 2^21 = 2,097,152.
- Typically used for small networks, like small businesses, e.g., 202.17.5.0 to 202.17.5.25.
Class D Format
- Structure: 1 reserved bit (1) + 1 reserved bit (1) + 1 reserved bit (1) + 1 reserved bit (0) + 28 multicast bits.
Class D Address Range
- Valid IP addresses range from 224.0.0.0 to 239.255.255.255.
Class D Functionality
- Designed for multicast addressing, allowing simultaneous message delivery to multiple hosts.
- Classes A, B, and C are used for unicast addressing, targeting individual hosts.
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Description
Test your knowledge on classful IP addressing with these flashcards. Each card covers key concepts such as the IPv4 addressing classes and address format. Perfect for networking students looking to solidify their understanding of IP structures.
