Table of Contents
- 1 How many network IDS does a class B have?
- 2 What is a 16 bit IP address?
- 3 Why IPv4 is 32 bit and IPv6 is 128 bit?
- 4 How are IPv4 addresses different than IPv6 addresses?
- 5 Why is IPv4 32-bit?
- 6 What is a class B network?
- 7 Why is IPv4 only 32 bit?
- 8 How many bits does IPv6 have?
- 9 How many IP addresses are there in Class B?
- 10 How to calculate the number of blocks in an IPv4 address?
How many network IDS does a class B have?
IP Addresses
| Class | Total Network ID Bits | Possible Networks |
|---|---|---|
| A | *8 | 27 – 2 = 126 |
| B | *16 | 214 = 16,384 |
| C | *24 | 221 = 2,097,152 |
What is a 16 bit IP address?
Class B addresses: The first 16 bits of the IP address are used for the network ID. The final 16 bits are for the host ID. Class C addresses: The first 24 bits of the IP address are used for the network ID. The final 8 bits are for the host ID.
How many network bits are there in a class B IPv4 address?
16 bits
A class B network number uses 16 bits for the network number and 16 bits for host numbers. The first byte of a class B network number is in the range 128-191. In the number 129.144. 50.56, the first two bytes, 129.144, are assigned by the InterNIC, and comprise the network address.
Why IPv4 is 32 bit and IPv6 is 128 bit?
IPv6 has a vastly larger address space than the impending exhausted IPv4 address space. IPv6 increases the size of the IP address from the 32 bits that compose an IPv4 address to 128 bits. Each extra bit given to an address doubles the size of the address space.
How are IPv4 addresses different than IPv6 addresses?
IPv4 & IPv6 are both IP addresses that are binary numbers. Comparing IPv6 vs IPv4, IPv4 is 32 bit binary number while IPv6 is 128 bit binary number address. IPv4 address are separated by periods while IPv6 address are separated by colons.
What is IPv4 address?
The IPv4 address is a 32-bit number that uniquely identifies a network interface on a machine. An IPv4 address is typically written in decimal digits, formatted as four 8-bit fields that are separated by periods. Each 8-bit field represents a byte of the IPv4 address.
Why is IPv4 32-bit?
IPv4 chose 32 bit because it was the biggest register found in any common processors at the time. It was an arbitrary choice that seemed good enough at the time. When IPv4 was originally devised we all believed it was sufficiently large enough.
What is a class B network?
A Class B network was a network in which all addresses had the two most-significant bits set to 1 and 0 respectively. For these networks, the network address was given by the next 14 bits of the address, thus leaving 16 bits for numbering host on the network for a total of 65536 addresses per network.
What is an IPv4 address what are the different classes of IPv4?
In the IPv4 IP address space, there are five classes: A, B, C, D and E. Each class has a specific range of IP addresses (and ultimately dictates the number of devices you can have on your network). Primarily, class A, B, and C are used by the majority of devices on the Internet.
Why is IPv4 only 32 bit?
IPv4 chose 32 bit because it was the biggest register found in any common processors at the time. It was an arbitrary choice that seemed good enough at the time. When IPv4 was originally devised we all believed it was sufficiently large enough. Few, if any, envisioned what happened 20+ years later.
How many bits does IPv6 have?
128 bits
An IPv6 address is 128 bits in length and consists of eight, 16-bit fields, with each field bounded by a colon. Each field must contain a hexadecimal number, in contrast to the dotted-decimal notation of IPv4 addresses.
What is the difference between Class A and Class B IPv4?
In Class B, the first two bytes of the address defines the network address and the rest two bytes defines the host-id. In Class C the first three bytes defines the network address and the last byte defines the host-id. The network id of class A is defined by the first byte of the 32-bit IPv4 address.
How many IP addresses are there in Class B?
Class B has 16384 (2 14) Network addresses and 65534 (2 16 -2) Host addresses. Class B IP address format is: 10NNNNNN.NNNNNNNN.HHHHHHHH.HHHHHHHH
How to calculate the number of blocks in an IPv4 address?
As the first bit is preserved the remaining seven bits calculate the number of blocks in the class A i.e. 27= 128 blocks. There are 128 blocks in class A, as the addressing would start from 0 the range of blocks will be from 0-127. The host-id in class A is defined by the remaining three bytes of the IPv4 address which is equal to 24 bits.
What is the difference between binary and dotted decimal notation of IPv4 addresses?
The first few bits of binary notation of IPv4 addresses recognizes the class of the address whereas, in dotted-decimal notation of IPv4 address the value of the first byte recognizes the class of the address. As you can see the image below, the first byte of each class denotes the range of addresses in each class.