0 to 126.
Table 2-1 IP Addresses Available to Internet Hosts
| Address Class | First Octet Range | Number of Possible Networks |
|---|---|---|
| Class A | 0 to 126 | 127 (2 are reserved) |
| Class B | 128 to 191 | 16,384 |
| Class C | 192 to 223 | 2,097,152 |
What is the valid range of a Class A network address?
The Class A range is 0-127 in the first byte. Only 1-126 can be used to identify Class A networks because 0 and 127 are reserved. To find the valid host addresses in a Class A network, you must find the network and broadcast address in the IP range.
What is the range of values for the first octet for Class A IP networks?
Designing Your IP Addressing Scheme
| Network Class | Byte 1 Range | Byte 3 Range |
|---|---|---|
| A | 0-127 | 1-254 |
| B | 128-191 | 1-254 |
| C | 192-223 | Preassigned by Internet |
What is 1st octet?
In a class A address, the first octet is the network portion, so the class A address of, 10.1. 25.1, has a major network address of 10. Octets 2, 3, and 4 (the next 24 bits) are for the hosts. Class A addresses are used for networks that have more than 65,536 hosts (actually, up to 16,581,375 hosts!).
How many addresses are in Class A?
IP address classes
| Class | Leading bits | Total addresses in class |
|---|---|---|
| Class A | 0 | 2,147,483,648 (231) |
| Class B | 10 | 1,073,741,824 (230) |
| Class C | 110 | 536,870,912 (229) |
| Class D (multicast) | 1110 | 268,435,456 (228) |
What is the valid range used for a class C private IP address?
192.168.0.0 to 192.168.255.255
Class C: 192.168. 0.0 to 192.168. 255.255.
What are valid IP addresses?
A valid IP address must be in the form of A.B.C.D, where A,B,C and D are numbers from 0-255. The numbers cannot be 0 prefixed unless they are 0. Example: Given 25525511135, return [255.255.11.135, 255.255.111.35]. (
How can you tell if an IP address is valid or invalid?
An IP address is considered valid or invalid based on the subnet mask of the network. A network contains a network ID, the usable(host) IP range and a broadcast ID. The Network ID and Broadcast ID cannot be used and this network ID and Broadcast IDs are determined by its subnet mask.
What is the first valid host on the subnetwork that the node?
Subnetting Questions
| Question | Answer |
|---|---|
| What is the first valid host on the subnetwork that the node 172.26.185.172/24 belongs to? | 172.26.185.1 |
| What is the broadcast address of the network 172.19.166.0 255.255.255.0? | 172.19.166.255 |
What does 255 mean in a subnet mask?
A subnet mask is a 32-bit number created by setting host bits to all 0s and setting network bits to all 1s. In this way, the subnet mask separates the IP address into the network and host addresses. The 255 address is always assigned to a broadcast address, and the 0 address is always assigned to a network address.
How do you read IP ranges?
CIDR notation is written as the IP address, a slash, and the CIDR affix (for example, the IPv4 ” 10.2. 3.41/24 ” or IPv6 ” a3:b:c1:d:e:f:1:21/24 “). The CIDR affix is the number of starting digits every IP address in the range have in common when written in binary. For example: ” 10.10.
What is the first usable IP address of subnet 192.168 1.0 24?
1.1 is the first usable host address on that subnet. The /24 simply indicates that the subnet in the host should be using a mask of 255.255. 255.0. 192.168.
What is the address range of a Class A network address in binary?
Address Ranges: Class A, B and C networks:
| Address Class | Binary Address Must Begin With | Excluded Addresses |
|---|---|---|
| A | 0 | 10.0.0.0 to 10.255.255.255 127.0.0.0 to 127.255.255.255 |
| B | 10 | 172.16.0.0 to 127.255.255.255 |
| C | 110 | 2.168.0.0 to 192.168.255.255 |
What is the starting address range of a class B network address in binary?
The range of a Class B network address is 128-191 . This makes our binary range 10xxxxxx .
What are the different classes of IP addresses and give the range of each class?
IP address classes
| Class | Address range |
|---|---|
| Class A | 1.0.0.1 to 126.255.255.254 |
| Class B | 128.1.0.1 to 191.255.255.254 |
| Class C | 192.0.1.1 to 223.255.254.254 |
| Class D | 224.0.0.0 to 239.255.255.255 |
How do you calculate the number of networks in a Class A?
The total number of networks a class address may have is calculated by subtracting the number of bits in the subnet mask from the number of bits used to determine which class of network it is. For example, a class A network has an 8-bit subnet mask. Only 1 bit is used to determine that it is a class A network.
What is range of private IP address?
Summarizing the differences between private and public IP addresses
| Public IP address | Private IP address |
|---|---|
| Not free | Free |
| Any number not included in the reserved private IP address range Example: 8.8.8.8. | 10.0.0.0 10.255.255.255; 172.16.0.0 172.31.255.255; 192.168.0.0 192.168.255.255 Example: 10.11.12.13 |
What is a 24 IP range?
Subnet Cheat Sheet 24 Subnet Mask, 30, 26, 27, 29, and other IP Address CIDR Network References
| CIDR | Subnet mask | # of IP addresses |
|---|---|---|
| /26 | 255.255.255.192 | 64 |
| /25 | 255.255.255.128 | 128 |
| /24 | 255.255.255.0 | 256 |
| /23 | 255.255.254.0 | 512 |
What is a 10.0 0.0 IP address?
IP Address (10.0. 0.0) – It is the global addressing scheme used under Internet Protocol.The IP addresses are allocated to each device and are unique. IP addresses are 32-bit numbers with every 8 bits separated by a decimal.
Is 255 a valid IP address?
A standard Class C network consists of 256 addresses (0 to 255 inclusive), of which one is the network address (.Valid (or usuable) ip addresses would be 192.168. 0.1 to 192.168.
Is an IP address of 0.0 0.0 valid?
0.0 as a reserved, special-purpose address for “this host, this network.” Its IPv6 equivalent is expressed as ::/0. Although 0.0. 0.0 is valid address syntax, a client device using it as a source IP address cannot communicate on a network. IPv4 address numbers start with 0.0.
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