four-octet.
A subnet mask is a four-octet number used to identify the network ID portion of a 32-bit IP address.
How many octets does a subnet mask have quizlet?
Subnet IDs are calculated via what’s known as a subnet mask. Just like an IP address, subnet masks are 32-bit numbers that are normally written now as four octets in decimal.
How many octets does an IP have?
4 octets
An IP address is, as such, generally shown as 4 octets of numbers from 0-255 represented in decimal form instead of binary form.
Is subnet mask always 255?
A subnet mask is a 32-bit number created by setting host bits to all 0s and setting network bits to all 1s.The 255 address is always assigned to a broadcast address, and the 0 address is always assigned to a network address. Neither can be assigned to hosts, as they are reserved for these special purposes.
What is the subnet mask for the last octet?
That’s the network portion of the IP address with a /24 mask. The last octet is the host portion of the IP address.
How to define the network portion of a subnet IP address.
| Bits used for mask | Default netmask | Subnet binary |
|---|---|---|
| /16 | 255.255.0.0 | 11111111.11111111.00000000.00000000 |
How many octets is the network portion of a Class C address?
three octets
Class C The first three octets denote the network address, and the last octet is the host portion. The first octet range of 192 to 223 is a Class C address. Class D Used for multicast. Multicast IP addresses have their first octets in the range 224 to 239.
Which of the following represents the octets of a Class C subnet mask?
three octets
A Class A address uses only the first octet to represent the network portion, a Class B address uses two octets, and a Class C address uses three octets.
Table 3.3. Default Subnet Masks Associated with IP Address Classes.
| Address Class | Default Subnet Mask |
|---|---|
| A | 255.0.0.0 |
| B | 255.255.0.0 |
| C | 255.255.255.0 |
How many octets are there?
The octet is a unit of digital information in computing and telecommunications that consists of eight bits.
Octet (computing)
| octet | |
|---|---|
| In primary units of information | 1 o = 8 bits |
How many octets are there in IPv4?
four octets
An IPv4 address must contain three periods and four octets. The following examples are valid IPv4 addresses: 1 .
What are network octets?
In computer and network technology, an octet represents an 8-bit quantity. Octets range in mathematical value from 0 to 255. The term octet is also used in other contexts, such as musical performance, to refer to a group of eight people or parts.
What should my netmask be?
Most home networks use the default subnet mask of 255.255. 255.0. However, an office network may be configured with a different subnet mask such as 255.255.This is the default subnet mask used by Class B networks and provides up to 65,536 IP addresses (256 x 256).
What does a subnet mask of 255.255 255.0 mean?
A class C network would have a subnet mask of 255.255. 255.0 which means that 24 bits are used for the network. In CIDR notation this is designated by a /24 following the IP address.
What is a 255.255 0.0 subnet?
Understanding Networks and Networked Video
It is a 32-bit number that distinguishes each octet in the IP address. For example, as depicted in Table 4.9, 255.255. 0.0 is a standard Class B subnet mask, since the first two bytes are all ones (network) and the last two bytes are all zeros (host).
How many IPS is a 16?
Subnet Cheat Sheet 24 Subnet Mask, 30, 26, 27, 29, and other IP Address CIDR Network References
| CIDR | Subnet mask | # of IP addresses |
|---|---|---|
| /16 | 255.255.0.0 | 65,536 |
| /15 | 255.254.0.0 | 131,072 |
| /14 | 255.252.0.0 | 262,144 |
| /13 | 255.248.0.0 | 524,288 |
What does 16 mean in IP address?
An /16 is usually used to indicate the number of bits that are fixed (would not change) in a range of addresses of a network. That is a simpler syntax to express the CIDR. Having an IP number as 1.2. 255.1/16 means that any address from 1.2. 0.0 up to 1.2.
How many bits does IPv4 have?
32-bit
IPv4 addresses are 32-bit numbers that are typically displayed in dotted decimal notation and contains two primary parts: the network prefix and the host number.
How many octets are used to define the network portion of the IP address in a Class A network quizlet?
Terms in this set (18) allow hosts to participate on IP based networks and it is a 32-bit binary number represented as four octets (four 8-bit numbers). Each octet is separated by a period. is a 32-bit number that is associated with each IP address that identifies the network portion of the address.
How many octets are in IPv6?
128
The IPv6 address size is 128-bits long, or 16 8-bit octets. This represents an astronomical increase in address size from 4,294,967,296 seen in IPv4 to over 340 trillion, trillion, trillion. That’s enough addresses for many trillions of addresses to be assigned to every person on Earth.
What are the first 3 octets of an IP address?
The first 24 bits (the first three octets) identify the network and the remaining 8 bits indicate the host within the network. An example of a Class C IP address is 200.168. 212.226 where 200.168. 212 identifies the network and 226 identifies the host on that network.
How many networks are there in Class C?
2,097,152
Classful addressing definition
| Class | Leading bits | Number of networks |
|---|---|---|
| Class A | 0 | 128 (27) |
| Class B | 10 | 16,384 (214) |
| Class C | 110 | 2,097,152 (221) |
| Class D (multicast) | 1110 | not defined |
What is the default subnet mask of Class B?
255.255.0.0
Consequently, the default subnet mask for Class B is 255.255. 0.0. In addition, Class C IP addresses are normally assigned to a very small-sized network. Their IP addresses range from 192 to 233 and their default subnet mask is 255.255.
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