A number that uniquely identifies each computer or device connected to the internet.

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Gary P.

AP CS

5 months ago

Every machine on the internet has a unique identifying number, called an IP address. The IP stands for Internet Protocol, which is one of two protocols that computers use to communicate over the internet. The other is Transmission Control Protocol, and the two are often referred to as one in the phrase TCP/IP. A protocol is the predefined way that someone who wants to use a service connects with that service. The "someone" could be a person, but more often it is a computer program like a web browser.

A typical IP version 4 (IPv4) address looks like this: 216.27.61.137.

To make it easier for us humans to remember, IP addresses are normally expressed in decimal format as a dotted decimal number like the one above. But computers communicate in binary form. Look at the same IPv4 address in binary: 11011000.00011011.00111101.10001001.

Each sequence of numbers in an IPv4 address is called an octet, because each has eight positions when viewed in binary form. If you add all the positions together, you get 32, because IPv4 addresses are considered 32-bit numbers. Since each of the eight positions can have two different states (1 or 0), the total number of possible combinations per octet is 28 or 256. So, each octet can contain any value between zero and 255. Combine the four octets and you get 232 or a possible 4,294,967,296 unique values!

Out of the almost 4.3 billion possible combinations in IPv4 addresses, certain values are restricted from use as typical IP addresses. For example, the IP address 0.0.0.0 is reserved for machines on the local network and the address 255.255.255.255 is used for broadcasts.

Although 4.3 billion sounds like a lot of addresses, the internet has grown so fast that a newer 128-bit address system was needed to replace IPv4. The experts at the Internet Engineering Task Force (IETF) began working on a new system in late 1998. IP version 6 (IPv6), which officially launched on June 6, 2012, has room for 340 trillion3 addresses, so we should have plenty of room for all our devices. (For now.) Just for the record IPv5 was never formally adopted as a standard.

As you might expect, IPv6 addresses look a little different from IPv4, which was created in the 1970s. Each segment in an IPv6 address uses four numbers and is separated by a colon.

An example looks like this: ba5a:9a72:4aa5:522e:b893:78dd:a6c4:f033.

Because IPv6 uses hexadecimal notation, there are 16 individual digits that need to be represented. So besides the numbers zero through nine, the letters A-F have been drafted to stand in for the double-digit numbers.

Sticking with IPv4 for the moment, octets serve a purpose other than simply separating the numbers. They are used to create classes of IP addresses that can be assigned to a particular business, government or other entity based on size and need. The octets are split into two sections: network and host. The first octet is used to identify the network that a computer belongs to. Host (sometimes referred to as node) identifies the actual computer on the network. The last octet shows the host segment. There are five IP classes plus certain special addresses. You can learn more about IP classes at What Is an IP Address?

The numerical sequence that serves as an identifier for an Internet server. An IP address appears as a series of four groups of numbers separated by dots. The first group is a number between 1 and 255 and the other groups are a number between 0 and 255, such as 192.135.174.1. Every server has its own unique address.

The definition of an IP address is a decimal number that defines the routing information of the Internet user. The address is composed of four sets of numbers, each separated by a decimal point.

An example of an IP address is 123.123.12.1.

A binary number that uniquely identifies a host computer connected to the Internet. The IP packet header provides an originating address field so that a host can identify itself as the originator of a packet. The IP packet header also provides a destination address field so that an originating host can identity the target host for which a packet is intended. Based on that information, the Internet routers can act to deliver the packet to the target host, which can respond to the originating host, as appropriate. All IP addresses are written in dotted decimal notation. An IPv4 address, for example, comprises 4 fields separated by dots and expressed as xxx.xxx.xxx.xxx, with each field given a value in decimal notation of 0

An identifier required for any machine to communicate on the Internet. The IP address looks something like this: 123.123.123.123—for numerical segments separated by dots. Any computer is reachable through its IP address. An IP address is divided into a part identifying a network as belonging to a university, a government agency, or a company and another part identifying each computer in that network. The IP address is comparable to a “nonvirtual” street address with its street name and house number.

(Internet) A number assigned to each computer's or other device's network interface(s) which are active on a network supporting the Internet Protocol, in order to distinguish each network interface (hence each networked device) from every other network interface anywhere on the network.

• Short for Internet Protocol address.

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Gary P.

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3 months, 1 week ago

Every machine on the internet has a unique identifying number, called an IP address. The IP stands for Internet Protocol, which is one of two protocols that computers use to communicate over the internet. The other is Transmission Control Protocol, and the two are often referred to as one in the phrase TCP/IP. A protocol is the predefined way that someone who wants to use a service connects with that service. The "someone" could be a person, but more often it is a computer program like a web browser.

A typical IP version 4 (IPv4) address looks like this: 216.27.61.137.

To make it easier for us humans to remember, IP addresses are normally expressed in decimal format as a dotted decimal number like the one above. But computers communicate in binary form. Look at the same IPv4 address in binary: 11011000.00011011.00111101.10001001.

Each sequence of numbers in an IPv4 address is called an octet, because each has eight positions when viewed in binary form. If you add all the positions together, you get 32, because IPv4 addresses are considered 32-bit numbers. Since each of the eight positions can have two different states (1 or 0), the total number of possible combinations per octet is 28 or 256. So, each octet can contain any value between zero and 255. Combine the four octets and you get 232 or a possible 4,294,967,296 unique values!

Out of the almost 4.3 billion possible combinations in IPv4 addresses, certain values are restricted from use as typical IP addresses. For example, the IP address 0.0.0.0 is reserved for machines on the local network and the address 255.255.255.255 is used for broadcasts.

Although 4.3 billion sounds like a lot of addresses, the internet has grown so fast that a newer 128-bit address system was needed to replace IPv4. The experts at the Internet Engineering Task Force (IETF) began working on a new system in late 1998. IP version 6 (IPv6), which officially launched on June 6, 2012, has room for 340 trillion3 addresses, so we should have plenty of room for all our devices. (For now.) Just for the record IPv5 was never formally adopted as a standard.

As you might expect, IPv6 addresses look a little different from IPv4, which was created in the 1970s. Each segment in an IPv6 address uses four numbers and is separated by a colon.

An example looks like this: ba5a:9a72:4aa5:522e:b893:78dd:a6c4:f033.

Because IPv6 uses hexadecimal notation, there are 16 individual digits that need to be represented. So besides the numbers zero through nine, the letters A-F have been drafted to stand in for the double-digit numbers.

Sticking with IPv4 for the moment, octets serve a purpose other than simply separating the numbers. They are used to create classes of IP addresses that can be assigned to a particular business, government or other entity based on size and need. The octets are split into two sections: network and host. The first octet is used to identify the network that a computer belongs to. Host (sometimes referred to as node) identifies the actual computer on the network. The last octet shows the host segment. There are five IP classes plus certain special addresses. You can learn more about IP classes at What Is an IP Address?

Try the new Google Books

Check out the new look and enjoy easier access to your favorite features

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The numerical sequence that serves as an identifier for an Internet server. An IP address appears as a series of four groups of numbers separated by dots. The first group is a number between 1 and 255 and the other groups are a number between 0 and 255, such as 192.135.174.1. Every server has its own unique address.

The definition of an IP address is a decimal number that defines the routing information of the Internet user. The address is composed of four sets of numbers, each separated by a decimal point.

An example of an IP address is 123.123.12.1.

A binary number that uniquely identifies a host computer connected to the Internet. The IP packet header provides an originating address field so that a host can identify itself as the originator of a packet. The IP packet header also provides a destination address field so that an originating host can identity the target host for which a packet is intended. Based on that information, the Internet routers can act to deliver the packet to the target host, which can respond to the originating host, as appropriate. All IP addresses are written in dotted decimal notation. An IPv4 address, for example, comprises 4 fields separated by dots and expressed as xxx.xxx.xxx.xxx, with each field given a value in decimal notation of 0

An identifier required for any machine to communicate on the Internet. The IP address looks something like this: 123.123.123.123—for numerical segments separated by dots. Any computer is reachable through its IP address. An IP address is divided into a part identifying a network as belonging to a university, a government agency, or a company and another part identifying each computer in that network. The IP address is comparable to a “nonvirtual” street address with its street name and house number.

(Internet) A number assigned to each computer's or other device's network interface(s) which are active on a network supporting the Internet Protocol, in order to distinguish each network interface (hence each networked device) from every other network interface anywhere on the network.

• Short for Internet Protocol address.

Every machine on the internet has a unique identifying number, called an IP address. The IP stands for Internet Protocol, which is one of two protocols that computers use to communicate over the internet. The other is Transmission Control Protocol, and the two are often referred to as one in the phrase TCP/IP. A protocol is the predefined way that someone who wants to use a service connects with that service. The "someone" could be a person, but more often it is a computer program like a web browser.

A typical IP version 4 (IPv4) address looks like this: 216.27.61.137.

To make it easier for us humans to remember, IP addresses are normally expressed in decimal format as a dotted decimal number like the one above. But computers communicate in binary form. Look at the same IPv4 address in binary: 11011000.00011011.00111101.10001001.

Each sequence of numbers in an IPv4 address is called an octet, because each has eight positions when viewed in binary form. If you add all the positions together, you get 32, because IPv4 addresses are considered 32-bit numbers. Since each of the eight positions can have two different states (1 or 0), the total number of possible combinations per octet is 28 or 256. So, each octet can contain any value between zero and 255. Combine the four octets and you get 232 or a possible 4,294,967,296 unique values!

Out of the almost 4.3 billion possible combinations in IPv4 addresses, certain values are restricted from use as typical IP addresses. For example, the IP address 0.0.0.0 is reserved for machines on the local network and the address 255.255.255.255 is used for broadcasts.

Although 4.3 billion sounds like a lot of addresses, the internet has grown so fast that a newer 128-bit address system was needed to replace IPv4. The experts at the Internet Engineering Task Force (IETF) began working on a new system in late 1998. IP version 6 (IPv6), which officially launched on June 6, 2012, has room for 340 trillion3 addresses, so we should have plenty of room for all our devices. (For now.) Just for the record IPv5 was never formally adopted as a standard.

As you might expect, IPv6 addresses look a little different from IPv4, which was created in the 1970s. Each segment in an IPv6 address uses four numbers and is separated by a colon.

An example looks like this: ba5a:9a72:4aa5:522e:b893:78dd:a6c4:f033.

Because IPv6 uses hexadecimal notation, there are 16 individual digits that need to be represented. So besides the numbers zero through nine, the letters A-F have been drafted to stand in for the double-digit numbers.

Sticking with IPv4 for the moment, octets serve a purpose other than simply separating the numbers. They are used to create classes of IP addresses that can be assigned to a particular business, government or other entity based on size and need. The octets are split into two sections: network and host. The first octet is used to identify the network that a computer belongs to. Host (sometimes referred to as node) identifies the actual computer on the network. The last octet shows the host segment. There are five IP classes plus certain special addresses. You can learn more about IP classes at What Is an IP Address?

A server is a computer or system that provides resources, data, services, or programs to other computers, known as clients, over a network.

Internet Protocol (IP) is the method or protocol by which data is sent from one computer to another on the internet. Each computer -- known as a host -- on the internet has at least one IP address that uniquely identifies it from all other computers on the internet.

IP address stands for internet protocol address; it is an identifying number that is associated with a specific computer or computer network. When connected to the internet, the IP address allows the computers to send and receive information.

The IP address is a 32-bit number that uniquely identifies a network interface on a machine. An IP address is typically written in decimal digits, formatted as four 8-bit fields separated by periods.