An IP address is a unique series of numbers that identify a specific computer, and so allows it to communicate with other computers across the internet. An IP address is made up of four numbers, each ranging from 0 to 255, separated by periods (called a dotted-quad). So, an IP address can look like 1.0.1.1 or 125.234.04.157. IP stands for Internet Protocol, which is a set of laws dictating internet behaviour and allowing the completion of actions on the World Wide Web (WWW).
IP addresses are usually assigned to internet service providers and so activities done on a computer can be traced back to it, pinpointing that computer to, at minimum, a general location (city, for example).
IP addresses can sometimes be given hostnames so that it can be remembered more easily and used in colloquial situations.
Think of IP addresses as electronic mail addresses. Not like an email account that can be accessed from most computers in the world but like your computer is your house, the IP address is your mail box, and the internet is the international postal service. :)
Thursday, January 26, 2012
What is an IPv4?
An IPv4 uses 32 binary bits to make a single unique address on the network. It’s expressed by four numbers separated by dots. Each number is the decimal representation for an eight-digit binary number, also called an octet.
IPv6
IPv6
-Version of the Internet Protocol(IP) intended to succeedIPv4, which currently directs almost all internet traffic, but it is runningout of addresses.
-It is alsocalled IPng (IP next generation)
Comparison toIPv4
- Larger address space
- Thelength of an IPv6 address is 128bits, compared to 32bits in IPv4.
- Therefore, it is now possible to support 2^128unique IP addresses, a substantial increase in number of computers that can beaddressed with the help of IPv6 addressing scheme.
- Stateless address auto configuration (SLAAC)
- Thisfeature allows IPv6 host to configure automatically when connected to a routedIPv6 network.
- Mandatory network-layer security
- Internet protocol security (IPsec) was originally developed for IPv6, but found widespread deploymentfirst in IPv4, into which it was back-engineered. IPsec is an integral part ofthe base protocol suite in IPv6. IPsec is mandatory in IPv6, but optional forIPv4.
- Better mobility support
Wednesday, January 25, 2012
Let's Talk About TCP/IP
Introduction
TCP/IP stands for Transmission Control Protocol / Internet Protocol. TCP/IP is the communication protocol for communication between computers on the Internet. A computer communication protocol is a description of the rules computers must follow to communicate with each other.
TCP/IP defines how electronic devices (like computers) should be connected to the Internet, and how data should be transmitted between them.
TCP takes care of the communication between application software (i.e. browser) and network software. IP takes care of the communication with other computers.
TCP is responsible for breaking data down into IP packets before they are sent, and for assembling the packets when they arrive. IP is responsible for sending the packets to the correct destination. TCP/IP uses 32 bits, or four numbers between 0 and 255, to address a computer.
How Does TCP/IP Work?
The TCP/IP model consists of the Network layer, the Internet layer, the transport layer and the application layer. Each layer consists of a set of protocols that function on the level of that layer, and is responsible for performing certain operations on the data it receives and passing it to the higher layers. They each deal with certain issues related to the transmission of data and renders certain services to its higher layers.
The network layer protocols are responsible for connecting the nodes in a network.
The Internet layer consists of protocols, specifications and methods that are used to transport data packets across the network.
The transport layer protocols deal with the transmission of data packets between source and destination network hosts.
The application layer, the topmost layer in TCP/IP, directly interacts with application services. Also, TCP/IP functions at all the levels of communication between the components of a network.
TCP/IP stands for Transmission Control Protocol / Internet Protocol. TCP/IP is the communication protocol for communication between computers on the Internet. A computer communication protocol is a description of the rules computers must follow to communicate with each other.
TCP/IP defines how electronic devices (like computers) should be connected to the Internet, and how data should be transmitted between them.
TCP takes care of the communication between application software (i.e. browser) and network software. IP takes care of the communication with other computers.
TCP is responsible for breaking data down into IP packets before they are sent, and for assembling the packets when they arrive. IP is responsible for sending the packets to the correct destination. TCP/IP uses 32 bits, or four numbers between 0 and 255, to address a computer.
How Does TCP/IP Work?
The TCP/IP model consists of the Network layer, the Internet layer, the transport layer and the application layer. Each layer consists of a set of protocols that function on the level of that layer, and is responsible for performing certain operations on the data it receives and passing it to the higher layers. They each deal with certain issues related to the transmission of data and renders certain services to its higher layers.
The network layer protocols are responsible for connecting the nodes in a network.
The Internet layer consists of protocols, specifications and methods that are used to transport data packets across the network.
The transport layer protocols deal with the transmission of data packets between source and destination network hosts.
The application layer, the topmost layer in TCP/IP, directly interacts with application services. Also, TCP/IP functions at all the levels of communication between the components of a network.
Subscribe to:
Posts (Atom)