The following figure illustrates the steps in converting the 32 bits of an IP address into the familiar dotted decimal notation:Īn IP address is a logical address for the network layer of the host connected to the network. Thirdly, the octets are converted into a decimal number for easier identification, and the IP address takes the form A.B.C.D. Secondly, the IP address is represented in a doted decimal notation, meaning that the four octets are separated by a decimal between them, which is read as a dot while reading the address. Remembering a 32-bit IP address would be a nightmare, so the address is represented as a dotted decimal notation.įirstly, the 32 bits are grouped into four octets having 8 bits each. We will focus on IPv4 in this book.Īn IP address is a 32-bit identifier that uniquely identifies an endpoint on an IP network. Two versions of IP are currently in use: IPv4 and IPv6. Since IP addressing design is critical to any network, we will start with a quick recap of IP addressing and then delve into the considerations for IP address planning for networks.Īn IP address is a logical identifier for an interface that is connected to the network. ![]() Every interface that is connected to the network needs to have an IP address for identification. Recall that a primary function of layer 3 is routing of packets across different subnets. As discussed in the previous chapters, Internet Protocol (IP) is a layer 3 protocol.
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