Just as you use addresses to identify the specific locations of homes and businesses so that mail can reach them efficiently, you use IP addresses to identify the location of specific devices on a network so that data can be sent correctly to those locations. IP addressing has various aspects, including the calculations for constructing an IP address, the classes of IP addresses designated for specific routing purposes, and public versus private IP addresses.
Learning how IP addresses are structured and how they function in the operation of a network provides an understanding of how data is transmitted through Layer 3 internetworking devices using TCP/IP. To facilitate the routing of packets over a network, the TCP/IP protocol suite uses a 32-bit logical address known as an IP address. This address must be unique for each device in the internetwork.
The header of the Internet layer of TCP/IP is known as the IP header.Note that each IP datagram carries this header, which includes a source IP address anddestination IP address that identify the source and destination network and host.
An IP address is a hierarchical address, and it consists of two parts:
Learning how IP addresses are structured and how they function in the operation of a network provides an understanding of how data is transmitted through Layer 3 internetworking devices using TCP/IP. To facilitate the routing of packets over a network, the TCP/IP protocol suite uses a 32-bit logical address known as an IP address. This address must be unique for each device in the internetwork.
The header of the Internet layer of TCP/IP is known as the IP header.Note that each IP datagram carries this header, which includes a source IP address anddestination IP address that identify the source and destination network and host.
An IP address is a hierarchical address, and it consists of two parts:
■ The high order, or leftmost, bits specify the network address component (network ID) of the address.
■ The low order, or rightmost, bits specify the host address component (host ID) of the address.
Every physical or virtual LAN on the corporate internetwork is seen as a single network that must be reached before an individual host within that company can be contacted.Each LAN has a unique network address. The hosts that populate that network share those same bits, but each host is identified by the uniqueness of the remaining bits. Like a group of houses along the same road, the street address is the same, but the house number is unique.
■ The low order, or rightmost, bits specify the host address component (host ID) of the address.
Every physical or virtual LAN on the corporate internetwork is seen as a single network that must be reached before an individual host within that company can be contacted.Each LAN has a unique network address. The hosts that populate that network share those same bits, but each host is identified by the uniqueness of the remaining bits. Like a group of houses along the same road, the street address is the same, but the house number is unique.
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