HP CP1510 manual Internet Protocol IP, Transmission Control Protocol TCP, IP address

Table 4-4IP addressing

Service name	Description
DHCP (Dynamic Host Configuration Protocol)	For automatic IP address assignment. The DHCP server
	provides the device with an IP address without requiring the
	user to intervene.
BOOTP (Bootstrap Protocol)	For automatic IP address assignment. The BOOTP server
	provides the device with an IP address after the administrator
	inputs the product MAC hardware address on the BOOTP
	server.
Auto IP	For automatic IP address assignment. If neither a DHCP
	server nor a BOOTP server is present, the product uses this
	service to generate a unique IP address.

TCP/IP

Similar to a common language that people use to communicate with each other, TCP/IP (Transmission Control Protocol/Internet Protocol) is a suite of protocols designed to define the way computers and other devices communicate with each other over a network.

Internet Protocol (IP)

When information is sent across the network, the data is broken down into small packets. Each packet is sent independently. Each packet is encoded with IP information, such as the IP address of the sender and receiver. IP packets can be routed over routers and gateways: devices that connect a network with other networks.

IP communications require no connection. When IP packets are sent, they might not arrive at their destination in the correct sequence. However, higher-level protocols and programs place the packets in the correct sequence, so IP communications are efficient.

Each node or device that communicates on the network requires an IP address.

Transmission Control Protocol (TCP)

TCP breaks the data into packets and recombines them on the receiving end by providing a connection- oriented, reliable, and guaranteed delivery service to another node on the network. When data packets are received at their destination, TCP calculates a checksum for each packet to verify that the data is not corrupt. If the data in the packet has been corrupted during transmission, TCP discards the packet and requests that the packet be resent.

IP address

Every host (workstation or node) on an IP network requires a unique IP address for each network interface. This address is a software address that is used to identify both the network and specific hosts that are located on that network. It is possible for a host to query a server for a dynamic IP address each time the device boots up (for example, using DHCP and BOOTP).

An IP address contains four bytes of information, divided into sections that each contain one byte. The IP address has the following format:

xxx.xxx.xxx.xxx

NOTE: When assigning IP addresses, always consult the IP address administrator. Setting the wrong address can disable other equipment operating on the network or interfere with communications.

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