Functionality of DHCP

Dynamic Host Configuration Protocol (DHCP). Used in server-based applications to allocate shared IP addresses to individual computers. When a client computer requires an IP address, a DHCP server assigns the client an IP address from a pool of shared addresses.

For example, a network may have 80 workstations, but only 54 IP addresses available. The DHCP allows the 80 workstations to share the 54 IP addresses in a way that is analogous to an office with 80 employees who share a phone system with only 54 trunk lines. In this scenario, it is expected that in normal operation no more than 54 employees will be on the phone at the same time. That is, the 55th employee and beyond will not be able to get onto the system.

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Socket

SOCKET :For computers to communicate over the Internet, each computer, client or server, must utilize a standard set of protocols called TCP/IP. This suite of protocols is referred to as a TCP/IP stack or socket.    
There are numerous versions of TCP/IP stack available, for every target platform and operating system (UNIX, PC, Macintosh, handheld devices, etc.). The TCP/IP stack,is composed of five layers: application, transport, Internet,data link, and physical.

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Common problems in N/W

1.Check the network connection b/w client server. Because we can not able to accessible the client-server with out connection.
2.Slow connection will make the time out process
3.Check the configuration b/w client server.
4.Firewall may also block the server -client connection.

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TCP UDP Basic

TCP is referred to as a connection-oriented protocol. Connection-oriented protocols require that a channel be established (a communications line established between the sending and receiving hosts, such as in a telephone connection) before messages are transmitted.

UDP is considered a connectionless protocol. This means that data can be sent without creating a connection to the receiving host. The sending computer simply places messages onto the network with the destination address and hopes that the messages arrive intact.

Difference: UDP does not check for dropped data. The benefit of being connectionless is that data can be transferred more quickly; the drawback is that data can more easily be lost during transmission.

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