Is a full duplex, communication is established.
UDP is another protocol of transport layer layer four, used primarily for establishing low latency
and loss, tolerating connections between applications on the Internet, TCP has emerged as a dominant
protocol used for the bulk of Internet connectivity owing to its services for breaking large data sets
into individual packets, checking for and resending lost packets and reassembling packets into the
correct sequence.
But these additional services come at a cost in terms of additional data overhead and delays called
latency.
In contrast, UDP just sends the packets, which means that it has a much lower bandwidth overhead and
latency, but packets can be lost or received out of order as a result owing to the different paths
individual packets traverse between center and receiver.
So UDP uses a simple connection, less communication model with a minimum of protocol mechanism.
It has no handshaking dialogues and thus exposes the users program to any unreliability of the underlying
network.
There is no guarantee of delivery, ordering or duplicate protection.
UDP is suitable for purposes where error, checking and correction are either not necessary or are performed
in the application.
UDP is an ideal protocol for network applications in which perceive latency is critical, such as gaming
voice and video communications, which can sever some data loss without adversely affecting perceived
quality.
In addition, since it's transaction oriented suitable for simple query response protocols such as the
domain name system or the network time protocol, the UDP header is pretty simple.
It consists of four fields, each of which is two bytes.
Sixteen bits.
The use of the fields checksum and Searsport is optional and IPV for.
Are you surprised to hear that the Searsport is optional?
But don't be because as you know, UDP packet does not expect to get a reply in general.
And again, since UDP doesn't care about the errors, the checksum field is again optional.
Searsport identifies as Henders Port and the destination port identifies the receiver's port as well.
And the Langfield specifies the length of the UDP header and data in bytes, so now's a good time to
compare the two protocols, UDP and TCP as a brief summary.
Most services on the Internet use either TCP or UDP, which are carried end to end across the network
using IP, either IP four or IPV six.
The Transmission Control Protocol TCP and User Data Graham Protocol UDP are very different.
TCP is a connection oriented protocol which tries to ensure reliable in order delivery of packets.
If packets are lost, TCP automatically retransmit them, if they arrive out of order, TCP will resequence
them before handing them up to an application.
UDP is Connexions, the UDP software makes no attempt to associate streams of packets together, so
as far as UDP is concerned, each packet is completely independent, unrelated to other packet.
No attempt is made by UDP for retransmission or resequencing.
If a packet is lost via UDP, it's up to the higher layer application to resend it.