TCP and UDP as Transport Protocols for SANs Essay

TCP and UDP as Transport Protocols for SANsStorage Area Networks (SANs) are special-function networks that provide shared access to storage by more than one computer and server. The networks apply transport protocols to facilitate exchange of data between the computers.

Although there are various protocols, User Datagram Protocol (UDP) and Transport Control Protocol (TCP) are the two commonly used protocols, with UDP applied for small stable SANs and TCP for large unstable networks. This essays aims to compare these two protocols in terms of how they transport single and multiple transactions over SANs and how they determine success of the transmissions.Discussion            UDP is a connectionless protocol used in stable SANs to send data between two computer systems. It does this by providing a port number for the information packet to be sent to the correct upper layer program and a checksum to validate the UDP information across the network (Long, 2006, p.219). On the other hand, TCP is a connection-oriented protocol used to transport data over potentially unstable wide area SANs. This is because it establishes an exchange connection through a three-way handshake between data source and destination before transporting the information.            Both protocols provide some means of acknowledging that transmission of data was done successfully.

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UDP depends on external support to acknowledge that the datagrams were received intact. For acknowledgement, TCP has an acknowledgement sequence number in its header to ensure that data packets are delivered to the receiving application in proper order and an ACK bit set to acknowledge successful data transmission (Long, 2006, p.224).            UDP and TCP allow multiple transmission of data over SANs by assigning port numbers to particular upper layer applications.

The port number allows the receiving computer to filter the incoming frames of data so as to forward the right information to the upper layer program related to the port number.Conclusion            UDP is a connectionless protocol that provides a port number and checksum to ensure that datagrams are transported successfully over SANs. However, it lacks acknowledgement mechanisms to verify that data was received intact and as such, is commonly used in stable networks. TCP on the other hand is a connection-directed protocol that first initializes communication between sender and receiver applications before transmitting data over SANs. Its header contains strategies to acknowledge success of the transmission process and therefore, used in unstable wide area networks.ReferenceLong, J.

(2006). Storage networking protocol fundamentals. Indianapolis, IN: Cisco Press.

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