Differentiate transport Layers to data link

Differentiate transport Layers to data link

1. Error control at data link versus error control at transport layer.

Solution:-Error Control:-Data link layer adds reliability to physical layer by adding mechanisms to detect and retransmit lost or damaged frames. Also uses a mechanism to prevent duplication of frames. Error Control bits are added to the form in the TRAILER

At Transport layer Flow Control:-Like Data link layer, Transport layer is also responsible for Flow control. Flow control is performed end-to-end rather than across a single link.

At Transport layer Error Control:-Like data link layer, Transport layer is responsible for the Error Control. Error control is performed end-to-end. This layer makes sure that entire message reaches Rx Transport layer w/o error. Error can be a result of Lost, damaged or duplicated data and usually Re Transmission is done.

2. Addressing at Data link versus addressing at Transport layer.

Solution:-Addressing at Data link layers also termed as physical or hardware addressing. It is commonly written in hexadecimal format and is of 48 bit and has six parts instead of four as in case of IP address (0C.AB.12.7A.6b.54). This is manufacture address and is used within a network or intra network address (LAN).We perform address binding to convert Physical address into IP address or vice versa.

Addressing at transport layers also called as service point addressing Computers run several programs at the same time. Source-to-Destination delivery means delivery not only from only from one computer to the other but also from a specific process on one computer to a specific process on the other. Transport layer header includes a type of address called Service Point Address or PORT Address. Network layer each packet to the correct computer while Transport layer gets entire message to the correct process on that computer.

3. Source to destination delivery at network versus transport layers.

In case of network layer the source to destination delivery is in term of individual packet delivery from the sender to destination device. And in case of transport layer this delivery is in term of entire message from sender to destination host. The transport layer is responsible for the entire message safe delivery from source to destination computer.