Tag: Transport layer Ports

You can take this quiz online at http://www.net-intro.com/quiz/ What is the primary problem the Transport (TCP) layer is supposed to solve? a) Move packets across multiple hops from a source to destination computer b) Move packets across a single physical connection c) Deal with lost and out-of-order packets d) Deal with encryption of sensitive data…

acknowledgement: When the receiving computer sends a notification back to the source computer indicating that data has been received. buffering: Temporarily holding on to data that has been sent or received until the computer is sure the data is no longer needed. listen: When a server application is started and ready to accept incoming connections…

In a sense, the purpose of the Transport layer is to compensate for the fact that the Link and Internetworking layers might lose data. When the two lower layers lose or reroute packets, the Transport layer works to reassemble and/or retransmit that data. The existence of the Transport layer makes it possible for the two…

When a client application wants to make a connection to a remote computer, it is important that the connection is made to the correct server application on that remote computer. A remote computer might have any number of different server applications running at the same time. Example server applications would include: • Web Server• Video…

The purpose of the Transport layer is to provide reliable connections between networked applications so those applications can send and receive streams of data. For an application, this is as simple as asking the Transport layer to make a connection to an application running on a remote host. We call the application that initiates the…

One of the key elements of the Transport layer is that the sending computer must hold on to all of the data it is sending until the data has been acknowledged. Once the receiving computer acknowledges the data, the sending computer can discard the sent data. We can look at this graphically when a message…

As the destination computer receives the packets, it looks at the offset position from the beginning of the message so it can put the packet into the proper place in the reassembled message. Simply by making sure to put the packet data at the correct position relative to the beginning of the message, the Transport…

If you were to look at a packet going across one of many links between its source and destination computers, you would see a link header, an IP header, and a Transport Control Protocol (TCP) header, along with the actual data in the packet. The link header is removed when the packet is received on…

The next layer up from the Internetworking layer is the Transport layer. A key element of the Internetworking layer is that it does not attempt to guarantee delivery of any particular packet. The Internetworking layer is nearly perfect, but sometimes packets can be lost or misrouted. But users of the network want to reliably send…