Transport Layer

1237
Application Layer / Transport Layer
Application Layer / Transport Layer

The application layer is where network applications and their application-layer protocols reside. The internet's application layer contains many protocols, such as the HTTP protocol (which provides for Web document request and transfer), SMTP (which provides for the transfer

Tags application layer, transport layer, network application
1436
Network Layer / Link Layer
Network Layer / Link Layer

The Internet's network layer is responsible for moving network-layer packets known as datagrams from one host to another. The Internet transport-layer protocol (TCP or UDP) in a source host passes, a transport-layer segment and a destination address to the network layer,

Tags network layer, transport layer, link layer
2381
Transport Layer
Transport Layer

Residing between the application and network layers, the transport layer is the most important part of the layered network architecture. It has the critical role of providing communication services directly to the application processes running on different hosts. The pedagogic

Tags network layer, transport layer, internet protocol, end system, transmission rate, logical communication, segments
5460
Multiplexing and Demultiplexing
Multiplexing and Demultiplexing

In this section we discuss transport-layer multiplexing and demultiplexing, that is, extending the host-to-host delivery service provided by the network layer to a process-to-process delivery service for applications running on the hosts. In order to keep the discussion concrete, we'll

Tags network layer, host, transport layer, socket, application protocol
1755
Principles of Reliable Data Transfer
Principles of Reliable Data Transfer

In this section, we look at the problem of reliable data transfer in a general context. This is appropriate since the problem of implementing reliable data transfer takes place not only at the transport layer, but also at the link layer and the application layer as well. The common

Tags data transfer, transport layer, link layer, application layer, unidirectional data transfer
4649
Building a Reliable Data Transfer Protocol
Building a Reliable Data Transfer Protocol

We first examine the simplest case, in which the underlying channel is completely reliable. The protocol itself, which we'll call rdt1.0, is trivial. The finite-state machine (FSM) definitions for the rdt1.0 sender and receiver are shown in Figure 1. The FSM in Figure 1(a) defines the

Tags protocol, fsm, arq, data packet, countdown timer, checksums, data transfer, transport layer
1709
The Network Layer
The Network Layer

We know that the transport layer provides many forms of process-to-process communication by relying on the network layers host-to-host communication service. We also know that the transport layer does so without any knowledge about how the network layer in fact implements

Tags network layer, router, transport layer, segments, datagram, routing algorithms, forwarding table, packet switch
2071
Network Service Models
Network Service Models

Before looking into the network layer, let's take the wider view and examine the different types of service that might be offered by the network layer. When the transport layer at a sending host transmits a packet into the network (that is, passes it down to the network layer at

Tags network layer, transport layer, end systems
1707
IP Datagram Fragmentation
IP Datagram Fragmentation

Well study in "The Link Layer and Local Area Networks" that not all link-layer protocols can carry network-layer packets of the same size. Some protocols can carry big datagrams, whereas other protocols can carry only little packets. For instance, Ethernet frames can carry up to

Tags maximum transmission unit, router, forwarding table, fragment, transport layer, ip datagram
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