Nt1330 Unit 1 Study Guide

The fifth layer is the session layer this establishes a connection,this layer makes and sets up the connection using co ordinates and could terminate conversations links. the session layer produces services that make authentication after an interruption and not only that but it can reconnect.and as well as the transporting layer it can also have the TCP and the UDP can provide services for all most all applications.An application layer is an abstraction layer that specifies the shared protocols and interface methods used by hosts in a communications network. The application layer abstraction is used in both of the standard models of computer networking; the Internet Protocol Suite (TCP/IP) and the Open Systems Interconnection model (OSI model).Although both models use the same term for their respective highest level layer, the detailed definitions and purposes are different.In TCP/IP, the application layer contains the communications protocols and interface methods used in process-to-process communications

• “Application - The Application Layer is the layer that most network users are exposed to, and is the level at which human communication happens. HTTP, FTP, and SMTP are examples of the application layer protocols the Patton-Fuller will now be utilizing for communicating electronically” (Network Design, 2012).

1. Application (in terms of cabling infrastructure): The application layer is the OSI layer closest to the end user, which means both the OSI application layer and the user interact directly with the software application. When determining resource availability, the application layer must decide whether sufficient network or the requested communication exists.. (OSI_model#Layer_7:_application_layer)

Each layer has a specific function and the layers work together to allow an application to send data over a computer network without really specifying the exact protocols and/or physical wiring within each layer. In line with the figure above, when the first CEO sends an email message to the second CEO, email ‘application worker’ firstly prompts the first CEO to enter a message and specify that the receiver is the second CEO. The application worker then creates the necessary data package with message contents and the destination email address and send s this to a ‘transport worker’. The transport worker provides transport integrity. The transport worker may establish a connection with the receiver (second CEO); monitor the overall

The physical layer is especially important because of its ability to carry data over a physical link that connects the network nodes between the hospitals (Bauer & Patrick, 2004). This layer of technology would be useful because it allows the implementation of data from one source to another. The data link layer acts as a safe guard because it is able to handle any of the errors that result from the physical transmission of data. In order for the OSI model to function properly there must be a layer in the technology dedicated to the successful transmitted of

| d. A layer of the Open Systems Interconnection (OSI) model that frames upper-layer data and controls how data is placed on a medium

The application layer: this layer allows different applications to communicate with each other’s. In order to exchange different data over the network connection, the protocols included in this layer set up the standards such as DNS, HTTP, FTP. The data coded in this layer will be encapsulated to transport layer for further packing.

The first three layers are part of the hardware. The first one, called Physical layer, defines the method of moving data between computers, so it is mostly the cabling and signal modulation. This is the physical channel through which the bits of data move. Network devices that operate at the physical layer include a repeater and a hub. The Data Link layer is the second layer and it has the NIC, which is the Network Interface Card. The NIC contains the Media Access Control (MAC) address, which is the unique physical identifier of each system. The recipient’s and sender’s Mac Address, together with the data and the frame check sequence (FCS) is contained in “envelopes” called frames, which are passed to the next layer. The Network layer is the third layer and it includes the routers. It is also the layer where the packets get created and addressed to go from one network to another using the Internet Protocol (IP). The IP packets include the destination IP address, the source IP address and the data. IP addresses work as the network interface identification and location addressing and are stored in the system software.

-This level provides message routing, determining whether a particular message to be sent to -Level 4 (Transport Layer) or Level 2 (data link).

It is important to note that some of the layers of the TCP / IP model have the same name as the layers of the OSI model.

Next layer 3 the Network layer is where the Internet Protocol (IP) will take place and be defined. There are two options to use here IPv4 or IPv6.

Describing the way of interaction between different applications and protocols on any network-aware devices is done by the OSI (Open System Interconnection) model. The OSI model characterizes seven layers that depict how applications running upon system mindful gadgets may correspond with one another. The model is nonexclusive and applies to all system sorts, not simply TCP/IP, and all media sorts, not simply Ethernet. It is consequently that any system specialist will garrulously toss around the term "Layer 4" and hope to be caught on.

The first and lowest level of the model is the Physical layer. The physical layer consists of the basic networking hardware transmission technologies of a network (Osi-model.com). Here you could find specifications for telecommunication like types of wired cables such as; copper, optical, or coaxial. In this layer, you would configure

The lower level layer of the TCP/IP model, this layer is used by a suite of protocols for the “Internet”. This is used to connect hosts or nodes to a network. This layer is compared to the “Data Link” layer and “Physical “ layer of the OSI model.

1. What is the definition of the Internet? The definition of the Internet is worldwide system that is created of tiny computer systems.