Application Layer 7 Of The Osi Model

One of the very good utilities of the hospitals network is the availability of the wireless access on the ward level, this will insure instant connectivity to the hospitals network from the small mobile devices such as laptops or other Wi-Fi based medical devices such as the new cardiograph devices which shares data with the database servers through wireless connection. These wireless devices depending on the diagram specifications are in 5 gigahertz frequency which are not compatible with every laptop computer, a recommendation to replace them with 2.4 gigahertz frequency devices are more efficient in order to allow laptops to access the network. A special attention is needed in the security of these wireless access points by connecting them to a server like RAS server to authenticate the personnel accessing the network wirelessly before allowing the devices to use the network. This is very important practice to prevent a destructive intrusion into the network.

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

Authentication: 802.11 defines authentication services to control LAN access to a level equal to a wired link because wireless LANs have limited physical security to prevent unauthorized access. Every station, whether part of an independent BSS or an ESS network, have to use the authentication service prior to establishing a connection with another station with which it wishes

During this presentation we learned of the network types that Whitewater uses and how they differ. For example they have three different networks which separate devices that are allowed to access the network. Their network gives each device a certificate that is good for 2 years. They also recently implemented a check in for devices accessing the network so that they can verify whether or not the user has an anti-virus installed.

Zhu, J., & Ma, J. (2004). A new authentication scheme with anonymity for wireless environments. Co

So RADIUS server advantage: we want to set up multiple wifi-ap, you don't need to set up each AP user account, because each staff has their own AD account, verification whether employees by Radius Server. Regional offices staff Through the VPN connect headquarters Radius Server can connect wifi-ap.

The network level security will form the relationships of authentication, encryption and authorization for the wireless network and its connectivity between wireless clients to the internal network. Some recommendations are:

A RADIUS Server essentially authenticates the client’s logon information. Although a RADIUS server encrypts a client’s password while transmitting, it does not encrypt any other information which can lead to the information being obtained easily, this can be fixed by the use of L2Tp and

The OSI (Open System Interconnection) model is a set of specifications that allow computers around the world to openly communicate. It is pivotal to understanding and developing computer to computer communications in a network. Each layer plays a role in the process of sending and receiving data. The application layer is the top layer (layer seven) it promotes communication between programs and lower-layer network services. The services at this layer allow the network to decipher a program's request and the program to decipher data sent from the network. The Application layer protocols, programs handles formatting, procedure, security, synchronization, and any other requirements with the network. The Presentation Layer (layer 6) acts as a translator. For instance these protocols decode the jpg/jpeg files sent within the Web server’s HTTP response. So, in the last step (the Application layer) we enter the Web address and it took us to the Web site. This step allows us to see the images and content of the site. The Session Layer (layer 5) regulates and controls the communication between two nodes on the network. It is an ongoing exchange of data between the two and keeps the connection between them for the duration. It keeps the communication secure, detects whether or not the communication has been cut off and if it has it determines where to restart the

A communications protocol characterizes the guidelines for sending pieces of information starting with one hub in a system then onto the next hub. Conventions are regularly characterized in a layered way and give all or part of the administrations indicated by a layer of the OSI reference show. A convention characterizes the operation of the convention and may likewise propose how the convention ought to be actualized. It comprises of three sections:

In designing and building a payroll program for a large organization with offices spread across the country, which possesses quite a few changelings to overcome and must be done in a particular manner. Thus having the right application architecture is important where the design is concerned. Because the company has one large data center that each office connects to via a wide area network (WAN), hence the appropriate architecture for this solution would have to consist of a WAN diagram to be used in management of this project, along with system documentation, and information technology architecture documents to provide a visual representation of the network. A wide area networks (WANs) usually covers a large, physical area. And many WANs

RADIUS (Remote Access Dial-In User Service) uses UDP Protocol and Port(s), of 1812 & 1813 -or- UDP: 1645 & 1646. However, it encrypts only the Password Field and combines Authentication and Authorization ("TACACS+ and RADIUS Comparison," 2008).

Users that have a wireless LAN should add security to ensure only intended users have access. Some safeguards include use of WEP (Wired Equivalent Privacy) encryption, IPsec, WPA (WiFi Protected Access), with a firewall or DMZ. A DMZ (demilitarized zone) is a physical or logical sub-network that separates the LAN from other entrusted networks

During this process both client and server should show that they knew each other. The EAP-MS-CHAP v2 works only with PEAP. Protected EAP uses transport layer security to enhance security authentication. PEAP uses server authentication is used for protecting against creation of illegal access points and it also uses FAST RECONNECT.

The ability to send and receive data efficiently is the most important objective of networking computers.