Unit 3 Assignment 1: An Analysis Of A Publisher-Subscriber Network

It is operating on best effort delivery model, i.e. it does not guarantee delivery, nor does it assure proper sequencing or avoidance of duplicate delivery. These aspects, including data integrity, are addressed by an upper layer transport protocol, such as the Transmission

Nevertheless, to begin with, a server looks the same as windows but has no special features such as, transparent background as servers don't need this as it would just use the memory of the computer. Also, every server can be assigned a role in which they contain many roles such as, DHCP, which is prompted when you install a server. However, it is also beneficial to know that one server can have many roles nevertheless; the more roles that you assign to one server would mean that it uses more resources so, it would be better to have more servers in order to share the roles.

Server: This is a computer that is designed to carry out specific functions at the request of other computers they’re connected to a network and direct the information stored on the network to clients, for example a web server will run software that receives requests from clients and then processes the request and delivers an output using HTML.

A computer and a server are usually two unique and separate devices and each are customized to handle specific functions and purposes. For example a web server will not need any type of display or monitor and can be located anywhere. But when it comes to a data server or client, there is typically a need for some form of display monitor so information can be reviewed and tracked. It is not uncommon in some occurrences that a device can function both as a computer and a server for the same application. This also can hold true for a application act as a client to other server for various other

before the client does, and waits for the client to request connections. Figure 3.11 shows the

Client Server is a computer system where a central server provides data of networked workstations.

3. How does a client application identify a server application on another computer on the

are setup, then data (packets) transmissions will be as fast and easy as in the tradition wired

There are many solutions that offer communication in distributed systems. The shortcomings of the alternatives are combinations of coupling of space (i.e. sender and receiver need to hold references about each other), time (i.e. the components need to interact at the same time) and synchronization (i.e. the individual components block their activity while waiting for other processes to finish). To solve these issues we use a publish/subscribe mechanism, which decouples time, space and synchronisation. Furthermore the message delivery logic lies with the message broker, decoupling it

Content-Centric Network (CCN) or Named Data Network (NDN) is a new face or dimension in transfer of data between sender and receiver. It provides Internet architecture for future utilization, provided by empirical research for growing complexities and problems in traditional Internet architecture e.g. internet Protocol (IP) [1],[2] It is developed to focus on content distribution instead of host to host communication. Being content-centric rather than host-centric brings many advantages i.e. scalability and security, higher data-rate and reduces latency.

The design is made up of two components, Client and Server the server provides some services which the client can access by using a reply/request protocol. This is a kind prevailing model for networking being peer – to- pear.

The two TCP/IP transport layer protocols (TCP and UDP), are very crucial for the smooth operation of network services for both the computer applications and application layer protocols such as HTTP, FTP, SMTP and Telnet. These two transport layer protocols TCP and UDP execute these services via the employment of IP. They use IP in the efficient routing of packets to their respective destination networks (Steinke,2001).The TCP is further noted by Steinke (2001) to be responsible for the provision of a reliable and yet connection-oriented byte-stream packet delivery while its counterpart UDP is noted to be responsible for the provision of a connectionless but rather unreliable packet delivery. In this paper we explain the work of the two TCP/IP transport layer protocols (TCP and UDP). In addition, describe how TCP and UDP manage key functions such as reliability, port addressing, and segmentation.

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

Network is the mediator between customer PC and server. It connects customer PC to the server and permits the sharing of information stored in server computers. It is critical to choose the right network with regards to architecture outline as it must be sufficiently secure. As this system is a secure system, thus, connection oriented approach utilizing TCP/IP is proposed. The client may need a connection-oriented application for something as vital as viewing electronic pay stubs. A UDP or connectionless protocol is not a safe protocol for the electronic stubs. The diagram to demonstrate the service of network according to the connection type is as given below:

Communication has always been one of the essential needs of humanity. In the past 20 years, communication systems have developed drastically in a small amount of time, as a result of the creation of Internet, the use of communication systems has been enhanced, allowing our modern technologies to function efficiently and fulfilling our needs as the industry grows. The industry is constantly looking for methods to increase the quality, quantity and velocity in the transfer of data.