Unit 1 Assignment 2.3 Network And System Configuration

1: Physical layer: The purpose of the physical layer is it deals with the hardware components, like cads and cables for sending and receiving data of a carrier.

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

One of the important part of system administration should be secure, so it is very important to understand which factors can affect security inside and outside our system. There are many key decisions that have to be made, for example, what server operating system should a system use to which

This makes sure the data transferred is in the right order, error free and reliable from beginning to end. The Network Layer is the third layer of the model and its function is to interpret the network addresses into physical addresses and figure out how to direct them from the sender to the receiver. The next layer is the Data Link Layer, this is the second layer and it separates the data it receives from the Network layer into specific frames so they can be transmitted by the Physical layer. Frames are packages for moving data, they include the raw data, the sender and receiver’s addresses, as well as error checking and control information. This makes sure the frames are delivered to their destination without any problems. The physical layer is the first layer and the lowest, the protocols at this layer recognize and receive the frames from the Data Link layer. They also monitor data error and set data transmission

You will discover different network topologies and different types of networks: LANs, WANs, and internetworks (internets). The concept of switching is discussed to show how small networks can be combined to create larger ones. You will learn about the Internet: its early history, the birth of the Internet, and the issues related to the Internet today. This module covers standards and standards organizations.

The main base for the protection of your own you have to be a security think (what I mean thinking any security you have the same way of thinking that enjoyed by penetration) experts

NOTE THE FOLLOWING CHANGE: In the Preferred DNS server text box, type the following DNS Server Value: 192.168.111.250 (our classroom hardware is different from that of a Microsoft-only network)

Lack of Service: You may be in a location where there are no wireless broadband alternatives or may have poor cellular coverage. This might be rectified by adding a 'cell site ' to your home.

There are three kinds of MQTT-SN components: clients, gateways and forwarders. MQTT-SN clients connect themselves to a MQTT server via a MQTT-SN gateway using the MQTT-SN protocol. A MQTT-SN gateway may or may not be integrated with a MQTT server. In case of a stand-alone gateway, the MQTT protocol is used between the MQTT server and the MQTT-SN gateway. Its main function is the translation between MQTT and MQTT-SN. MQTT-SN clients can also access a gateway via a forwarder in case the gateway is not directly attached to the network. The forwarder simply encapsulates the MQTT-SN frames it receives on the sensor network side and forwards them unchanged to the gateway; in the opposite direction, it decapsulates the frames it receives from the

network service (http, telnet, etc), etc. The content feature e.g. number of failed login attempts etc. The

Core The core layer is the backbone layer of the network running at high speed switching, transferring large amounts of data and also handling the requests of the distribution layer . This layer has high speed devices; the most implementations have layer 3 switches or high end routers. Its key characteristics are: redundancy, fast transport of large amounts of data, high reliability and availability, low latency. The core layer should not do any packet manipulation.

1. How does the abstraction of the physical layer facilitate interoperability across networks using different types of physical wires?

In this smart world there is a rapid growth in using mobile network for requesting many queries, especially videos.Problem is more Base Staion (BS) is required for providing a continuous service, for the user to view videos without getting buffer, or in degrading of video quality. Since more BS are required, all BS has to be active all time, therefore energy requirement is more. It cause more power consumption, also if BS is reduced for save power it leads to poor quality of service(QOS). During peak traffic load during rush hours, wireless access network must be over deployed. It requires lot of BS to be active even when many times slots in a BS are free while providing service. Also, in a low-traffic period, the user will not request any data, but the BS have to be active.

The internet follows the open systems interconnect model (OSI) developed by Charles Bachman at Honeywell Information Services, this consists of seven layers. 1. The physical layer, this includes both wired and wireless forms of communication. An Ethernet cable or

The Internet is a global system of interconnected computer networks that use the standard Internet protocol suite (TCP/IP) to serve billions of users worldwide. It is a network of networks that consists of millions of private, public, academic, business, and government networks, of local to global scope, that are linked by a broad array of electronic, wireless and optical networking technologies. The Internet carries a vast range of information resources and services, such as the inter-linked hypertext documents of the World Wide Web (WWW) and the infrastructure to support electronic mail.