Nt1310 Unit 3 Assignment 1

The Data link layer [also called layer 2] is responsible for moving a message from one computer or network device to the next computer or network device in the overall path from sender or receiver. It controls the way messages are sent on the physical media. Both the sender and receiver have to agree on the rules or protocols that govern how they will communicate with each other. A data link protocol determines who can transmit at what time, where a message begins and ends, and how a receiver recognizes and corrects a transmission error.

Layers 7-4 were intended to allow end to end communication between the data source and its destination. Layers 3-1 were designed to communicate between devices within a network.

These two layers perform routing and deals with end to end issues. The hospital currently uses a CISCO ASA 5510-VPN router to connect to the internet. Finally the session layer, presentation layer, and application work together to make the network operational. These three layers actually make all the data be visible to the end users. These layers also make the data and network usable to the operator. Patton-Fuller utilizes Windows Explorer and its company’s webpage for these layers (Patton-Fuller, 2013).

Today, security devices such as Firewall, IDS are used on the many organization's networks for preventing security attacks. But, these devices can only diagnose illegitimate traffic and prevent it. They cannot prevent attacks which are as a result of the network devices vulnerabilities in the switches, routers, and etc. A malicious user who is within the network can implement many attacks by using these vulnerabilities. This paper explains the kind of existing vulnerabilities in Cisco switches and methods of preventing these attacks from

With the increasing use of technology today with computers, there are better ways we can came up with to stop vulnerabilities in a network. As organizations increase their reliance on, possibly distributed, information systems for daily business, they become more vulnerable to security breaches even as they gain productivity and efficiency advantages. Network security is the becoming more important to a business because of the networks and applications. You never know when someone is coming for your business system. Looking at every strategy you have going on for your business. Need to have the set of tools for the security walls to be high. When dealing with hackers or competition all servers not to be access easily. There is a large amount

The Internetwork layer is the layer that handles network configuration and is considered the heart of the TCP/IP protocol suite.

Let's analyze the various attacks and threats to which our network can be a victim. For a better understanding I'll start from the most external layer of the network.

In a nutshell, the OSI model is divided into seven layers that are responsible for moving data up and down the stack; from the user, all the way down to the physical layer where the cables reside and then back up again. Each layer uses its own protocols and is responsible for carrying out its assigned function. These layers include the Application Layer (layer 7), Presentation Layer (layer 6), Session Layer (layer 5), Transport Layer (layer 4), Network Layer (layer 3), Data Link Layer (layer 2) and the Physical Layer (layer 1). See Figure 3-3 for illustration of OSI model.

The third layer is the network layer. In the network layer data is routed through various physical networks while traveling to a known host. Information contained in the network layer allows routers to make decisions on how the data gets to its destination. Security

1. Describe the 7 layer OSI model of communication layers? Discuss Each Layer in detail.

The transport layer is responsible for managing the transmission of data between the two computers. At this layer, data is divided into small segments so that segments are transported one at a time. The transmission of

It is vital to integrate these four steps into any network intended to be secure. Properly configured a secured network will be able to protect itself from attacks like PW hacking, DDOS attacks, brute force attacks, and insiders abusing their system rights (internal and external).

Our plan will include network security, which will protect the network. It will protect the usability, reliability, integrity, and safety of the network and data. Plan will also include host based security system. These will include applications to monitor detect, and counterattack against the hosts networks and systems. There are many types of security methods can be used to secure a network.

The network layer is capable of sending broadcast requests, manages routing, processing received messages. Outgoing frames will makes use of adequate key based on routing, if the key is available; otherwise, it uses the network key which will be used to protect the payload

The networking applications of the OSI model are mail, web, file transfer, management, and remote connections.