Model For Network Security Slideshare

It is a 7 layer architecture with each layer having specific functionality to performed. And you certainly do not have time to set up and manage a firewall. Network security is manifested in an implementation of security hardware and software. 6 Network Access Security Model A general model is illustrated by the above Figure 1. Building a Security Operations Center (SOC) TECH-203 Advanced. This is known as the client server architecture model. Multilayer Perceptron. Identify attacks and share insights. Session layer manages and synchronize the conversation between two different applications. The complete list of IEC Standards (by importance and relevant application) is also available for download. Security models can be informal (Clark-Wilson), semi-formal, or formal (Bell-LaPadula, Harrison-Ruzzo-Ullman). This is usually achieved by conducting a network penetration test , which aims to assess your network for vulnerabilities and security issues in servers, hosts, devices and network services. Find out more about wireless network scanners from Kevin D'Arcy is VP of Sales and Marketing for MES Hybrid Document Systems, Ontario's leading document scanning and document. This tutorial explains network security threats (hardware & software), types of network security attacks (such as Active & Passive attack, insider & outsider attack, Phishing, Hijack, Spoof, Buffer overflow, Exploit, Password, Packet capturing, Ping sweep, DoS attack etc. You might set up network ACLs with rules similar to your security groups in order to add an additional layer of security to your VPC. Security controls must be in place to leverage such risk acceptance in the overall network. Strengthen your security and protect your cloud accounts by integrating CloudSOC with insights from the world's largest civilian global intelligence network, and advanced threat protection. Capabilities of a router. This is because a wireless network eliminates the need for a direct or physical connection between each computer or device on the network. Browse Panasonic Network Video Recorders Search here.



Security Models and Information Flow John McLean Center for High Assurance Computer Systems Naval Research Laboratory Washington, D. Topic PDF, 1 slide/page PDF, 2 slides/page Introduction 1: 2; Review of networks. Solid state storage and intelligent software allow for customizable video retention. These components can be rapidly orchestrated, provisioned, implemented and decommissioned, and scaled up or down providing for an on-demand utility-like model of allocations and consumption •Old: The Network is the Computer (Sun Microsystems, 1997) 2. This website promotes Networking Projects, Network Security Projects, Network Design Projects , network programming projects, cyber and security projects for students, engineering graduates and professionals with reports which include detailed network diagram. Find a local Network contact point Get in touch with your local Network contact point by selecting the country and city closest to where your business is based. While cloud infrastructure is the hardware and software components required for cloud computing, infrastructure as a service (IaaS) is a cloud model that gives organizations the ability to rent those IT infrastructure components -- including compute, storage and networking -- over the internet from a public cloud provider. Secure inbound and outbound traffic McAfee Web Gateway delivers comprehensive security for all aspects of web traffic in one high-performance appliance software architecture. 6 Network Access Security Model A general model is illustrated by the above Figure 1. Network security is the security provided to a network from unauthorized access and risks. However, as more and more people become ``wired, an increasing number of people need to understand the basics of security in a networked world. This is usually achieved by conducting a network penetration test , which aims to assess your network for vulnerabilities and security issues in servers, hosts, devices and network services. Traditional network switches operate at Layer 2 Data Link Layer of the OSI model. The McAfee Endpoint Security Trust Model is a new security model that differs from legacy McAfee products. (1) Sale ANRAN 8Channel PoE Home Security Camera Syste. Composition of the network. In this example the ITIL security Management approach is used to implement e-mail policies. " Rohit Kohli, Genpact, Assistant Vice President, Information Security. You need a seamless path from device and user discovery, wired and wireless access control,. This Cisco security reference architecture features easy-to-use visual icons that help you design a secure infrastructure for the edge, branch, data center, campus, cloud, and WAN.



Traditionally, organizations and the government have focused most of their cyber security resources on perimeter security to protect only their most crucial system components and defend against known treats. At the center of this, of course, is our converged security policy, which dictates our IT governance, risk management, and compliance. 0 Unported License. Advantages and Disadvantages of the Client Server Methodology Advantages Organizations often seek opportunities to maintain service and quality competition to sustain its market position with the help of technology where the client/server model makes an effective impact. You can easily integrate Bitdefender antimalware technology into your product or service and offer it to your customers. Disadvantages of Bus Topology. And to be fair, there wasn't in the TCP/IP model either. The network security includes assurance of the limited access to sensitive information, the protection from unauthorized access, risks and potential security threats, and enhancement of network performance. Animated Network Security PowerPoint Template Network security is a pressing issue for which millions are spent each year by various companies to make sure that their networks are secure from any kind of breach or infection. However, as more and more people become ``wired, an increasing number of people need to understand the basics of security in a networked world. An overview of protocols involved in Internet of Things devices and applications. Network codes are a set of rules drafted by ENTSO-E, with guidance from the Agency for the Cooperation of Energy Regulators ( ACER ), to facilitate the harmonisation, integration and efficiency of the European electricity market. Rather than waiting to react to the next attack, take a proactive approach with DDoS weapons intelligence. Capabilities of a router. We've also covered some types of attacks that take place when Network security is not implemented properly. The objectives of a model include (1) to facilitate understanding by eliminating unnecessary components, (2) to aid in decision making by simulating. SAFE can help you simplify your security strategy and deployment. designing the network security architectures and an overview of the architectures of IT systems with high security require-ments such as e-commerce and data centers. We believe in information sharing and collaboration, and here is our playground to provide some of our research work to the security community. From a security perspective, managed switches provide protection of the data plane (User traffic being forwarded), control plane (traffic being communicated between networking devices to ensure user traffic goes to the right destination), and management plane (traffic used to manage the network or device itself).



This is a network added between an internal network and an external network in order to provide an additional layer of security. Network and Security Teams Converging Operational Model. Availability Ensuring timely and reliable access to and use of information Security Attacks, Mechanisms & Services Security Attack Any action that compromises the security of information Security Mechanism A process / device that is designed to detect, prevent or recover from a security attack. !Security Service: A service that enhances the security of data processing systems and information transfers. Re: Network Security key I don't believe I can take a screenshot of it. Network virtualization technology takes software-defined networking (SDN) to the next level by truly decoupling network resources from underlying hardware. Use the steps and tools in this document to resolve wireless Internet connection issues. Our network analytics portfolio provides AI-driven software that optimizes performance and security for mobile, fixed and IP networks. Network security is a complicated subject, historically only tackled by well-trained and experienced experts. What is the Security Update Validation Program? Dawn Thomas on 10-22-2018 09:05 AM Learn about one of the ways in which Microsoft validates monthly security updates prior to their official release. Continuation of the policy requires implementing a security change management practice and monitoring the network for security violations. It means that the content of a message when transmitted across a network must remain confidential, i. Good Security Standards follow the "90 / 10" Rule: 10% of security safeguards are technical. To view a copy of this license, visit. Connect with our national network of local coalitions and stakeholders working to implement alternative fuels, advanced vehicles, and fuel-saving strategies. Email: SecurityAwareness@iowa. With the emergence of new technology strategies such as Intranets and Extranets, protection of informational assets has become paramount. A security service makes use of one or more security mechanisms. Since financial transactions are the backbone of e-commerce, if not the entire purpose of it, any hesitation on the part of the customer when it comes to making online payments could spoil the e-commerce party. VOYDOCK AND STEPHEN T.



Find out more about wireless network scanners from Kevin D'Arcy is VP of Sales and Marketing for MES Hybrid Document Systems, Ontario's leading document scanning and document. RDFa, JSON-LD, Linked Data). What is Zero Trust? A model for more effective security The technologies that support Zero Trust are moving into the mainstream. 9 hours ago · After a review of documentation for the Libra protocol and its planned ecosystem, Steven Sprague believes Facebook left out key security components. by Rahaju Pal / Dhawal Thakker. Solve the toughest challenges in cloud security. In mobile ad-hoc network the nodes are independent. only the intended receiver and no one else should be able to read the message. AUTHENTICATION WITH INTEGRITY 2. Kernel sends the data over the network and the other end receives it. Actionable data to prioritize and investigate threats. In this chapter, we describe various service and deployment models of cloud computing and identify major challenges. The mobile device connects to the network via hardware. At the center of this, of course, is our converged security policy, which dictates our IT governance, risk management, and compliance. McAfee strongly recommends that adopting McAfee Endpoint Security is used as an opportunity to review current policies and configuration. Network Security Model. Rashmi Sinha, the CEO and co-founder of SlideShare is responsible for partnerships and product strategy. A computer security model is a scheme for specifying and enforcing security policies.



A dual technology line of laser and PageWide technologies gives HP Inc. It's main aim is to establish, maintain and synchronize the interaction between communicating systems. Enjoy network and local protection for your Windows, Mac, iOS and Android devices, at home and on the go. !Security Service: A service that enhances the security of data processing systems and information transfers. Furthermore, because this architecture was developed as an international standard, computer and communications vendors. Network Security Devices. ™ Campaign. Hierarchical Network Design (1. KENT Bolt, Beranek and Newman, Inc , Cambridge, Massachusetts 02238 The implications of adding security mechanisms to high-level network protocols operating in an open-system environment are analyzed. must follow three fundamental precepts. 265 Compact 1U Network Video Recorder. FOAF is a computer language defining a dictionary of people-related terms that can be used in structured data (e. Combine the power of AI and automation to simplify compliance, governance and security monitoring in the cloud. The lifecycle approach looks at the different phases of security, such as assessment, testing, implementation, monitoring and so forth, to provide methodology in securing our networks. Welcome to IT Careers on the Cisco Learning Network. The main difference of the network model from the hierarchical model, is its ability to handle many to many (N:N) relations. i-Pro Smart HD. Security features — cryptography, authentication and authorization, public key infrastructure, and more — are built in. The OSI model is a framework used for all communications in the cloud. org 57 | Page ECC has point multiplication which has repeated addition of two points.



Combine the power of AI and automation to simplify compliance, governance and security monitoring in the cloud. Main menu Security Systems. It is easy to understand. Network Security Refresher Course - Back Up, Back Up, Back Up Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Rather than waiting to react to the next attack, take a proactive approach with DDoS weapons intelligence. SECURITY IN THE INTERNET OF THINGS 5 | White Paper. Download the ESET Smart Security Premium installer file. Model covered in this slides are Chinese Wall, Clark-Wilson, Biba, Harrison-Ruzzo-Ullman Model, Bell-LaPadula Model etc. This website promotes Networking Projects, Network Security Projects, Network Design Projects , network programming projects, cyber and security projects for students, engineering graduates and professionals with reports which include detailed network diagram. Kismet is a console (ncurses) based 802. The economical, scalable, expedient, ubiquitous, and on-demand access to shared resources are some of the characteristics of the cloud that have resulted in shifting the business processes to the cloud ,. Like climbing a mountain, there is a lot of planning and work required, but when you get to the top, the view is amazing and well worth the journey. See for yourself. iosrjournals. In hierarchical data model the data is represented in the form of a tree like binary tree, it is simple. A network segment, also known as a network security zone, is a logical grouping of information systems in an enterprise network. Observer can be the. Since client/server architecture is a distributed model representing dispersed responsibilities among independent computers integrated across a network, it’s an advantage in terms of maintenance.



Employees are familiar with the network, know which systems hold valuable information, and may have easy access to those systems through their own account or the account of another use. From IoT to an always-on mobile workforce, organizations face increasingly complex IT infrastructures from campus to branches that are more exposed to attacks than ever before. designing the network security architectures and an overview of the architectures of IT systems with high security require-ments such as e-commerce and data centers. Secure Network Lifecycle Management. Confidentiality through Information integrity and access. The files will still be downloaded as they are in the "slides" folder in Slideshare Downloader's Program Files folder if you pause the download before it completes. Main menu Security Systems. Global Outbreak Alert and Response Network (GOARN) is a technical collaboration of existing institutions and networks who pool human and technical resources for the rapid identification, confirmation and response to outbreaks of international importance. This model of development combines the features of the prototyping model and the waterfall model. Layer 3 switches that blend the internal hardware logic of switches and routers into a hybrid device also have been deployed on some enterprise networks. Infrastructure as a Service. Information Security Division 1305 E. com server (which technically is called an HTTP server) so you could read this Web page. Boundary Layers (network segmentation, security zones, network firewalls, network IPS, anomaly detection, proxy/reverse proxy, network encryption, network access control, content filtering) 2. For a complete list of known ports and associated services, vulnerabilities, application use and more,. These components can be rapidly orchestrated, provisioned, implemented and decommissioned, and scaled up or down providing for an on-demand utility-like model of allocations and consumption •Old: The Network is the Computer (Sun Microsystems, 1997) 2.



McAfee strongly recommends that adopting McAfee Endpoint Security is used as an opportunity to review current policies and configuration. It was developed by David Elliott Bell and Leonard J. Welcome to IT Careers. The bridge between these two worlds is the network, traffic and the resources that support it. Network Security | News, how-tos, features, reviews, and videos. Complex network environments require close collaboration between SecOps and NetOps teams to maximize service delivery while protecting against escalating security threats. "Sharing and security model for local accounts" is a setting which, if set to Guest Only, forces all incoming network file sharing connections to authenticate as "guest". If network traffic is heavy or nodes are more the performance of the network decreases. Model vs Policy A security model maps the abstract goals of the policy to information system terms by specifying explicit data structures and techniques that are necessary to enforce the security policy. In the event that a system is managed or owned by an external. In a cam flooding attack, the goal of the attacker is to fill up the mac-address table of the switch by generating frames with different source mac-addresses. The models are the hierarchical trust model, the distributed trust model, and the bridge trust model. Effective network design implementation requires a solid understanding of the current state of recommended network models and their ability to scale as the network grows. First, a secure network must have integrity such that all of the information stored therein is always correct and protected against fortuitous data corruption as well as willful alterations. It contains four layers, unlike seven layers in the OSI model. 2 days ago · Best Practices How IoT is changing the definition of home security Innovation is providing homeowners with new ways to monitor what happens even when they aren’t home.



Network Virtualization & Security Software. In a cam flooding attack, the goal of the attacker is to fill up the mac-address table of the switch by generating frames with different source mac-addresses. It is effective at identifying new, emerging, and unknown threats, which is vital in today's dynamic threat landscape. These models can be abstract or. The diagram below shows the correlation between the OSI model and the TCP/IP stack. While Network Security Groups and User-Defined Routes can provide a certain measure of network security at the network and transport layers of the OSI model, there are going to be situations where you want or need to enable security at higher levels of the networking stack. 1 user found this review helpful. We enable enterprises, service providers and partners to envision, deploy, and evolve their IT environments. Examples include the encryption of the message, which scrambles the message so that it is unreadable by the opponent, and the addition of a code based on the contents of the message, which can be used to verify the identity of the sender. Hierarchical Network Design (1. AUTHENTICATION WITH INTEGRITY 2. Threat Management Industry-leading threat-management service to minimise risk, with an efficient global solution against emerging security breaches and attacks. This website promotes Networking Projects, Network Security Projects, Network Design Projects , network programming projects, cyber and security projects for students, engineering graduates and professionals with reports which include detailed network diagram. The primary goal of network security are Confidentiality, Integrity, and Availability. Boundary Layers (network segmentation, security zones, network firewalls, network IPS, anomaly detection, proxy/reverse proxy, network encryption, network access control, content filtering) 2. As a result, migrated legacy policies might not align with McAfee Endpoint Security best practices. Traditional network switches operate at Layer 2 Data Link Layer of the OSI model. Global Outbreak Alert and Response Network (GOARN) is a technical collaboration of existing institutions and networks who pool human and technical resources for the rapid identification, confirmation and response to outbreaks of international importance.



List the three PKI trust models that use a CA. The SG Security Scanner performs real-world attacks and analysis, providing information about the ports it finds open (if any), in order to help secure and better understand the potenital vulnerabilities of your network. What Are Some Types of Network Security? Network security systems consist of hardware and software components that help protect a network from unauthorized access, misuse or denial of service to networks and their data. 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). Network Security Network Layer - Learn Network Security in simple and easy steps starting from basic to advanced concepts with examples including Overview, Application Layer, Transport Layer, Network Layer, Data Link Layer, Access Control, Firewalls, Critical Necessity. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. This website promotes Networking Projects, Network Security Projects, Network Design Projects , network programming projects, cyber and security projects for students, engineering graduates and professionals with reports which include detailed network diagram. These database security best practices will help protect your data. The Kohonen Network - It is an unsupervised learning network used for clustering. After consulting with Troy Hunt and Scott Helme (Scott is also an EVE player!) on the security side of things a little bit, we worked together with the team in charge of the Account Management website to introduce a small "quality of life" update to the Two-Factor Authentication (hereafter 2FA) setup on https://secure. Download link for CSE 7th SEM CS6701 Cryptography & Network Security Answer Key is listed down for students to make perfect utilization and score maximum marks with our study materials. Cloud Computing 26 IEEE SECURITY & PRIVACY model necessitates the use of well-established service-level agreements. com server (which technically is called an HTTP server) so you could read this Web page. Department of Defense (DoD) multilevel security (MLS) policy. Therefore, a bitcoin payment network does not need to be encrypted or protected from eavesdropping. That's where application layer security and the OSI model come into the picture. Cables fails then whole network fails.



The files will still be downloaded as they are in the "slides" folder in Slideshare Downloader's Program Files folder if you pause the download before it completes. by Rahaju Pal / Dhawal Thakker. ConceptDraw DIAGRAM v12 diagramming and vector drawing software extended with Network Security Diagrams Solution from the Computer and Networks Area of ConceptDraw Solution Park lets fast and easy design all variety of network security models: Open. A VPN is a private network that uses a public network (usually the Internet) to connect remote sites or users together. CSE497b Introduction to Computer and Network Security - Spring 2007 - Professor Jaeger Page Windows Security • 0 to full speed - No protection system in early versions • Advantage - Know the limits of the UNIX security model • What are these? • Disadvantage - Legacy approaches from insecure environment. Depending upon the application and context, one of these principles might be more important than the others. The purpose of this series of blogs is to guide you on your journey up the Vulnerability Management Mountain (VMM). 0 Unported License. The economical, scalable, expedient, ubiquitous, and on-demand access to shared resources are some of the characteristics of the cloud that have resulted in shifting the business processes to the cloud ,. Here's why security experts say it might be the best way to stop. In different operating systems it also can be called Wireless Security Key, Wireless Password and Network Security Key. CompTIA Security+ is a globally trusted, vendor-neutral certification that demonstrates competency in network security, compliance and operational security, threats and vulnerabilities, application, data and host security, access control and identity management, as well as cryptography. The network security includes assurance of the limited access to sensitive information, the protection from unauthorized access, risks and potential security threats, and enhancement of network performance. Download link for CSE 7th SEM CS6701 Cryptography & Network Security Answer Key is listed down for students to make perfect utilization and score maximum marks with our study materials. Harrison-Ruzzo-Ullman model—This model details how subjects and objects can be created, deleted, accessed, or changed. This paper proposes a security model for health information networks and a minimum set of security mechanisms needed to address security requirements of the model. All parameters are then packed (marshalled) and a system call is made to send them to other side of the network. The Kohonen Network - It is an unsupervised learning network used for clustering.



Server Security. Network Network Management Protocol Figure 12. A computer security model is a scheme for specifying and enforcing security policies. Computer Network | Layers of OSI Model. " Rohit Kohli, Genpact, Assistant Vice President, Information Security. A network contains a lot of confidential data like the personal client data. ConceptDraw DIAGRAM v12 diagramming and vector drawing software extended with Network Security Diagrams Solution from the Computer and Networks Area of ConceptDraw Solution Park lets fast and easy design all variety of network security models: Open. With the emergence of new technology strategies such as Intranets and Extranets, protection of informational assets has become paramount. The proposed Network Security Model (NSM) is a seven layer model t hat divides the daunting task of securing a network infrastructure into seven manageable sections. Which of the following network elements would be used to support the new business model? A. Threat Intelligence Service combines A10 Networks security research with reputation data from over three dozen security intelligence sources to instantly recognize and block traffic from millions of known DDoS weapons. Session layer manages and synchronize the conversation between two different applications. NSM is used as a tool to breakdown network security into seven simple layers with a logical process. Session Layer - OSI Model. The main difference of the network model from the hierarchical model, is its ability to handle many to many (N:N) relations. Whether you are starting as a student, military personnel, career changer, or are looking to further advance your existing technology skills, these tools and resources will get you started towards your future career. It has been developed by ISO – ‘ International Organization of Standardization ‘, in the year 1974. Global facilities network Acquisition of Medco provides unique distribution capabilities and information technology support Medco is the number one mail-order firm Medco's service excellence has attracted major corporations and health-care organizations as clients. Network security entails protecting the usability, reliability, integrity, and safety of network and data.



, banking), or other services that rely on the affected computer or network. However, as more and more people become ``wired'', an increasing number of people need to understand the basics of security in a networked world. Easy-to-Use Security Reference Architecture. 265 Compact 1U Network Video Recorder. For more information about Cisco Enterprise Network Security, please visit the webpage here or contact your Cisco sales representative. Techopedia explains Network Protocols. While Network Security Groups, User-Defined Routes, and forced tunneling provide you a level of security at the network and transport layers of the OSI model, there may be times when you want to enable security at higher levels of the stack. Cisco Enterprise Network Security capabilities lend networking teams better control across the entire network. This website promotes Networking Projects, Network Security Projects, Network Design Projects , network programming projects, cyber and security projects for students, engineering graduates and professionals with reports which include detailed network diagram. Computers Security, also known as Cyber Security, is the security practices applied to the information systems and infrastructure, networks and data stored or transmitted over them. Network security. Network security is an organization's strategy and provisions for ensuring the security of its assets and all network traffic. This convergence will give us an ideal framework and context to generate a life-cycle approach to information security. Complete IaaS monitoring and control through all the stages of adoption; from Build, Access, Use, to Compliance using Symantec CWA, CWP, SAC, and CloudSOC CASB. In addition to the six models above, where the customer's internal security teams are involved in varying degrees, there is another "fully outsourced" model.



• The Open Systems Interconnection (OSI) reference model is a descriptive network scheme. The site also contains ideas and topics for projects, research papers, assignments. : Need for NSM. It is both an OSI layer 1 ( physical layer ) and layer 2 ( data link layer ) device, as it provides physical access to a networking medium and provides a low-level addressing system through the use of MAC addresses. The main difference of the network model from the hierarchical model, is its ability to handle many to many (N:N) relations. C&C systems used by botnets may follow any of these three models: the centralized model, the peer-to-peer [P2P] model, and the random model. Two fundamental concepts in computer and information security are the security model, which outlines how security is to be implemented—in other words, providing a. When you activate Security Center, a monitoring agent is deployed automatically into Azure virtual machines. Introduction. Figure 1-2. LaPadula, subsequent to strong guidance from Roger R. Network Security Refresher Course - Back Up, Back Up, Back Up Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. First, a secure network must have integrity such that all of the information stored therein is always correct and protected against fortuitous data corruption as well as willful alterations. Cryptography and Network Security: Overview Keywords Standards Organizations, Security Components, OSI Security Architecture, Aspects of Security, Passive Attacks, Active Attacks, Security Services (X. Select the down arrow next to Security. Security features — cryptography, authentication and authorization, public key infrastructure, and more — are built in. For example, a group of servers might be located in a secure area, away from humans, and only accessed through the network. Ninety-six percent of Americans currently shop online.



We also host events in Austin TX and DC Metro. Introduction. Software updates and security patches must be delivered in a way that conserves the limited bandwidth and intermit-tent connectivity of an embedded device and absolutely eliminates the possibility of compromising functional safety. [Azogu12a] propose an Asymmetric Profit-Loss Markov (APLM) model that measures the integrity level of the security schemes for VANET content delivery. Use your private IP addresses and define subnets, access control policies, and more. Whether you are starting as a student, military personnel, career changer, or are looking to further advance your existing technology skills, these tools and resources will get you started towards your future career. Global facilities network Acquisition of Medco provides unique distribution capabilities and information technology support Medco is the number one mail-order firm Medco's service excellence has attracted major corporations and health-care organizations as clients. 90% of security safeguards rely on the computer user ("YOU") to adhere to good computing practices Example: The lock on the door is the 10%. A good Wi-Fi router is essential for home network. by Rahaju Pal / Dhawal Thakker. Network World asked security pros to name their No. 9 hours ago · After a review of documentation for the Libra protocol and its planned ecosystem, Steven Sprague believes Facebook left out key security components. Understand the model of network security and network access. Just as they say in real estate: it’s location, location, location. : Need for NSM. The Cyber Security PowerPoint Template is a professional presentation featuring the Cyber Crime Theme. 800), Security Mechanism, Security Mechanisms (X. Graphical, mathematical (symbolic), physical, or verbal representation or simplified version of a concept, phenomenon, relationship, structure, system, or an aspect of the real world. This means that a well-implemented network security blocks viruses, malware, hackers, etc. Model For Network Security Slideshare.