Where should the connectors be deployed? What usage characteristics determine the best option?
Design Scenario Chapter Description To help you handle the difficulties inherent in designing network security for complex networks, this chapter teaches a systematic, top-down approach that focuses on planning and policy development before the selection of security products.
Security design is challenged by the complexity and porous nature of modern networks that include public servers for electronic commerce, extranet connections for business partners, and remote-access services for users reaching the Improving network topology from home, customer sites, hotel rooms, Internet cafes, and so on.
To help you handle the difficulties inherent in designing network security for complex networks, this chapter teaches a systematic, top-down approach that focuses on planning and policy development before the selection of security products. The goal of this chapter is to help you work with your network design customers in the development of effective security strategies, and to help you select the right techniques to implement the strategies.
The chapter describes the steps for developing a security strategy and covers some basic security principles. The chapter presents a modular approach to security design that will let you apply layered solutions that protect a network in many ways.
The final sections describe methods for securing the components of a typical enterprise network that are most at risk, including Internet connections, remote-access networks, network and user services, and wireless networks. Security should be considered during many steps of the top-down network design process.
This isn't Improving network topology only chapter that covers security. Chapter 2, "Analyzing Technical Goals and Tradeoffs," discussed identifying network assets, analyzing security risks, and developing security requirements.
Chapter 5, "Designing a Network Topology," covered secure network topologies. This chapter focuses on security strategies and mechanisms. Network Security Design Following a structured set of steps when developing and implementing network security will help you address the varied concerns that play a part in security design.
Many security strategies have been developed in a haphazard way and have failed to actually secure assets and to meet a customer's primary goals for security.
Breaking down the process of security design into the following steps will help you effectively plan and execute a security strategy: Analyze security requirements and tradeoffs.
Develop a security plan. Develop procedures for applying security policies. Develop a technical implementation strategy. Achieve buy-in from users, managers, and technical staff. Train users, managers, and technical staff. Implement the technical strategy and security procedures.
Test the security and update it if any problems are found. Chapter 2 covered steps 1 through 3 in detail. This chapter quickly revisits steps 1 through 3 and also addresses steps 4, 5, 6, and Steps 7 through 10 are outside the scope of this book. Identifying Network Assets Chapter 2 discussed gathering information on a customer's goals for network security.
As discussed in Chapter 2, analyzing goals involves identifying network assets and the risk that those assets could be sabotaged or inappropriately accessed. It also involves analyzing the consequences of risks.
Network assets can include network hosts including the hosts' operating systems, applications, and datainternetworking devices such as routers and switchesand network data that traverses the network.
Less obvious, but still important, assets include intellectual property, trade secrets, and a company's reputation. Analyzing Security Risks Risks can range from hostile intruders to untrained users who download Internet applications that have viruses.
Hostile intruders can steal data, change data, and cause service to be denied to legitimate users. Denial-of-service DoS attacks have become increasingly common in the past few years.
See Chapter 2 for more details on risk analysis. Analyzing Security Requirements and Tradeoffs Chapter 2 covers security requirements analysis in more detail. Although many customers have more specific goals, in general, security requirements boil down to the need to protect the following assets: The confidentiality of data, so that only authorized users can view sensitive information The integrity of data, so that only authorized users can change sensitive information System and data availability, so that users have uninterrupted access to important computing resources According to RFC"Site Security Handbook: Cost in this context should be remembered to include losses expressed in real currency, reputation, trustworthiness, and other less obvious measures.
As is the case with most technical design requirements, achieving security goals means making tradeoffs. Tradeoffs must be made between security goals and goals for affordability, usability, performance, and availability.
Also, security adds to the amount of management work because user login IDs, passwords, and audit logs must be maintained. Security also affects network performance.Tree topology integrates the star and bus topologies in a hybrid approach to improve network scalability.
The network is setup as a hierarchy, usually with at least three levels.
The devices on the bottom level all connect to one of the devices on the level above it. Eventually, all devices lead to the main hub that controls the network. Network Topology refers to layout of a network. How different nodes in a network are connected to each other and how they communicate is determined by the network's topology.
Mesh Topology: In a mesh network, devices are connected with many redundant interconnections between network nodes. In a true. NeuroSolutions Infinity is the easiest, most powerful neural network software of the NeuroSolutions family.
It streamlines the data mining process by automatically cleaning and preprocessing your data. Then it uses distributed computing, advanced neural networks, and artificial intelligence (AI) to .
Explore the features of the best cloud based network monitoring software, Auvik. Unlike other MSP tools, Auvik goes beyond SNMP monitoring to deliver full remote network management of your clients network . Publications by date. Non-Discretionary Access Control for Decentralized Computing Systems (Cached: PDF) by Paul A.
Karger. Laboratory for Computer Science, Massachusetts Institute of Technology S. M. amp; E.
E. thesis MIT/LCS/TR, May Improving network topology-based protein interactome mapping via collaborative filtering. Their main idea is to address the problem of PIM by analyzing the topology of the network corresponding to available HTS-PPI data,,,,. Saito et al.