Lec4: Network Models 1 Relationship Between Network Security & Cost
8K - views

Lec4: Network Models 1 Relationship Between Network Security & Cost

Similar presentations


Download Presentation

Lec4: Network Models 1 Relationship Between Network Security & Cost




Download Presentation - The PPT/PDF document "Lec4: Network Models 1 Relationship Betw..." is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.



Presentation on theme: "Lec4: Network Models 1 Relationship Between Network Security & Cost"— Presentation transcript:

Slide1

Lec4: Network Models

1

Slide2

Relationship Between Network Security & Cost

2

High

Risk

Medium RiskLow RiskCostLowMediumHighUsed byUniversitiesCompanies & organizationsMilitary organizationsVulnerability to attacksHighMediumLow

Security

Risk

Cost

Slide3

Graph that demonstrates the relationship between cost & security

3

Cost

Security

Risk

Low Security

Medium SecurityHigh Security

Slide4

Architectural models for network management

Network management architecture consists of three sections:

Centralized:

Consists of a key management station.

Hierarchical :Consists of one main station at the center and various management stations distributed among the systems.Distributed: Consists of various stations for network management Distributed based on the geographic distance or function.4

Slide5

Centralized Management Model

It is defined as a single network management system that runs network management applications and all the information are stored in a single centralized database.

Examples:

Open view (hp)

net view (IBM)Sepctrum5NM

Network Resource

Network Management system

NM

Slide6

Advantages of the Centralized Management Model

Facilitates decision making.

Only single place is determined for network management.

Easy access to the centralized database.

Easy to expand and maintain the network.Highly secure.6

Slide7

Disadvantages of the Centralized Management Model

In the case of failure in the network management, all the related network management systems will fail.

Overloading the network management system due to the large amount of the exchanged information.

7

Slide8

Hierarchical model

Hierarchical

model is defined as a single network management system that manages various smaller network management systems that control network resources.

Examples:

Open view (hp)Cisco 8NM

NM

NMNetwork Resource

Network Management system

NM

Slide9

B. Hierarchical Model (Cont.)

Advantages:

Distributing the load of the network.

Distributing the load of managing the network.

Bringing the network management systems closer to the managed network resourcesDisadvantages:High cost.Complicated and difficult in connection.9

Slide10

Distributed Management Model

In this model network management systems are distributed on different indeterminate and in dependable places.

Examples:

CORBA(NCR)

DCOM(Microsoft) 10NMNM

NMNMNetwork Management system

NM

Slide11

Distributed Management Model (Cont.)

Advantages:

Distributing the load on the entire network completely.

Easy to expand the network.

Reliable and consistent.Disadvantages:Very complicated.International standards are not yet defined. Low security.11

Slide12

Network Management Model

12

Manager

Agent

MIBManaged Entity

Alerts

InstructionsManagement Stations

Resources

Management Information Base

Slide13

Network Management Model (Cont.)

Manager:

A program that receives alerts from agents and sends instructions to them.

Agents: A functional unit (Programs) located inside the managed devices (network resources) and provide management information to the devices and receives instructions to reconfigure the devices.13

Slide14

Network Management Model (Cont.)

Managed Entity:

The network devices (resources) that is managed and controlled.

Management Information Base (MIB): A database of managed entities (resources) in the network and how they are accessed. Example:Remote Monitoring (Rmon) One of the most famous MIBs (management information bases) Used to monitor all the different components of LAN networks14