Survivable Network Systems

Presented By,

KARUNAKAR THAKUR

Guided By,

Ms. Supriya Pawar

Date: 01/03/12

Contents

What is ‘Survivability’? Domain of survivability. Characteristics of Survivable Systems. Survivability as an Integrated Engineering

Framework The Current State of Practice in Survivable

Systems.

Contents

Expressing Survivability Requirements. Survivability : Design And Implementation

Strategies. Case Study on Survivability in optical

networks Research Directions. Future Scope. Conclusion.

What is ‘SURVIVABILITY’?

Survivability can be defined as the capability of a system to fulfill its mission, in a timely manner, in the presence of attacks, failures, or accidents.

Built On : Security,Fault Tolerance,Safety,Reliability,Reuse,Performance,

Verification and Testing.

IMPORTANCE OF NETWORKS

Principal enabling agents in business,industry,government, and defense.

Other Sectors : energy,transportation,telecommunication,

manufacturing,financial services, health care

and education.

Survivable System With 3 R's : Resist , Recognize , and Recover

Effected node due to attack.

DOMAIN OF SURVIVABILITY

ITS CHARACTERISTICS

Survivability as an Integrated Engineering Framework

Survivability and Security Survivability and Fault Tolerance The Current State of Practice in Survivable

Systems

Survivability Requirements

Survivability and System Requirements

Survivability: Design

Survivability Analysis Is Protocol-Based Not Topology-Based

Survivability Requires a Management Component

Strategies To Improve Network Survivability

Techniques to improve network survivability can be classified into three categories:

1.Prevention

2.Network Design and capacity allocation

3.Traffic Management and Restoration

The ideal survivability goal is to make a network failure imperceptible to the network users by providing service continuity .

Algorithm: For a Primal Approach

Case Study on Survivability in Optical Networks

Survivability techniques : 2 categories –

1. Predesigned Protection – APS and SHR’s

2. Dynamic Restoration : Restoration Steps

Three main architectures of APS :

1. 1+1

2. 1:1

3. 1:N

APS

Case Study

There are two types of SHR’s :

1. Unidirectional SHR (USHR)

2. Bi-directional SHR (BSHR)

Restoration Steps

Survivability in WDM network

Research Directions

Representing intruder environments through intruder usage models.

Adapting and developing architectural description techniques to adequately describe large-scale distributed systems with survivability attribute.

Future Scope

Unbounded Systems(e.g. Internet) will become free from intruders and attacks .

Thus ,a more risk-free environment for online transactions and banking.

More intelligent networks. Intelligent Firewalls.

Conclusion

Thus we have seen how survivability is proving an emerging discipline in transformation of networks into an intelligent one that can resist,recognise,recover and adapt according to the attacks made.

Questions????

Have a nice day……..Thank You!!!