this is a descent ppt prepared by me on - SURVIVABLE NETWORK SYSTEMS.

1. Survivable Network Systems
Presented By,
KARUNAKAR THAKUR
Guided By,
Ms. Supriya Pawar
Date: 01/03/12

2. 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.

3. Contents
 Expressing Survivability Requirements.
 Survivability : Design And Implementation
Strategies.
 Case Study on Survivability in optical
networks
 Research Directions.
 Future Scope.
 Conclusion.

4. 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
,

5. IMPORTANCE OF
NETWORKS
Principal enabling agents in
business,industry,government, and defense.
Other Sectors :
energy,transportation,telecommunication,
manufacturing,financial services, health care
and education.

6. Survivable System With 3
R's : Resist , Recognize , and
Recover
Effected node due to attack.

7. DOMAIN OF SURVIVABILITY

8. ITS CHARACTERISTICS

9. Survivability as an Integrated
Engineering Framework
 Survivability and Security
 Survivability and Fault Tolerance
 The Current State of Practice in Survivable
Systems

10. Survivability Requirements

11. Survivability and System
Requirements

12. Survivability: Design
 Survivability Analysis Is Protocol-Based Not
Topology-Based
 Survivability Requires a Management
Component

13. Strategies To Improve Network
Survivability
Techniques to improve network survivability
can be classified into three categories:
2.Prevention
3.Network Design and capacity allocation
4.Traffic Management and Restoration
The ideal survivability goal is to make a
network failure imperceptible to the network
users by providing service continuity .

14. Algorithm: For a Primal
Approach

15. 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

16. APS

17. Case Study
There are two types of SHR’s :
1. Unidirectional SHR (USHR)
2. Bi-directional SHR (BSHR)

18. Restoration Steps

19. Survivability in WDM network

20. 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.

21. 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.

22. 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.

23. Questions????
Have a nice day……..Thank You!!!