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Диплом  Quality of Service in Converged Enterprise Networks

Содержание:

Abstract 5
Introduction 6
Background 7
Circuit Switching 9
Packet Switching 10
What is Voice over Internet Protocol (VoIP?) 10
How VoIP Works 11
Benefits of VoIP 12
Convergence 12
Benefits of Converged network in Enterprise 13
Voice Switching in the Enterprise Network 14
What is Voice Switching? 14
Major Components of VoIP 15
Factors affecting Voice over IP quality 16
End-to-end one-way delay 17
Packetization delay 17
Propagation delay 17
Packet Loss and its burstiness 19
Jitter 19
Factors that Impact Variable Delay (Jitter) 20
Voice quality metrics 20
All Networks Experience Delay 21
Planning for VoIP 21
Perform Readiness Audit 22
Network Diagrams 22
Link Types 22
Point-to-Point Links 22
Frame Relay 22
Asynchronous Transfer Mode 23
Network Availability 23
Bandwidth 23
Voice Compression 24
Network Security 24
Traffic Flow 24
Lost Data 24
Quality of Service (QoS) 25
Why is QoS important? 25
QoS architectures 26
Methods to achieve QoS 27
Best effort 28
IP QoS via Integrated Services 28
IP QoS via Differentiated Services 29
Expedited Forwarding DiffServ Class 31
Assured Forwarding DiffServ Class 32
Ethernet 802 Standards 33
Port-based Prioritization 34
Traffic Separation 34
Internet Protocol Address Prioritization 35
Packet Fragmentation 35
Frame Relay FRF. 12 35
Point to Point Protocol Fragmentation 36
IP Fragmentation (Maximum Transmission Unit) 36
Challenges of Low Speed Wide Area Network Connections
Compression
Serialization Delay and MTU
Challenges of Local Area Network Environment
Congestion
Collision
Conclusion
References

Диплом  Quality of Service in Converged Enterprise Networks