Please see attachment for instructions
W5 Discussion Instructions: Quality of Service (QoS)
In 250 word, answer the 3 questions below with 4 evidence base scholarly articles in APA format.
Classical IP was designed to provide a “best effort” service in routing traffic through a network. IP does not handle the complexities of QoS (quality of service) associated with different types of services such as delay-insensitive data, delay-sensitive data, packetized voice, and packetized streaming video. Advanced concepts of QoS classification were introduced in the development of ATM technology by the telecom industry and the ITU in the 1980’s.
1. How does QoS fit in with the evolving Internet, and strive to
2. Identify important issues such as overlaying and implementing QoS on top of IPv4
3. Identify important issues such as overlaying and implementing QoS on top of with IPv6.
In 400 word total, replying to the 2 post below. Each reply must be 200 word.
J.N Post #1
Quality of service (QoS)- manages network traffic to ensure the performance of applications, it enables a network device to differentiate traffic and then apply different behaviors to traffic. QoS prioritizes specific types of traffic, such as voice or video, to maintain their quality. Applications can run on converged, packet-based networks where traffic shares a common infrastructure and network resources. QoS has the capability of controlling packet loss using random early detection (RED) algorithms, so that the device knows the packets to drop or process.
IPv4 and IPv6 both offer mechanism for implementing QoS, IPv6 has more of a robust and scalable framework. IPv6 has solved some of the troubles of IPv4, introducing Flow Label Field to identify packets belonging to the same flow, enabling more effective traffic management. Which helps the network identify important data like video calls or gaming, to provide better performance and stability. Transitioning to IPv6 and fully leveraging its QoS capabilities requires addressing challenges related to compatibility, adoption, and policy management. Other IPv6 improvement over IPV4 include more efficient routing without fragmenting packets, and built-in Quality of Service that distinguishes delay-sensitive packets, and elimination of NAT to extend address space from 32 to 128 bits. IPv4 has a small “type of service” field to prioritize traffic, and it’s limited. IPv4 header has limited space for QoS information and can restrict the granularity of traffic classification and management.
Reference:
Juniper Networks. (n.d.).
What is the difference between IPv4 and IPv6? | Juniper Networks. Www.juniper.net.
QoS: Classification Configuration Guide – IPv6 Quality of Service [Cisco ASR 1000 Series Aggregation Services Routers]. (n.d.). Cisco.
D.J Post #2:
Traditional IP networks operate on a “best effort” model, meaning all data packets are treated equally without prioritization. While this approach was sufficient in the early days of the Internet, modern applications such as video streaming, VoIP (Voice over IP), and online gaming require stricter performance guarantees. These services depend on low latency, minimal jitter, and sufficient bandwidth, making Quality of Service (QoS) essential for ensuring reliable network performance.
QoS encompasses a set of techniques that manage and prioritize network traffic based on specific requirements. The telecom industry first introduced robust QoS mechanisms through Asynchronous Transfer Mode (ATM) in the 1980s, allowing networks to classify and control traffic flows. These principles were later adapted for the Internet through Differentiated Services (DiffServ) and Multiprotocol Label Switching (MPLS). DiffServ assigns priority levels to packets, enabling routers to handle congestion more efficiently, while MPLS establishes predefined network paths to minimize delays (
What Is Differentiated Services (DiffServ, or DS)? – Definition from WhatIs.com, n.d.).
Implementing QoS in IPv4 networks presents challenges due to its limited built-in support for traffic prioritization. IPv6 improves upon this by introducing a Flow Label field, allowing for more efficient packet management (
IPv6 Quality-of-Service Capabilities (IPv6 Administration Guide), n.d.). The implementation of IPv6 has remained slow due to migration complexities and lack of incentive to transition. As the Internet continues to expand, integrating QoS into IPv6 and overlay networks will be critical for maintaining seamless connectivity in an increasingly bandwidth-intensive digital landscape.
Sources:
Fortinet. (2023).
What Is QoS (Quality of Service)? Fortinet.
IPv6 Quality-of-Service Capabilities (IPv6 Administration Guide). (n.d.). Docs.oracle.com.
What is Differentiated Services (DiffServ, or DS)? – Definition from WhatIs.com. (n.d.). WhatIs.com.
