Nokia SRA Composite Exam (4A0-C02) Practice Exam
Nokia SRA Composite Exam (4A0-C02)
Nokia SRA Composite Exam (4A0-C02)
The Nokia Service Routing Architect (SRA) certification is the essential level certification in the SRC program. The SRA certification is created for engineers who have the passion to become an expert in all perspectives of designing, establishing, and supporting Service Router networks and services. In addition to successfully achieving the required exams, the SRA certification needs candidates to pass a one-day practical lab exam.
Course Structure
The list below provides broad guidelines for the type of content that may be included in the Nokia SRA Composite Exam (4A0-C02).
1. BGP
● Describe the basic Internet Architecture and related elements
● Describe the role of BGP in service provider networks
● Demonstrate a sound understanding of BGP mechanics and the role of BGP attributes
● Explain the interaction between BGP and interior gateway protocol (IGP)
● Plan and implement a basic BGP network using Nokia SR OS
● Successfully configure, monitor and troubleshoot a network of multiple BGP peers
● Implement BGP policies in a Nokia environment
● Verify and troubleshoot the results of the policies configurations
● Scale iBGP by deploying confederations or route reflections
● Configure and verify BGP confederations
● Configure and verify BGP route reflections
● Describe the effect of using the advertise-external feature on BGP route propagation
● Explain BGP add-paths feature
● Describe the operation of BGP fast reroute
● Configure and verify BGP advertise-external, add-paths, and FRR on Nokia SR
2. VPLS
● Review Ethernet technology, MPLS features and the terminology of SAPs and SDPs in services
● Using the basic components of services (SAPs and SDPs), create a simple VPLS
● Describe the advantages of a VPLS and configure a VPLS service
● Explain the impacts of MTU on a distributed VPLS service
● Describe the VPLS FDB and list the tools required to maintain the VPLS FDB
● Manage a VPLS infrastructure, and troubleshoot and repair a misconfigured VPLS
● Describe the purpose and operation of policy-based forwarding
● Implement loop control mechanisms such as rapid spanning tree in a VPLS environment
● Define management VPLS (M-VPLS) and how it can be used with STP to provide redundancy and load balancing
● Describe the use of LAG and MC-LAG in providing resiliency in a VPLS configuration
● Describe the use of active and standby pseudowires to achieve redundancy instead of STP
● Explain the key scalability concerns in large VPLS deployments
● Explain the concept of a hierarchical VPLS and its benefits for large VPLS networks
● Explain the concept of PBB (provider backbone bridging) and how it resolves the problem of MAC explosion when connecting to multiple bridging sites
3. VPRN
● Describe the operation of the basic VPRN architecture
● Explain how the VPRN routing information is distributed among Provider Edge (PE) routers, through the use of Multiprotocol BGP extensions
● Identify the cause of BGP loops in a VPRN environment
● Implement loop prevention in VPRN using multiple techniques
● Configure, verify, and troubleshoot VPRN
● Describe the operation of advanced VPRN topologies and services
● Understand full, hub and spoke, and extranet VPRN topologies
● Describe the operation of providing Internet access using various techniques
● Understand the operation of Inter-AS VPRN model A, model B and model C
● Configure, verify and troubleshoot Inter-AS VPNs
● Describe the carrier supporting carrier (CSC) VPN model
● Understand the exchange of routes and the data path in CSC
● Configure, verify and troubleshoot a CSC VPRN
4. QoS
● List the business drivers for QoS
● Describe traffic classification, queuing, scheduling, and marking as they pertain to QoS including, rate limiting, resource allocation, and congestion management
● Configure various QoS-related policies on the Nokia 7750 SR to provide differentiated services confirming to SLAs
● List the criteria that can be used to classify and mark packets at service and network ingress/egress to support optimal use of networking resources
● State the purpose of the queuing and scheduling parameters PIR, CIR, MBS, CBS, High Priority only, queue type, queue mode, and adaptation rule
● State the purpose of Weighted Random Early Detection (WRED) to increase the average utilization of networking resources as they approach congestion
● State the need for a multi-tiered scheduling (HQoS) architecture on SAP ingress and egress
● Apply QoS concepts to the applicable service (virtual private wire service [VPWS], virtual private LAN service [VPLS], virtual private routed network [VPRN], or Internet enhanced service [IES])
● Describe the need for egress port scheduling and its operation in conjunction with an HQoS scheduler
● Explain how standalone policers enforce the configured rate, CIR, MBS, CBS and HPO to color packets
● Explain how Class Fair Hierarchical Policing (CFHP ) supports four layers of hierarchy, and dynamically enforces rates, using the priority, and weights assigned to child policers and arbiters
● Design, configure, apply, and predict the expected behavior of a CFHP policy
● Explain Ethernet queue groups and how they are typically used on access ingress, access egress, network ingress, and network egress
Exam Format
- Exam Name: Nokia SRA Composite Exam
- Exam Number: 4A0-C02
- Number of Questions: 80
- Exam Format: Multiple-choice
- Time Give: 150 minutes
- Requirements: None
- Available languages: English
- Exam Fee: $400 USD
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