CCNP Service Provider is a professional-level certification offered by Cisco Systems that validates advanced knowledge and skills required to work with service provider networks — large-scale network infrastructures used by ISPs, telcos, and other organizations that offer network-based services to customers.
List of Top CCNP Service Provider Interview Questions
Q1. Explain the term Metro Ethernet?
Q2. How much increase is required in MTU while configuring the 802.1q VLAN tag and why?
Q3. What standards are suggested by IEEE for Metro Ethernet?
Q4. Explain the structure of MPLS header?
Q5. Describe how forwarding works in MPLS?
Q6. Differentiate between NAT64 (Stateless and Stateful)?
Q7. Differentiate between VPN and MPLS?
Q8. What mode is used to enable MPLS LDR GR?
Q9. What command is used to enable LDP on all interfaces configured for MPLS?
Q10. Differentiate between IOS XR, IOS and IOS XE?
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Q11. What are the advantages of a multi-layer control plane?
Q12. What are the best practices to be followed while securing a LAN network using prefix list?
Q13.Differentiate between Access list vs Prefix list?
Q14. Multiple optical signals are combined in Dense wavelength division multiplexing (DWDM) using?
Q15. Differentiate between Wavelength Division Multiplexing (WDM) vs Dense wavelength division multiplexing (DWDM)?
Q16. Describe NFV architecture.
Q17. Differentiate between VNF and CNF?
Q18. Which component handles storage in OpenStack?
Q19. What is the role of an API server in OpenStack?
Q.20. Differentiate between OSPFv2 and OSPFv3.
Q21. What command is used to identify if OSPF neighbours have duplicate Router IDs?
Q22. Which multicast protocol allows to connect two separate multicast domains?
Q23. Differentiate between DiffServ and IntServ QoS models.
Q24. What attributes are used in BGP to prevent loops in route reflector environments?
Q25. List down BGP ttl security features?
Q26. What priority assignment value of congestion control traffic in IPv6 header related to ‘Attended bulk data traffic’?
Q27. Describe flow label in IPv6 header?
Q28. An OSPF interface by default advertises to all its prefixes in LSA. How can you suppress interfaces from advertising all its prefixes?
Q29. What RPF checks are performed when a multicast packet arrives at a router?
Q30. 232.0.0.0/8 multicast group range is reserved for what?
Q31. Differentiate between Any source multicast vs Source specific multicast.
Q32. AAAA records are used for which type of DNS records?
Q33. High availability multicast is provided using which two features?
Q34. Carrier grade NAT is used by service providers for what purpose in IPv6/IPv4 networks?
Q35. Embedded RP feature is used in IPv6 multicast for what purpose?
Q36. What is the purpose of bgp graceful-restart command?
Q37. You are configuring IPv6 traffic routing to IPv4 and have set the below configuration but when you perform testing you find that IPv6 traffic is not passing to IPv4 network? What could be a potential issue here?
Sample Configuration
Interface Tunnel1
Ipv6 address 2001:db8:3::1/64
Tunnel source GigabitEthernet0/0
Tunnel destination 192.168.102.5
Tunnel mode ipv6ipQ38. Refer below configuration and indicate its purpose?
Sample Configuration
Interface Gi0/0
Ip multicast boundary 1
!
Access-list 1 deny 224.0.1.26
Access-list 1 deny 224.0.1.27
!Q39. What tunnelling mechanisms are available in IPv6?
Q40. What are different multicast service models and its features in short?
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Q41. In BGP route dampening configuration what does value ‘2400’ indicate?
Q42. What are the prerequisites to setup OSPF neighbour relationship?
Q43. While troubleshooting connectivity issues in the MPLS network what table we need to refer to analyse forwarding behaviour of packets?
Q44. Differentiate between RIB, FIB, LFIB, and LIB in MPLS.
Q45. What TCP port is used by Multicast Source Discovery Protocol (MSDP) for peering connections?
Q46. Look at below configuration and state the problem with 9.1.6.6
Sample Configuration
Router1#Sh ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
9.1.3.3 1 FULL/BDR 00:00:13 9.1.232.3 Ethernet0/.232
9.1.4.4. 1 FULL/DR 00:00:14 9.1.232.4 Ethernet0/.232
9.1.5.5 1 LOADING 00:00:11 9.1.232.5 Ethernet0/.232
9.1.6.6 1 2WAY/DROTHER 00:00:11 9.1.232.6 Ethernet0/.232Q47. In which routing configuration an ordered list of segments is encoded in a routing extension header?
Q48. What steps are missed in below configuration to complete source-specific multicast (SSM) implementation?
Sample Configuration
Ip pim sm
Interface g2/0/0
Ip pim sparse-mode Q49. When you are redistributing routes from BGP to OPPF what is the default cost available?
Q50. In below sample configuration what is missing due to which router 1 which has neighbor relationship with router 2 but only router 1 classful EGRP routes can be seen on router 2.
Sample Configuration
Router 1:
Router1(config-router) #Router OSPF 20
Router1(config-router) #Redistribute eigrp 1
Router1(config-router) #Network 192.168.0.0.0 0.0.0.255 area 1ABOUT THE AUTHOR
You can learn more about her on her linkedin profile – Rashmi Bhardwaj
