MPLS Network MCQs

MPLS Network MCQs contain set of 10 MPLS Network MCQ questions with answers which will help you to clear beginner level quiz.



1. When implementing MPLS Layer 3 VPNs with customers running OSPF as the CEPE routing protocol, which situation will require a sham link to be implemented in the MPLS backbone?
A. to connect customer sites in different OSPF areas
B. to connect customer sites in the same OSPF area
C. to prevent OSPF routing loops when a customer site has redundant CE-PE connections
D. if there is a backdoor link between the CE routers, to ensure that the backdoor link is used only to back up the primary connection through the MPLS VPN

2. When implementing MPLS Layer 3 VPNs with customers running OSPF as the CEPE routing protocol, the service provider MPLS backbone looks like what to the CE routers?
A. the backbone (Area 0)
B. an external routing domain
C. a superbackbone that is transparent to the CE OSPF routers
D. a transit area (similar to a transit area for supporting virtual links)

3. Which Cisco IOS XR BGP configuration command is required to enable MP-BGP to carry IPv6 VPN routes?
A. address-family ipv4 unicast
B. address-family ipv6 unicast
C. address-family vpnv4 unicast
D. address-family vpnv6 unicast
 
4. Which two statements regarding Cisco 6PE operations are correct? (Choose two.)
A. The top label in the label stack is assigned by MP-BGP, and it is used to reach the egress PE.
B. The inner label in the label stack is assigned by MP-BGP, and it is used for IPv6 forwarding at the egress PE.
C. The top label in the label stack is assigned by LDP, and it is used to reach the egress PE.
D. The inner label in the label stack is assigned by LDP, and it is used for IPv6 forwarding at the egress PE.

5. In MPLS Layer 3 VPN implementations, which mechanism is used to control which routes are imported to a VRF?
A. RT
B. RD
C. VC ID
D. PW ID
E. VRF ID

6. Within the service provider IP/MPLS core network, what must be implemented to enable Layer 3 MPLS VPN services?
A. IS-IS or OSPF on all the PE and P routers
B. MP-BGP between the PE routers
C. RSVP on all the PE and P routers
D. targeted LDP between the PE routers
E. LDP between the CE and PE routers
 
7. In MPLS Layer 3 VPN implementations, what is used on the PE router to isolate potential overlapping routing information between different customers?
A. route targets
B. VRFs
C. VC IDs
D. pseudowire IDs
E. pseudowire classes

8. Which MP-BGP address family must be configured to use VPLS autodiscovery in a Cisco IOS XR router?
A. address-family l2vpn vpls-vpws
B. address-family vpnv4 unicast
C. address-family ipv4 mdt
D. address-family ipv4 tunnel
E. address-family vpls vfi

9. Which flavor of MPLS Layer 3 VPN has MPLS enabled on PE-CE links?
A. basic
B. CSC
C. inter-AS
D. AToM
E. VPLS
 
10. What is the primary difference between 6PE and 6VPE?
A. 6VPE does not require an MPLS core.
B. 6VPE requires an IPv6-aware core.
C. 6VPE provides IPv6 VPN services.
D. 6VPE tunnels IPv6 packets inside IPv4 packets.