Question 1       What is MPLS?

Question 2       Why MPLS is called as Multi-Protocol Label Switching?

Question 3       Why MPLS is called as Layer 2.5 Technology?

Question 4       What are the applications of MPLS?

Question 5       What are the advantages of MPLS?

Question 6       What is LDP?

Question 7       What is MPLS and why it is being so popular in short time?

Question 8       What is the protocol used by MPLS?

Question 9       MPLS works on which layer?

Question 10     What is the difference between P and PE router?

Question 11     Can I make my PE router as P?

Question 12     Two routers are having 4 equal cost links, how many LDP sessions will be established?

Question 13     My LDP router id, OSPF router id and BGP router id is different, will it work to forward the traffic of customers or not?

Question 14     What is Penultimate Hop Popping and why it is required? Which router performs the PHP function?

Question 15     I am receiving aggregate label, what does it mean?

Question 16     What are the different types of labels?

Question 17     How to make customer route unique?

Question 18     What is the difference between RD and RT?

Question 19     Can I assign a same RD to two different customers?

Question 20     Is RD travels in route update?

Question 21     My customer is having three branches and all are attached to three different PEs, In this case can I use the different VRF names?

Question 22     What is downstream on demand?

Question 23     How to filter MPLS labels?

Question 24     What is the default range of MPLS labels in Cisco routers? How to extend that range?

Question 25     Without route reflector can I implement MPLS?

Question 26     What is the difference between VPNv4 and IPv4 address family?

Question 27     What is MP-iBGP? Can we use normal BGP in lieu of MP-iBGP?

Question 28     What is LIB, LFIB?

Question 29     What is CEF and without enabling CEF, can we make MPLS work?

Question 30     I am receiving end to end customer routes on various PE but not able to ping those routes, what’s could be the problem?

Question 31     What is explicit null and implicit null?

Question 32     Default timers of LDP?

Question 33     Does LDP require OSPF, IS-IS or BGP?

Question 34     In neighbor discovery command, I am receiving only xmit, what does it mean?

Question 35     What is transport address?

Question 36     What is the RFC of MPLS?

Question 37     Why MPLS is called multi-protocol?

Question 38     What is the difference between MPLS, SSL and IPSec?

Question 39     I am using different vendor products and want to implement TDP, what type of challenges will you face?

Question 40     What is the MFA Forum?

Question 41     What MPLS related mailing lists are there and what are they used for?

Question 42     How did MPLS evolve?

Question 43     What problems does MPLS solve?

Question 44     What is the status of the MPLS standard?

Question 45     What is a Label?

Question 46     What is a Label Switch Path?

Question 47     What is a Label Distribution Protocol?

Question 48     What’s the difference between CR-LDP and RSVP-TE

Question 49     What is a “Forwarding Equivalency Class”?

Question 50     How are Label Switch Paths built?

Question 51     What other protocols does MPLS support besides IP?

Question 52     What are the differences between MPLS and ATM?

Question 53     Does MPLS replace ATM?

Question 54     What is “Ships in the night”?

Question 55     What does MPLS traffic engineering accomplish?

Question 56     What are the components of MPLS-TE?

Question 57     How does MPLS merge traffic flows?

Question 58     How loops are prevented in MPLS networks?

Question 59     How does MPLS perform failure recovery?

Question 60     What differences are there in running MPLS in OSPF versus IS-IS environments?

Question 61     Can there be two or more Autonomous Systems within the same MPLS domain?

Question 62     How does MPLS enable VPNs?

Question 63     What alternatives are there for implementing VPNs over MPLS?

Question 64     What is the “Martini Draft’?

Question 65     What is a “Layer 2 VPN”?

Question 66     What is a Virtual Private LAN Service (VPLS)?

Question 67     Are MPLS-VPNs secure?

Question 68     What kinds of QoS protocols does MPLS support?

Question 69     How do I integrate MPLS and DiffServ?

Question 70     How do I integrate MPLS and ATM QoS?

Question 71     What is “Generalized MPLS” or “GMPLS”

Question 72     What are the components of GMPLS?

Question 73     What are the features of GMPLS?

Question 74     What are the “Peer” and “Overlay” models?

Question 75     What is the “Optical Internetworking Forum”?

Question 76     Can voice and video traffic be natively encapsulated into MPLS?

Question 77     How are MPLS networks managed?

Question 78     Are there any MPLS-specific MIBs?

Question 79     Is there open source MPLS code to test MPLS?

Question 80     What shows and conferences provide information on MPLS?

Question 81     Are there any labs that are performing MPLS interoperability testing?

Question 82     Does MPLS support IPv6?

Question 83     Can I use the existing IPv4 MPLS backbone for IPv6?

Question 84     Define various troubleshooting commands in MPLS?

Question 85     What is adjacency table?

Question 86     Difference between MPLS IP and MPLS Label Protocol LDP command?

Question 87     If MPLS get disable, will it harm my IGP or IPv4 traffic?

Question 88     What is MPLS-TP?

Question 89     What is downstream and upstream router in MPLS? 44. Difference between MPLS and MPLS-TP?

Question 90     How does LDP Initializes?

Question 91     What is Cell Mode MPLS over ATM?

Question 92     Difference Between VC Based Multiplexing And Logical Link Control Encapsulation in ATM?

Question 93     Basics of ATM?

Question 94     ATM is packet or circuit switching?

Question 95     Is LDP Required for VPNv4 Labels?

Question 96     What will happen if you see your PE loopback in vpnv4 table?

Question 97     What is Bidirectional Forwarding Detection?

Question 98     Different types of Pseudo Wire?

Question 99     Modes of EoMPLS (Ethernet over MPLS)

Question 100   What is L2VPN over Metro Ethernet?

Question 101   What is E-VPN (Ethernet VPN)?

Question 102   What is FEC in traditional IP routing and MPLS?

Question 103   How does CEF understand overlapping of ip addresses?

Question 104   What is the difference between Optimum, Fast and CEF Switching?

Question 105   Define CEF FIB table entries.

Question 106   What is the port number used by LDP?

Question 107   What are the prerequisites to run MPLS?

Question 108   What is penultimate hop popping?

Question 109   What are the functions done by MPLS?

Question 110   What is the difference between Per Platform Label Space and Per Interface Label Space?

Question 111   Is summarization is recommended in MPLS?

Question 112   What is TTL Propagation in MPLS?

Question 113   What is LDP IGP Synchronization?

Question 114   What is the difference between Implicit Null and Explicit Null?