CCIE SP OEQ 1

CCIE SP OEQ HERE WE GO !

Q1.
Name 3 advantages of running MPLS in a service provider network

Q2.
What are the advantages of the MPLS VPN solution for the service provider over all the other VPN solutions?

Q3.
Name 4 technologies that can be used to carry IP over ATM

Q4.
Name 2 pre-MPLS protocols that use label switching

Q5.
What do the ATM switches need to run so that they can operate MPLS?

Q6.
How do you ensure optimal traffic flow between all the customer sites in an ATM or Frame Relay overlay network?

Q7.
Name the 4 fields that are part of a MPLS label

Q8.
How many labels can reside in a label stack?

Q9.
In which layer does MPLS fit in the OSI reference model?

Q10.
Which table does an LSR use to forward labeled packets?

Q11.
What type of interface in cisco IOS use the DoD label distribution mode and the per-interface label space?

Q12.
Why does the MPLS label have a TTL field?

Q13.
What does the push operation do on a labeled packet?

Q14.
Which cisco IOS command do you use to see what the swapped label is and which labels are pushed onto a received packet for a certain prefic?

Q15.
What does the outgoing label entry of "Aggregate" in the LFIB of a cisco IOS  LSR mean?

Q16.
What label value signals the penultimate LSR to use PHP

Q17.
What is the fundamental purpose of LDP?

Q18.
Name 4 main functions that LDP takes care of

Q19.
How can you reduce the number of label bindings on an LSR?

Q20.
What problem does MPLS LDP-IGP synchronization solve?

Q21.
What do you need to configure to protect the LDP sessions against attacks?

Q22.
What does LDP session protection use to protect an LDP session?

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A1.
- BGP free core
- MPLS VPN
- TE

A2.
easy provisioning of sites and optimal traffic flow in the core network

A3.
- RFC 1483
- LANE
- MPOA
- MPLS

A4.
ATM and frame-ralay

A5.
IP routing protocol and LDP

A6.
needing full mesh of  VCs

A7.
- label
- exp
- bos
- ttl

A8.
any number you want

A9.
no category of the OSI reference model or layer 2.5
 
A10.
LFIB

A11.
LC-ATM interfaces

A12.
loop prevention

A13.
pushs one or more labels onto the label stack

A14.
show mpls forwarding-table

A15.
LSR removes the labels and does an IP lookup

A16.
3,the implicit NULL label

A17.
distribute label bindings

A18.
- discovery LDP running LSR
- session establishment
- advertising of label mappings
- housekeeping by means of notification

A19.
controling the advertisement of label bindings via LDP in the outbound direction, or filtering the incoming label bindings

A20.
labeled packets dropping

A21.
MD5 authentication for the LDP neighbor

A22.
targeted LDP session