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| Section | Weight | Objectives |
|---|---|---|
| OSPF | 15-20% | - Single-area and multi-area configuration and monitoring - LSA types, flooding, and route summarization - Virtual links, authentication, and routing policy - OSPFv2 and OSPFv3 concepts and operation |
| BGP | 20-25% | - Attributes, communities, and multipath routing - Policy-based routing, filtering, and route manipulation - Inter-AS routing and advanced BGP features - iBGP, eBGP, route reflection, and confederations |
| IP Multicast | 10-15% | - Multicast integration with IGP and BGP - RPF check, multicast distribution trees, and troubleshooting - IGMPv2/v3, PIM dense mode, sparse mode, and SSM |
| IS-IS | 15-20% | - IS-IS levels, areas, and operation - DIS operation and routing policy implementation - Configuration and monitoring for single/multi-area - Metrics, route summarization, and route leaking |
| Class of Service (CoS) | 10-15% | - CoS configuration and monitoring in service provider networks - Queue scheduling, shaping, and congestion management - Traffic classification, marking, and policing |
| VPNs and MPLS | 20-25% | - Layer 3 VPNs: VRF, MP-BGP, route distinguishers, targets - Layer 2 VPNs, LDP circuits, VPLS, and EVPN - VPN configuration, monitoring, and troubleshooting - MPLS architecture, LDP, RSVP-TE, and label switching |
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NEW QUESTION # 44
Exhibit
R1 and R8 are not receiving each other's routes
Referring to the exhibit, what are three configuration commands that would solve this problem? (Choose three.)
Answer: B,C,D
Explanation:
The problem in this scenario is that R1 and R8 are not receiving each other's routes because of private AS numbers in the AS path. Private AS numbers are not globally unique and are not advertised to external BGP peers. To solve this problem, you need to do the following:
Configure loops on routers in AS 65412 and advertise-peer-as on routers in AS 64498. This allows R5 and R6 to advertise their own AS number (65412) instead of their peer's AS number (64498) when sending updates to R7 and R8. This prevents a loop detection issue that would cause R7 and R8 to reject the routes from R5 and R62.
Configure remove-private on advertisements from AS 64497 toward AS 64498 and from AS 64500 toward AS 64499. This removes any private AS numbers from the AS path before sending updates to external BGP peers. This allows R2 and R3 to receive the routes from R1 and R4, respectively3.
NEW QUESTION # 45
Exhibit
Which two statements are true about the OSPF adjacency displayed in the exhibit? (Choose two.)
Answer: A,C
Explanation:
The hello interval is the time interval between two consecutive hello packets sent by an OSPF router on an interface. The dead interval is the time interval after which a neighbor is declared down if no hello packets are received from it. These parameters must match between two OSPF routers for them to form an adjacency. In the exhibit, router R1 has a hello interval of 10 seconds and a dead interval of 40 seconds, while router R2 has a hello interval of 30 seconds and a dead interval of 120 seconds. This causes a mismatch and prevents them from becoming neighbors23.
NEW QUESTION # 46
Which two statements are correct about reflecting inet-vpn unicast prefixes in BGP route reflection? (Choose two.)
Answer: A,C
Explanation:
Route reflection is a BGP feature that allows a router to reflect routes learned from one IBGP peer to another IBGP peer, without requiring a full-mesh IBGP topology. Route reflectors do not change any existing BGP attributes by default when advertising routes, unless explicitly configured to do so. A BGP peer does not require any configuration changes to become a route reflector client, only the route reflector needs to be configured with the client parameter under [edit protocols bgp group group-name neighbor neighbor-address] hierarchy level.
NEW QUESTION # 47
Exhibit.
Referring to the exhibit, which path would traffic passing through R1 take to get to R4?
Answer: B
Explanation:
The OSPF cost is carried in the LSAs that are exchanged within an OSPF area. When a router calculates the cost to a destination it uses the cost of the exit interface of each router in the path to the destination.
NEW QUESTION # 48
Exhibit
CE-1 and CE-2 are part of a VPLS called Customer1 No connectivity exists between CE-1 and CE-2. In the process of troubleshooting, you notice PE-1 is not learning any routes for this VPLS from PE-2, and PE-2 is not learning any routes for this VPLS from PE-1.
Answer: C
Explanation:
VPLS is a technology that provides Layer 2 VPN services over an MPLS network. VPLS uses BGP as its control protocol to exchange VPN membership information between PE routers. The route target is a BGP extended community attribute that identifies which VPN a route belongs to. The route target must match on PE routers that participate in the same VPLS instance, otherwise they will not accept or advertise routes for that VPLS.
NEW QUESTION # 49
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