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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: IP Multicast | 10-15% | - IGMPv2/v3, PIM dense mode, sparse mode, and SSM - Multicast integration with IGP and BGP - RPF check, multicast distribution trees, and troubleshooting |
| Topic 2: BGP | 20-25% | - Policy-based routing, filtering, and route manipulation - iBGP, eBGP, route reflection, and confederations - Attributes, communities, and multipath routing - Inter-AS routing and advanced BGP features |
| Topic 3: VPNs and MPLS | 20-25% | - Layer 2 VPNs, LDP circuits, VPLS, and EVPN - Layer 3 VPNs: VRF, MP-BGP, route distinguishers, targets - VPN configuration, monitoring, and troubleshooting - MPLS architecture, LDP, RSVP-TE, and label switching |
| Topic 4: OSPF | 15-20% | - Single-area and multi-area configuration and monitoring - Virtual links, authentication, and routing policy - LSA types, flooding, and route summarization - OSPFv2 and OSPFv3 concepts and operation |
| Topic 5: Class of Service (CoS) | 10-15% | - Queue scheduling, shaping, and congestion management - CoS configuration and monitoring in service provider networks - Traffic classification, marking, and policing |
| Topic 6: IS-IS | 15-20% | - IS-IS levels, areas, and operation - DIS operation and routing policy implementation - Metrics, route summarization, and route leaking - Configuration and monitoring for single/multi-area |
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NEW QUESTION # 83
Which statement is correct about IS-IS when it performs the Dijkstra algorithm?
Answer: C
NEW QUESTION # 84
A router running IS-IS is configured with an ISO address of 49.0001.00a0.c96b.c490.00.
Which part of this address is the system ID?
Answer: A
Explanation:
In IS-IS (Intermediate System to Intermediate System) routing, each router is identified by a unique ISO (International Organization for Standardization) address, also known as a Network Entity Title (NET). The NET consists of three parts:
1. **Area Identifier**: Indicates the area to which the router belongs.
2. **System Identifier**: Uniquely identifies the router within the area.
3. **NSAP Selector (NSEL)**: Typically set to 00 for a router, indicating the Network Service Access Point.
The format of the ISO address is `49.XXXX.YYYY.YYYY.ZZZZ.ZZZZ.00`, where:
- `49` is the AFI (Authority and Format Identifier) indicating a private address.
- `XXXX` is the Area Identifier.
- `YYYY.YYYY.YYYY` is the System Identifier.
- `ZZZZ.ZZZZ` is the NSAP Selector.
Given the address `49.0001.00a0.c96b.c490.00`:
- **Area Identifier**: `49.0001`
- **System Identifier**: `00a0.c96b.c490`
- **NSAP Selector**: `00`
**Explanation**:
- **A. 00a0.c96b.c490 is the system identifier**:
- Correct. The System Identifier in an ISO address is a 48-bit (6-byte) field used to uniquely identify the router. In this address, `00a0.c96b.c490` is the correct 6-byte System Identifier.
- **B. 0001.00a0.c96b.c490 is the system identifier**:
- Incorrect. This includes the Area Identifier as part of the System Identifier, which is not correct.
- **C. c96b.c490 is the system identifier**:
- Incorrect. This is only part of the System Identifier. The full System Identifier must be 6 bytes long.
- **D. c490 is the system identifier**:
- Incorrect. This is an incomplete and incorrect part of the System Identifier.
**Conclusion**:
The correct part of the address that represents the System Identifier is:
**A. 00a0.c96b.c490 is the system identifier.**
**References**:
- Juniper Networks Documentation on IS-IS: [IS-IS Configuration](https://www.juniper.net/documentation
/en_US/junos/topics/task/configuration/isis-configuring.html)
- ISO/IEC 10589, the IS-IS routing protocol standard.
NEW QUESTION # 85
By default, which statement is correct about OSPF summary LSAs?
Answer: A
Explanation:
Explanation
OSPF uses different types of LSAs to describe different aspects of the network topology. Type 1 LSAs are also known as router LSAs, and they describe the links and interfaces of a router within an area. Type 3 LSAs are also known as summary LSAs, and they describe routes to networks outside an area but within the same autonomous system (AS). By default, OSPF will summarize routes from Type 1 LSAs into Type 3 LSAs when advertising them across area boundaries .
NEW QUESTION # 86
Refer to the exhibit.
Click the Exhibit button.
You have an OSPF environment. You have recently added a router called R4 that is directly connected to R1 and R2. You discover that R4 is only peering with R2.
Referring to the exhibit, how would you correct the peering?
Answer: D
NEW QUESTION # 87
You are configuring anycast RP for load balancing and redundancy in your PIM-SM domain. You want to share active sources between RPs.
In this scenario, what are two solutions that will accomplish this task? (Choose two.)
Answer: B,C
Explanation:
In a PIM Sparse Mode (PIM-SM) domain, Anycast RP is used for load balancing and redundancy by configuring multiple RPs with the same IP address. However, for active multicast sources to be shared between RPs, an additional mechanism is needed since PIM-SM does not automatically synchronize sources between RPs.
Evaluating the Answer Choices
Option A: "Configure MSDP on each RP router." ✅
Multicast Source Discovery Protocol (MSDP) is required in an Anycast RP setup to share active source information between RPs.
MSDP allows RPs to exchange source-active (SA) messages, ensuring that multicast receivers in different regions can still receive traffic from sources registered with different RPs.
Juniper Documentation confirms that MSDP is used to synchronize active sources across multiple RPs in an Anycast RP deployment.
✅ This is a correct answer.
Option B: "Configure anycast PIM with the rp-set statement on each RP router." ✅ Anycast PIM allows multiple RPs to share the same IP address, and the rp-set statement is used to define the set of Anycast RPs.
This enables receivers and sources to register with the closest RP.
However, Anycast PIM alone does not share active source information between RPs; MSDP is still needed for that.
The combination of Anycast PIM (rp-set) and MSDP is the correct approach.
✅ This is a correct answer.
NEW QUESTION # 88
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