Cisco 300-540 Exam Dumps

Comprehensive and Detailed Explanation From Cisco NSO Orchestration Knowledge

In Cisco NSO deployments:

ncs-setup is only used once, during initial NSO instance creation.

ls -l nso-instance/packages/ simply lists packages --- not used to start NSO.

ncs -status checks status but does not run NSO.

To actually start the NSO service so that device packages (including ASAv service packages) can be loaded and orchestration can begin, the correct command is:

ncs

This launches the NSO runtime and loads all configured packages, enabling the SaaS ASAv service.

In the diagram, the PE and R2, R3, R4, R5 belong to AS 100. The PE router runs BGP process AS 100, so its BGP configuration must start with:

router bgp 100

To perform iBGP multipath load sharing across three equal-cost internal BGP paths, BGP must be instructed to keep and use multiple iBGP paths in the routing table. This is done with:

router bgp 100

maximum-paths ibgp 3

maximum-paths ibgp 3 tells BGP to install up to three iBGP paths to the same prefix, enabling CEF to load-share across those paths.

router bgp 100 is required because the PE is in AS 100, not 101.

Other options:

ip load-sharing per-destination affects CEF behavior but does not enable BGP iBGP multipath by itself and is not specific to three iBGP paths.

ip load-sharing ibgp 3 is not a valid IOS BGP command.

router bgp 101 would configure the wrong AS and break the iBGP relationships shown in AS-100.

Thus, the correct commands on the PE to achieve iBGP multipath load sharing over the three internal paths are maximum-paths ibgp 3 and router bgp 100, corresponding to A and E.

Comprehensive and Detailed Explanation

Cloud interconnects that support BGP peering must provide a routed Layer-3 adjacency capable of exchanging routing information dynamically. In major cloud architectures:

AWS Direct Connect supports private virtual interfaces (VIFs) where BGP is used between the customer router and AWS to exchange routes.

Azure S2S VPN uses IPsec tunnels with static routing by default; BGP is optional only with specific gateway SKUs, but the question expects the standard, universally correct answer, which is Direct Connect.

Azure Bastion is a remote-access management service and does not support BGP.

AWS-managed VPN uses IPsec tunnels with BGP optional, but in exams, the recognized cloud service specifically associated with BGP support is Direct Connect.

In service provider cloud interconnect design, AWS Direct Connect is the standard, well-defined offering that provides layerized WAN connectivity with BGP support.

Comprehensive and Detailed Explanation (Cisco SP Cloud Knowledge)

The requirement describes:

Secure communication between sites or devices

Protection from eavesdropping over the Internet

Cryptographic tunnels

End-to-end authentication and encryption

This exactly matches the purpose of an IPsec VPN, which provides:

Encrypted secure tunnels

Authentication and integrity protection

Confidentiality even across untrusted networks such as the Internet

Other options do not provide encrypted peer-to-peer channels:

AWS Direct Connect private link to AWS, not peer-to-peer encryption

Segment Routing traffic engineering, not security

Transit VPC routing architecture, not encryption

Thus the correct answer is IPsec VPN.

Comprehensive and Detailed Explanation

For distances greater than 20 miles, valid inter-facility transport options must support:

Metro-scale connectivity

High bandwidth

Low latency

Carrier-grade reliability

A carrier access Ethernet ring (MEN / Metro Ethernet) is designed for:

Interconnecting data centers or meet-me rooms

Distances far exceeding 20 miles

High-availability layer-2 or layer-3 transport

Why the others are invalid:

CAT6e maximum ~100 meters

Multimode fiber typically <2 km (~1.25 miles)

Private wireless not used for high-capacity DC interconnects, unreliable for core transport

Thus, the only correct carrier-grade method is Carrier access Ethernet ring.