300-420 Exam Dumps : Designing Cisco Enterprise Networks (ENSLD) v1.1

StackWise is the correct solution because the company needs more access ports while reusing the existing access-switch uplink capacity. Cisco StackWise allows multiple compatible Catalyst switches to operate as a single logical switching system, increasing access-port density without requiring each added switch to consume new uplink ports on the distribution layer. This fits the design constraint that the distribution switches have no available ports for additional uplinks, while current uplink bandwidth is not a bottleneck. VSS is normally used to combine two chassis-class switches into one logical system at the distribution or core layer; it is not the practical answer for expanding one floor’s access-port count from an existing access switch. EtherChannel aggregates physical links for bandwidth and redundancy, but it does not create additional access ports when no distribution ports are available. VDC is a Nexus virtualization construct and does not solve Catalyst access-port expansion. The correct operational design is to add a stack member and use the existing uplink design. Reference topics: Cisco StackWise, access-layer scalability, uplink preservation, Catalyst campus switching.

The IPv4 network 172.16.10.0/24 maps to 2001:db8:abcd::ac10:a00/120 when the IPv4 address is placed into the lowest significant bits of the IPv6 address. The calculation converts each IPv4 octet into hexadecimal: 172 is AC, 16 is 10, 10 is 0A, and 0 is 00. Combining those bytes gives AC10:0A00, displayed in IPv6 notation as ac10:a00. Because a /24 IPv4 network has 8 host bits, the mapped IPv6 network leaves the same 8 host bits, resulting in a /120 IPv6 prefix. Option B incorrectly places decimal IPv4 octets into separate IPv6 hextets and uses /96, which represents a much larger mapping block than the /24 network. Option C does not represent 172.16.10.0 in hexadecimal. Option D changes the higher-order IPv6 prefix and does not match the supplied address plan. The correct address therefore preserves the planned IPv6 prefix and embeds the IPv4 network in the low-order bits. Reference topics: IPv4-to-IPv6 address mapping, hexadecimal conversion, IPv6 prefix length, migration addressing plans.

A major SaaS challenge is the lack of direct application and infrastructure control. With Software as a Service, the provider operates the application stack, platform, upgrades, and supporting infrastructure. The customer benefits from reduced maintenance burden and lower initial deployment cost, but gives up much of the direct control normally available with on-premises applications. This affects troubleshooting, change windows, performance visibility, customization, data residency controls, and integration with existing enterprise systems. Higher initial costs are usually not a SaaS characteristic; SaaS commonly shifts spending toward subscription operating expense. Client computer upgrades are not normally required in the same way as thick-client enterprise software. Data and application integration can be complex, but the option that best captures the core architectural challenge is reduced control over the application and infrastructure. Network architects must account for this by designing secure direct internet access, cloud monitoring, identity integration, and reliable paths to SaaS providers. Reference topics: SaaS architecture, cloud application control, enterprise cloud access, operational visibility, SD-WAN SaaS design.