Cisco 300-420 - Designing Cisco Enterprise Networks (ENSLD)
An engineer is designing an IPv4 addressing plan for an enterprise with 1000 branches. Each branch requires a prefix for data and a prefix for voice. Each prefix must accommodate up to 128 hosts, and prefixes must facilitate summarization at aggregation points in the network. The security team requires a simple method for identifying voce prefixes. Which allocation does the engineer recommend from the RFC1918 address space?
An architect is designing a network for an enterprise site. The design must use an active/backup design for the WAN. It must guarantee the SLA for several applications regardless of which connection is used. Which deployment model should the architect choose?
Refer to the exhibit. An architect is designing a hierarchical ISIS solution for a customer with these requirements:
Routers will double In all areas within the next 24 months.
Link flaps within areas 20 and 30 must not impact the backbone area.
Traffic originating from A201 and A302 routers must connect to application servers in the backbone.
Which design must the architect select?
When expanding an existing Cisco SD-Access network, in addition to the control plane, which two device roles are needed to create an additional fabric site? (Choose two.)
What is the purpose of a Cisco SD-Access underlay network?
Refer to the exhibit. An engineer proposed this solution for a company that requires a loop-free. Layer 2 network design. The network will run 802.1W, and all links will be 1 Gbps. If all interfaces are up as point- to-point adjacencies, what are the expected port end states based on the design?
Which feature is required for graceful restart to recover from a processor failure?
Refer to the exhibit. Area 10 is a regular OSPF area and networks 10.1.1.0/24 and 172.16.1.0/24 are internal. Which design provides optimal routing between both networks when the link between routers C and E fails?
Which two steps can be taken to improve convergence in an OSPF network? (Choose two.)
An engineer must design a scalable QoS architecture that allows the separation of the traffic into classes on predefined business requirements. The design must also utilize the differentiated services code points as the QoS priority descriptor value and support at least 10 levels of classification. Which QoS technology should the engineer include in the design?
