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| Section | Objectives |
|---|---|
| Topic 1: Security Design in Enterprise Networks | - Segmentation and access control design - VPN and perimeter security architecture |
| Topic 2: Network Automation and Programmability | - API-driven network automation concepts - Controller-based networking design |
| Topic 3: Enterprise Network Design Principles | - Scalability and high availability design - Design methodologies and best practices |
| Topic 4: Enterprise Campus Network Design | - Spine-leaf and hierarchical design models - Campus LAN architecture |
| Topic 5: Network Services Design | - Routing protocols design (OSPF, EIGRP, BGP) - Multicast and QoS design considerations |
| Topic 6: WAN and Edge Connectivity Design | - SD-WAN architecture and design considerations - Traditional WAN and internet edge design |
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NEW QUESTION # 113
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?
Answer: C
Explanation:
Explanation
For example:
Site 0001
Data:10.0.0.0/24
Voice: 10.0.1.0/24
summary route : 10.0.0.0/23
Site 0002
Data:10.0.2.0/24
Voice: 10.0.3.0/24
summary route: 10.0.2.0/23
cont...
site 0129
Data:10.1.0.0/24
Voice: 10.1.1.0/24
summary route: 10.1.0.0/23
site 0130
Data:10.1.2.0/24
Voice: 10.1.3.0/24
summary route: 10.1.2.0/23
so 3rd octet is odd number assigned to voice, and even number assigned to data; for security team to recongize voice prefix, use an ACL with wildcast to filter odd number on third octet, started from 10.0.1.0 0.0.254.255, 10.1.1.0 0.0.254.255......, 10.1.1.0 0.0.254.255 etc; for 10.0.1.0 0.0.254.255, any IP in binary that started with 00001010.00000000.xxxxxxx1.xxxxxxxx will be matched (x = either 0 or 1), covert 3rd octet into dec, for example, 10000001 = 129 which is a voice VLAN.
NEW QUESTION # 114
An organization is designing a detailed QoS plan that limits bandwidth to specific rates. Which two parameters are supported be the traffic policing feature? (Choose two.)
Answer: A,B
NEW QUESTION # 115 
Refer to the exhibit. An architect is designing a network that requires route redistribution. The design must prevent route feedback and the creation of routing loops. The OSPF domain is using default metrics, and the IS-IS domain is using narrow metrics. Which solution must the architect select?
Answer: B
Explanation:
Route tagging with a route map is the correct redistribution loop-prevention method. In a design with mutual redistribution between OSPF and IS-IS, a route learned from one domain can be redistributed into the other domain and then fed back into the original domain at another redistribution point. This creates route feedback, suboptimal routing, or loops. Cisco routing design commonly prevents this by tagging routes at the point of redistribution and then filtering or denying routes with that tag when they are seen again at another redistribution boundary. A route map can set the tag during redistribution and match the tag on the reverse redistribution direction. Changing administrative distance may influence local route selection, but it does not reliably prevent feedback throughout the network. Stub areas reduce external LSA scope in OSPF, but they do not solve a multipoint redistribution loop between OSPF and IS-IS. Prefix filtering can work, but tagging scales better and preserves route identity across redistribution points. Reference topics: route redistribution, route tagging, route maps, OSPF, IS-IS, loop prevention.
NEW QUESTION # 116 
Refer to the exhibit. Company A acquired Company B, and the companies want to use the same shared core.
However, the companies must not learn each other ' s prefixes. Which two address family solutions meet these requirements? Choose two.
Answer: C,D
Explanation:
The correct design uses IPv4 unicast for Company A and Company B and VPNv4 in the shared core. In an MPLS Layer 3 VPN architecture, customer edge routing toward the provider edge commonly uses the ordinary IPv4 unicast address family. The PE router then places the learned customer routes into the appropriate VRF. Across the shared provider core, MP-BGP carries those customer routes as VPNv4 prefixes by adding route distinguishers, which keep identical or overlapping customer prefixes unique. Route targets then control which VRFs import or export each route. Cisco describes this VRF and VPNv4 model as the mechanism that prevents one VPN customer from learning another customer's prefixes while sharing the same provider backbone. VPNv4 is not normally used directly between the customer networks and their CE- facing sessions. Therefore, the customer sides use IPv4 unicast, and the shared core uses VPNv4 to preserve separation. Reference topics: MPLS Layer 3 VPN, MP-BGP VPNv4, VRF, route distinguisher, route targets, customer route isolation.
NEW QUESTION # 117
Which function do reverse path forwarding mechanisms perform in a multicast deployment?
Answer: A
Explanation:
Explanation
Reverse path forwarding (RPF) mechanisms are used to prevent loops and duplicate packets in multicast deployments [1]. The RPF check verifies that all multicast traffic received on a router is sourced from the expected direction, ensuring that multicast traffic is not looped back in the network. The RPF check works by comparing the source IP address of a multicast packet with the routing table, and only forwarding it if it matches the expected entry.
NEW QUESTION # 118
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