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| Section | Objectives |
|---|---|
| Enterprise Network Design Principles | - Scalability and high availability design - Design methodologies and best practices |
| WAN and Edge Connectivity Design | - Traditional WAN and internet edge design - SD-WAN architecture and design considerations |
| Enterprise Campus Network Design | - Campus LAN architecture - Spine-leaf and hierarchical design models |
| Network Automation and Programmability | - Controller-based networking design - API-driven network automation concepts |
| Security Design in Enterprise Networks | - VPN and perimeter security architecture - Segmentation and access control design |
| Network Services Design | - Routing protocols design (OSPF, EIGRP, BGP) - Multicast and QoS design considerations |
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NEW QUESTION # 190
Which PIM mode uses a shared tree only?
Answer: C
Explanation:
In bidirectional mode, traffic is routed only along a bidirectional shared tree that is rooted at the rendezvous point (RP) for the group.
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipmulti_pim/configuration/xe-16/imc-pim-xe-16- book/imc-tech-oview.html#GUID-51D0D6DF-E7F1-4A0E-8E31-D7ED464DF2AC
NEW QUESTION # 191
A network architect is enabling TV services in the LAN. The source will be streaming to the
239.1.1.1 group IP address. Dense mode is not allowed in the network. Multicast has already been enabled on all network devices in the LAN segment. Which action must the architect take to finalize the design?
Answer: C
NEW QUESTION # 192 
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?
Answer: C
Explanation:
The selected IS-IS design must place the correct routers as Level 1/Level 2 boundary routers so that area failures stay local while traffic can still reach backbone application services. In a hierarchical IS-IS design, Level 1 routers exchange detailed topology only inside their own area. Level 2 routers form the backbone used for interarea connectivity. L1/L2 routers connect the local area to the backbone and advertise reachability between the two levels. Areas 20 and 30 are expected to double in size, and link flaps inside those areas must not impact the backbone. Therefore, the design should keep internal area routers at Level 1 and use only the boundary devices that connect those areas to the backbone as L1/L2. Option A matches that principle by selecting the appropriate boundary routers for interlevel connectivity while avoiding unnecessary L1/L2 adjacencies throughout the topology. The other options either place the wrong routers in Level 2 only or fail to provide a clean transition between local areas and the backbone. Reference topics: IS-IS hierarchy, L1/L2 boundary design, area containment, backbone stability, route leaking.
NEW QUESTION # 193
Which two functions does the control plane node provide in a Cisco SD-Access architecture?
(Choose two.)
Answer: D,E
Explanation:
https://www.ciscolive.com/c/dam/r/ciscolive/us/docs/2018/pdf/BRKEWN-2020.pdf (page 33)
NEW QUESTION # 194
Which feature must be incorporated into the campus LAN design to enable Wake on LAN?
Answer: A
Explanation:
Wake on LAN commonly relies on a magic packet that must reach a sleeping endpoint on its local subnet.
When the WoL server is in a different subnet from the sleeping clients, a unicast packet cannot always be delivered directly because the sleeping host may not have an active ARP entry or IP stack behavior suitable for normal unicast forwarding. Cisco campus designs therefore use IP directed broadcast on the Layer 3 interface for the target VLAN or subnet so a routed packet can be delivered to the subnet and then converted into a Layer 2 broadcast. This must be implemented carefully, with access control, because directed broadcasts can be abused if left unrestricted. Dynamic ARP Inspection and DHCP snooping are Layer 2 security controls; they do not provide the Layer 3 directed broadcast function required for WoL. Proxy ARP allows a router to answer ARP requests on behalf of another host, but it does not solve cross-subnet delivery of WoL magic packets. Therefore, the design must include directed broadcasts on the relevant Layer 3 devices.
NEW QUESTION # 195
......
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