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| Section | Objectives |
|---|---|
| Topic 1: Network Services Design | - Routing protocols design (OSPF, EIGRP, BGP) - Multicast and QoS design considerations |
| Topic 2: Enterprise Campus Network Design | - Campus LAN architecture - Spine-leaf and hierarchical design models |
| Topic 3: Security Design in Enterprise Networks | - VPN and perimeter security architecture - Segmentation and access control design |
| Topic 4: Network Automation and Programmability | - API-driven network automation concepts - Controller-based networking design |
| Topic 5: WAN and Edge Connectivity Design | - SD-WAN architecture and design considerations - Traditional WAN and internet edge design |
| Topic 6: Enterprise Network Design Principles | - Scalability and high availability design - Design methodologies and best practices |
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NEW QUESTION # 316
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.)
Answer: B,E
NEW QUESTION # 317
Refer to the exhibit. An architect is designing an IPv4 plan using the 172.16.0.0/16. The design must maximize the number of subnets while meeting these requirements:
- 500 hosts within the server room
- 100 hosts at the remote site
- 25 hosts at the access site
Which plan must the architect choose?
Answer: D
NEW QUESTION # 318 
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?
Answer: D
Explanation:
The expected port state follows Rapid Spanning Tree Protocol role selection on equal-speed point-to-point links. With 802.1w, each non-root switch selects one root port based on the lowest path cost to the root bridge. Where there are redundant Layer 2 paths of equal speed, one side of a redundant segment must remain blocked as an alternate port to maintain a loop-free topology. Because all links are 1 Gbps, path cost is equal unless bridge priority, bridge ID, or port ID breaks the tie. The selected option identifies the port pair that becomes alternate blocking based on the root placement and tie-breakers shown in the exhibit. RSTP improves convergence compared with classic 802.1D by using proposal and agreement handshakes on point- to-point links, but it still blocks redundant paths when a pure Layer 2 loop exists. A design requiring all links to forward would need a routed access design, MEC, StackWise Virtual, VSS, or another loop-free multipath technology. Reference topics: RSTP, root port, designated port, alternate port, point-to-point links, Layer 2 loop prevention.
NEW QUESTION # 319
You have executed the following commands on switchA:
What is the result of executing the given commands? (Choose two.)
Answer: B,C
Explanation:
A default list is used for the RADIUS server for authentication and the key for the RADIUS server is firstKey111. A RADIUS server combines the authentication and authorization processes. Before you configure the RADIUS server, you should enable AAA by using the aaa new-model command in the global configuration mode. Then, you can specify the location of the RADIUS server and the key using the radius-server host command. In this case, the RADIUS server is located at the IP address 192.168.105.67 and requires the key firstKey111 as the encryption key. This key must be mutually agreed upon by the server and the clients.
The aaa authentication dot1x default group radius command creates a method list for 802.1X authentication.
The default group radius keywords specify that the default method will be to use all listed RADIUS servers to authenticate clients. Since only one is listed, it will be the only one used.
It is incorrect to state that 802.1X authentication is enabled on the Fa0/1 interface only. The interface range Fa
0/1 - 11 and the dot1x port-control auto commands specify that 802.1X authentication is enabled on the interfaces Fa0/1 to Fa0/11.
It is incorrect to stat that AAA is not enabled on the switch. The aaa new-model command enables AAA globally on the switch.
Objective:
Infrastructure Security
Sub-Objective:
Describe device security using Cisco IOS AAA with TACACS+ and RADIUS
References:
Catalyst 4500 Series Switch Cisco IOS Software Configuration Guide, 12.2(31)SG > Configuring 802.1X Port- Based Authentication Cisco IOS LAN Switching Command Reference (PDF)
NEW QUESTION # 320
An engineer is working with NETCONF and Cisco NX-OS based devices. The engineer needs a YANG model that supports a specific feature relevant only to Cisco NX-OS. Which model must the engineer choose?
Answer: A
Explanation:
https://github.com/YangModels/yang/tree/master/vendor/cisco
https://blogs.cisco.com/developer/which-yang-model-to-use
NEW QUESTION # 321
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