The correct answer is D. print(json_object[ " TABLE_intf " ][ " ROW_intf " ][0] [ " prefix " ]).
* Parsing JSON output from Cisco devices
* Using Python to extract structured data
* Understanding how CLI output is converted into JSON format
* The command used:
show ip int brief | json
returns structured JSON data.
* The JSON hierarchy shown in the exhibit:
{
" TABLE_intf " : {
" ROW_intf " : [
{ " intf-name " : " Vlan100 " , " prefix " : " 192.168.10.1 " , ... },
{ " intf-name " : " Vlan200 " , " prefix " : " 192.168.20.1 " , ... },
...
]
}
}
* Important Observations:
* ROW_intf is a list (array) of interface objects.
* Each object contains fields like " prefix " (IP address).
* VLAN 100 is used for management and appears first in the list.
* Python Code Analysis:
* json.loads() converts JSON string into a Python dictionary # json_object
* To access VLAN100 IP:
json_object[ " TABLE_intf " ][ " ROW_intf " ][0] [ " prefix " ]
* Why Option D is Correct:
* Uses the correct variable ( json_object )
* Correctly navigates dictionary # list # element # key
* Index [0] corresponds to Vlan100 (management VLAN)
* A & B: Use json.dumps incorrectly (this function converts Python # JSON, not for accessing data)
* C: Uses index [1] , which refers to Vlan200, not VLAN100
When working with Cisco JSON output:
* Identify list vs dictionary
* Use indexing for lists ( [0] )
* Use keys for dictionaries ( [ " key " ] )
Correct Pattern:
json_object[ " parent " ][ " child " ][index] [ " field " ]

The correct answer is A. client.
In Cisco 802.1X / network admission control terminology, the supplicant is the endpoint device or client software requesting access to the network. Cisco documentation describes 802.1X as a client-server access control model in which the client must be authenticated before gaining ac cess, and the network device relays authentication messages between the supplicant and the authentication server.
* Client = Supplicant
* SW1 = Authenticator
* RADIUS server = Authentication server
* R1 = transit/network infrastructure device, not the supplicant
The supplicant is the device that is trying to join the network and provide credentials. In the diagram, that is the client. Cisco also defines the three 802.1X entities as supplicant system, authentication system, and authentication server system, with the supplicant being the endpoint such as a PC.
* B. SW1 SW1 functions as the authenticator, controlling access to the network port and relaying EAP messages.
* C. RADIUS server The RADIUS server is the authentication server, not the supplicant.
* D. R1 R1 is part of the network path in the figure, but it is not the device requesting admission to the network.
ENCOR exam point:
For 802.1X / NAC questions, remember this trio:
* Supplicant = endpoint/client
* Authenticator = switch or AP controlling access
* Authentication server = RADIUS / Cisco ISE

The correct answer is B. to connect wired endpoints to the SD-Access fabric.
In Cisco SD-Access, the fabric edge node is the device that provides access for endpoints into the fabric. It is the point where user devices such as PCs, phones, printers, and access points attach to the SD-Access network. The edge node handles endpoint onboarding into the fabric and applies the appropriate segmentation and policy.
A fabric edge node is specifically responsible for:
* Connecting wired endpoints to the fabric
* Serving as the access-layer entry point into the SD-Access fabric
* Enforcing policy and segmentation for connected endpoints
* Extending the fabric to end hosts
This is the main role of the edge node in the SD-Access architecture.
* A. to connect the fusion router to the SD-Access fabric This is not the role of the fabric edge node. The fusion router is used outside the fabric to provide connectivity between the fabric and external networks.
* C. to advertise fabric IP address space to external networks This function is associated with the border node, not the edge node. The border node connects the fabric to external domains and exchanges reachability information.
* D. to connect external Layer 3 networks to the SD-Access fabric This is also the function of the border node, not the edge node.
Remember these SD-Access node roles clearly:
* Edge node = connects endpoints
* Border node = connects to external networks
* Control-plane node = maintains endpoint-to-location mappings
* Fusion router = external routing/services outside the fabric
Edge node = endpoint access into the fabric