A REST API is a web interface that uses HTTP verbs (GET, POST, PUT, DELETE) to perform CRUD operations on resources, commonly exchanging JSON data. CCNA's automation domain expects you to recognise REST characteristics, authentication types, and JSON structure.
OSPF (Open Shortest Path First) is a link-state interior gateway routing protocol that builds a topology map and computes shortest paths by cost.
A VLAN (Virtual Local Area Network) is a logical segmentation of a switched network that groups ports independently of physical location.
Trunking is the practice of carrying traffic for multiple VLANs over a single switch link using 802.
The Spanning Tree Protocol (STP) is a Layer 2 protocol that prevents switching loops by electing a root bridge and blocking redundant paths.
EtherChannel is a technology that bundles several physical switch links into one logical link for greater bandwidth and redundancy.
Subnetting is the practice of dividing an IPv4 network into smaller subnetworks using a subnet mask or CIDR prefix.
Private IPv4 addressing is the use of the RFC 1918 ranges (10.
NAT (Network Address Translation) is a technique that maps private IP addresses to public addresses at a router boundary.
A First Hop Redundancy Protocol (FHRP) is a protocol that lets multiple routers share a virtual gateway address so hosts keep connectivity if one router fails.
An access control list (ACL) is an ordered set of permit and deny rules a router or switch uses to filter traffic.
AAA (authentication, authorization, and accounting) is a security framework that verifies identity, controls what a user may do, and records activity.
A REST API is a web interface that uses HTTP verbs (GET, POST, PUT, DELETE) to perform CRUD operations on resources, commonly exchanging JSON data.
JSON (JavaScript Object Notation) is a lightweight, human-readable data format that represents data as key-value pairs, arrays, and nested objects.