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CCNA is the associate level of certification system in Cisco. CCNA certifications expire in 3 years. As it is valid for three years, you should take recertification exam, you should choose any one of following ways:
pass any one associate exam like 200-301 CCNA exam, Cisco certified DevNet exam;
pass one technology core exam;
pass any one expert-level written exam;
pass any one expert-level Lab/Practical exam
Cisco Secure Client—the next-generation evolution of Cisco AnyConnect Secure Mobility Client—is widely deployed on enterprise and academic endpoints to provide virtual private network (VPN) connectivity, DNS layer security, and endpoint telemetry. However, when you leave an organization, decommission a device, or migrate to a different network architecture, removing the client becomes necessary. Because Cisco Secure... » read more
On a Cisco router running Cisco IOS or Cisco IOS XE, the primary command used to display the active routing table is show ip route. This command queries the router’s Routing Information Base (RIB) and prints every directly connected network, static route, and dynamically learned path currently active in the control plane. Whether validating connectivity... » read more
Managing campus access networks switch by switch introduces operational friction, configuration drift, and spanning-tree vulnerabilities. Cisco StackWise solves these challenges by binding multiple physical switches into a single logical entity through dedicated, high-speed stacking backplanes. For network architects and system administrators evaluating the technology, understanding the core advantages of this clustering mechanism is the first... » read more
The migration of enterprise workloads to multi-cloud environments, paired with the permanence of hybrid work, has dismantled the traditional castle-and-moat security perimeter. In legacy enterprise networks, branch and remote worker traffic was backhauled over dedicated Multiprotocol Label Switching (MPLS) links to centralized data centers for security scrubbing before reaching external web and SaaS applications. This... » read more
When a Cisco router powers on, network engineers expect to see familiar interface status logs and a standard hostname prompt. However, when hardware fails to find a valid operating system, when a configuration register is misconfigured, or when an administrator intentionally sends a break signal, the console drops into a stripped-down command line: rommon 1... » read more
Modern enterprise networks operate across a boundaryless landscape where workloads reside across multi-cloud environments, users connect from anywhere, and branch offices communicate directly over the public internet. In this environment, the traditional perimeter firewall model has eroded. A router can no longer function merely as an uninspected packet-forwarding engine; it must act as an intelligent,... » read more
Modern enterprise networks have evolved far beyond the era when network engineers could manage campus infrastructure through individual command-line interface (CLI) sessions. Sprawling local area networks (LANs), thousands of remote access points, strict zero trust mandates, and hybrid work requirements demand centralized management, predictive troubleshooting, and policy-driven automation. Cisco Catalyst Center—formerly known as Cisco DNA... » read more
On any Cisco Catalyst or Nexus switch straight out of the box, the default VLAN is VLAN 1. From the moment you apply power to a factory-fresh switch, all physical Ethernet interfaces are active, unconfigured, and assigned as untagged access ports to this default broadcast domain. While VLAN 1 makes initial setup plug-and-play—allowing devices connected... » read more
Modern enterprise IT environments have reached a level of scale and architectural fragmentation that pushes traditional management tools to their limits. A routine service disruption—such as an intermittent application slowdown or degraded voice call—rarely confines itself to a single domain. Network engineers inspect switch fabrics and wireless access points in Cisco Catalyst Center or the... » read more