Lab na-09 - PortFast and BPDU Guard
Spanning Tree's convergence is fast on RSTP - but it is not instant. When you bring up an access
Labs
Hands-on Cisco IOS XE lab walkthroughs. Each lab ships with a real CML topology, configs you can paste, and verified show output. Articles tagged Labs cover the full CCNA 200-301 blueprint across Network Fundamentals, Network Access, IP Connectivity, IP Services, and Security Fundamentals.
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Lab na-12 - Router-on-a-Stick Inter-VLAN Routing
Router-on-a-stick is the classic technique for routing between VLANs using a router with only one physical interface
Lab na-11 - CDP vs LLDP
CDP (Cisco Discovery Protocol) and LLDP (Link Layer Discovery Protocol) are two ways for network devices to tell each other
Lab na-05 - Voice VLAN on Access Ports
An access port normally carries a single VLAN of untagged traffic. There is one important exception: a port connected to
Lab na-08 - Configure Rapid-PVST
Spanning-Tree Protocol prevents Layer 2 loops by detecting redundant paths and putting one in a blocking state. Rapid-PVST
Lab na-07 - PAgP vs LACP
EtherChannel can be negotiated by two different protocols: Cisco's proprietary PAgP (Port Aggregation Protocol) or the IEEE standard
Lab na-06 - LACP Active EtherChannel
EtherChannel takes multiple physical links between two switches and bundles them into a single logical link with the combined bandwidth.
Lab nf-12 - OSI vs TCP/IP in the Cisco IOS CLI
Every CCNA candidate memorizes the OSI seven-layer model and the four-layer TCP/IP model. The exam tests both.
Lab na-04 - DTP and Static Trunking
DTP - the Dynamic Trunking Protocol - is Cisco's way of having two switches automatically agree to form a trunk.
Lab na-02 - VLANs and Access Ports
A VLAN is a logical broadcast domain that lives on top of a physical switch. The switch can have a
Lab na-01 - Switching Fundamentals and the CAM Table
Layer 2 switching boils down to one mechanism: the CAM table (Content-Addressable Memory), also called the MAC address table.
Lab nf-08 - Configure IPv6 Static Routes
IPv6 static routes look almost identical to IPv4 static routes. There is one wrinkle worth knowing: when you use a