Lab ipc-08 - OSPF MD5 / SHA Authentication
By default, OSPF neighbors will form an adjacency with anyone speaking the protocol on the same segment. In a production
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 ipc-11 - EIGRP Feasible Successor and DUAL
EIGRP's signature feature is sub-second convergence on common failure modes. The secret: DUAL (Diffusing Update Algorithm) precomputes
Lab ipc-10 - EIGRP Named-Mode AS 100
EIGRP (Enhanced Interior Gateway Routing Protocol) is Cisco's dynamic routing protocol. It uses the DUAL algorithm (Diffusing Update
Lab ipc-05 - OSPF Multi-Area (ABR + Type 3 LSAs)
Multi-area OSPF divides a network into smaller logical zones connected through Area 0 (the backbone). Each non-backbone area
Lab ipc-03 - RIPv2 Essentials
RIP (Routing Information Protocol) is the dynamic routing protocol every textbook teaches first because it is the simplest. Distance-vector,
Lab ipc-07 - OSPF DR/BDR Election
On a broadcast OSPF segment, the protocol elects a Designated Router (DR) and a Backup DR (BDR). Other routers form
Lab ipc-06 - OSPF Network Types
OSPF operates differently on different link types. On Ethernet (broadcast), it elects a DR/BDR. On a point-to-point
Lab na-14 - Wireless Architecture Overview (Concept Lab)
The CCNA exam requires a working understanding of wireless network architecture without a hands-on Wi-Fi lab requirement. The
Lab na-13 - SVI on L3 Switch (Inter-VLAN Routing)
An SVI (Switched Virtual Interface) is a virtual L3 interface inside a switch, associated with a VLAN. When the switch
Lab ipc-02 - Floating Static Routes (AD Manipulation)
A floating static route is a second static route to the same destination with a deliberately higher administrative distance. It
Lab ipc-01 - Default Static Route + Floating Backup
A default route - the famous ip route 0.0.0.0 0.0.0.0 next-hop - tells a router
Lab na-10 - Root Guard
Root Guard is the third spanning-tree hardening feature, after PortFast and BPDU Guard. It protects an interface from EVER