Put two computers in different VLANs on the same switch and they cannot reach each other. That is…
Static routes work fine until you have more than a few of them. Single-area OSPF is where most…
Every router running OSPF builds an identical map of the network and then works out its own best…
IPv6 static routes look like their IPv4 cousins until you hit the parts that are genuinely different, and…
When the primary link drops, a backup route has to take over, and on a Cisco router that…
A packet arrives on one interface and leaves on another, and everything a router does happens in the…
Read the Cisco IP routing table with show ip route: route codes, administrative distance vs metric, longest-prefix match,…
Test your CCNA 200-301 Domain 2 (Network Access) knowledge: VLANs, trunking, CDP/LLDP, spanning tree, EtherChannel, and wireless, with…
Understand Cisco wireless architectures and AP modes: autonomous vs controller-based, split-MAC and CAPWAP, FlexConnect, and the lightweight AP…
Configure EtherChannel on Cisco switches with LACP: bundle two links into one Port-channel, verify with show etherchannel summary,…
Configure Spanning Tree (Rapid PVST+) on Cisco switches: elect the root bridge, read port roles and states, and…
Configure and read CDP and LLDP on Cisco switches: see what is on each port, run show cdp…
