CCIE

You are troubleshooting a problem that only the packets can explain - a malformed handshake, an unexpected retransmission, a mystery drop.

SNMPv1 and v2c send everything - including your community string, which is effectively a password - in cleartext across the network. Anyone

Most people configure an IOS DHCP server once, with three lines - network, default-router, dns-server - and never touch it

Two customers connect to your router. Both, entirely by coincidence, use 10.5.5.0/24 internally. Both have a

A dual-router branch has an obvious problem: you have two WAN Edge routers for redundancy, but you may only

For years, branch internet traffic took a ridiculous journey: from the branch, across the WAN, to a central data centre,