Hello,I've got a question about STP/RSTP (it applies to both, but I'll just say STP). If I connect several switches and the STP algorithm eventually creates a loop-free environment, then how can a single new switch cause a loop?Let's look at an examp...

Hello, Can someone please help me with these subnetting problems? 1) Suppose you have the network 172.16.0.0/16. How many subnets do you get if you subnet it to a /23? I'd say you get 2^7=128, because 23-16=7. This calculator agrees with me, and it l...

Hello, I'd like to know how an ARP request between hosts that are physically located in two branch offices (so separated by a WAN link) but belong to the same VLAN gets delivered. Topology:Host A -> Switch A -> Router A -> ISP -> Router B -> Switch B...