46Where does multicast show up in real ops work, and why does it break the moment you move to the cloud?▼easyNewGoldman SachsJPMorgan ChaseTCS◆ premiumVRRP heartbeats, market data feeds, mDNS noise and cluster chatter all ride multicast, and all of it assumes a switched LAN. Why clouds drop it and what replaces it.Open full answer →
39After a VLAN migration, a VIP answers from some subnets and times out from others. Someone shouts duplicate IP. Prove it.▼hardNewWalmart Global TechTCSAccenture◆ premiumDuplicate-IP claims need evidence, and one command provides it. Then the real skill: telling a genuine two-owner clash apart from ARP flux, because the fixes could not be more different.Open full answer →
