1. Network Security beginner

    A security questionnaire asks whether data is encrypted in transit and the team answers yes because the load balancer serves TLS 1.3. What happens if an attacker gets code execution on one host behind that load balancer, and what has the TLS answer actually bought?

    2 min answer tlsterminationmtlslateral-movement
  2. Network Security advanced

    All outbound traffic from a cluster passes through an egress proxy that enforces allowlists and TLS inspection. The proxy does not fail; it gets slow, with p99 rising from 20 ms to 6 s. What happens across the platform over the next ten minutes?

    3 min answer egressproxythread exhaustiontimeouts
  3. Network Security intermediate

    An enterprise wants to segment its network so that a compromised application server cannot reach the database directly. What does segmentation actually buy, and what commonly undermines it?

    2 min answer network-securitysegmentationlateral-movementdefence-in-depth
  4. Network Security intermediate

    Review this design. 12 services and 8 engineers in one cloud region. The proposal adds a service mesh with mutual TLS between every pair of services plus per-service microsegmentation policy plus an external policy decision point consulted on every internal call plus envelope encryption with one data key per record. What would you remove?

    3 min answer over-engineeringservice-meshpolicy-decision-pointenvelope-encryption
  5. Network Security advanced

    You propose egress filtering. Engineering says it will break builds and slow delivery. How do you proceed?

    2 min answer network-securityexfiltrationadoption