Network engineering, interview-ready
Question banks and reference notes for trading-infrastructure roles — multicast market data, low-latency networking, exchange connectivity and routing — projected from a personal knowledge base of own-words notes with sources. Every answer keeps its verification marks; nothing is published that isn't ours to publish.
88 questions · 18 reference notes ·search everything →
Topics
Multicast & market data
IGMP, snooping and queriers, PIM-SM, A/B feed arbitration, public incident postmortems and exchange feed handling.
Low-latency networking
Design principles from Sterbenz & Touch applied to trading networks: delay budgets, cut-through, kernel bypass, polling, open-loop recovery.
SGX & HKEX connectivity
Colocation, market data feeds, recovery services and the 2027 platform migrations in Singapore and Hong Kong.
EIGRP
Advanced distance-vector routing: DUAL, feasible successors, stub routing and query scope, metrics, adjacency troubleshooting.
Fundamentalscoming
Ethernet, ARP, VLAN/STP, IP, TCP/UDP — and the routing protocols OSPF and BGP.
Linux host networkingcoming
ip, ss, tcpdump, ethtool, sysctl, socket buffers, drop counters, IRQ/NUMA, kernel bypass.
Time sync & capturecoming
PTP (IEEE 1588), linuxptp, hardware vs software timestamps, pcap analysis.
Python for network engineerscoming
Sockets, pcap parsing, config tooling, the unaided-scripting bar interviews expect.
Design interviewscoming
Colocation network design walkthroughs: market data, order entry, time, capture, management.
The explain-it-out-loud list
A topic is done when it can be explained out loud in English, end to end.
- ☐ A packet's walk end to end — Fundamentals
- ☑ A multicast join from receiver to source — Multicast & market data
- ☑ A/B arbitration — Multicast & market data
- ☑ Why cut-through — Low-latency networking
- ☑ What a microburst is and how you would find one — Multicast & market data
- ☐ PTP basics — Time sync & capture
- ☑ SGX's 2027 migration — SGX & HKEX connectivity
Knowledge base last projected into this site:2026-10-03 · how the content is sourced and verified: About