Network Technician

1. 01The Cord That Was Already ThereWork order NET-2026-0001 · Seeland's second uplink, and the free port that goes somewhere else12 min
2. 02Both Ends Have to AgreeWork order NET-2026-0002 · a 10G link with two ends, and only one of them is yours12 min
3. 03What the Port Has Been Trying to Tell YouWork order NET-2026-0003 · Nordwind's uplink drops all day, and the counters have been keeping score since March13 min
4. 04Two Uplinks, One Convenient PanelWork order NET-2026-0004 · a switch commissioned on the bench, and a second uplink that is awkward tonight12 min
5. 05The VLAN That Goes NowhereWork order NET-2026-0005 · Helvetia's new port lights, sits in the right network, and that network stops at the switch13 min
6. 06A Test That Could Not Have FailedWork order NET-2026-0005 · the change went in at 02:40, your check passes, and nobody has asked what a failure would have looked like13 min
7. 07Port Nine Belongs to Somebody ElseChange CHG-2026-0201 · the request names port 9, the customer agreed, and the switch says the far end is a different customer entirely12 min
8. 08The Step That Cannot Be UndoneChange CHG-2026-0210 · one cord, one hour, and the line near the bottom of the plan that ends the way back11 min
9. 09Nobody Is CountingWork order NET-2026-0009 · slow after four, seventeen gigabits promised across a ten-gigabit link, and a ten-minute fix that somebody else pays for11 min
10. 10Monday, and Everything at OnceWork order NET-2026-0014 · a host that goes and comes back, a counter with a date beside it, and a handover line that must not sound finished17 min
11. 11The Room Where You Have to Say ItNo work order · five questions from somebody who has done the job, a whiteboard, and one from somebody who has not14 min

What you train

• A panel port is an address, not a socket
• Reading a house cabling record before you patch
• Whose side of the panel is whose
• Transceivers: both ends have to agree
• Rate and media mismatches, and what they cost
• Administrative state vs operational state
• Interface counters and what a baseline is for
• CRC errors vs link transitions, and the field that means each
• Commissioning a switch: identity, management, uplinks
• Why a redundant pair has to end somewhere separate
• A VLAN configured on a switch, and an uplink that does not carry it
• Proving where a network stops
• Asking whether a test could have come back negative
• Neighbour reports and learned addresses against a port map
• A record copied from a plan, never walked
• Change windows: preparation, back-out reserve, decision point
• The step that cannot be undone, and keeping the way back
• Contracted capacity behind a shared uplink
• Who pays when a fault is moved instead of fixed
• Triage when three things arrive at once
• A handover line the next shift can act on
• Network interview questions & whiteboard recall

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Pricing

Missions 1 and 2 and the interview trainer are free. Fewer than 3 missions passed: 14 days money back, no questions asked.

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