IT Support, Networking and Infrastructure
IT support and the service desk
The service desk is where most people enter IT, and where the rest of an organisation forms its opinion of the IT department. The work is part diagnosis, part conversation and part record-keeping, because a fix nobody wrote down helps one person once. This page covers what support involves, how A+ and Google's programme describe it, and why the strongest technicians are seldom the ones who know the most.
Why this topic exists: Tickets, incidents, requests, remote support and the operational procedures of A+ Core 2 (21 %): the job most people enter IT through (Google IT Support; ITIL's service desk and incident practices).
A service desk analyst takes whatever arrives, by phone, chat, email or portal, and turns it into a ticket that can be followed to an end. Some tickets are incidents: something that worked has stopped, and the aim is to get the person working again. Others are requests: a new starter needs a laptop and accounts, a manager wants access to a shared folder, a password has expired. Behind both sit a knowledge base, which is the organisation's memory of what has been solved before, and a set of priorities that decide whether the printer on the third floor waits for the payroll server.
Tiers, and what each one owns
Most desks divide the work into tiers so that the easy majority is solved quickly and the hard minority reaches someone with the time and the rights to handle it. The labels vary between employers; the logic behind them rarely does.
| Tier | Typical work | What sends a ticket onward |
|---|---|---|
| First line | Logging, resets, known fixes from the knowledge base, remote sessions | No documented fix, or rights the analyst does not hold |
| Second line | Desktop and account faults that need investigation, software deployment, hardware swaps | A fault in a server, network or application the team does not own |
| Third line | Systems, network and application specialists | A defect only the vendor can correct |
| Desk lead | Queue health, escalations, the service level the desk has promised | A pattern of repeat tickets that needs problem management |
Remote tools have changed first-line work more than any other single technology. Most fixes now happen in a shared session on the user's own screen, which makes the analyst's manner as visible as their skill and makes consent part of the routine: ask before taking control, say what you are doing, and end the session when you finish. The same tools are a favourite of fraudsters posing as support staff, one more reason the desk's own procedures need to be predictable enough that users notice when something is off.
How the exams describe the job
CompTIA's A+ turns up in more support job listings than any other certificate, and its second paper ends with operational procedures: documentation and ticketing, handling changes, safe work with equipment, and communicating with users. Google's IT Support certificate began as Google's way of staffing its own support desks, and it sets customer service beside networking, operating systems, administration and security, naming A+ as the exam to pair with it. ITIL Foundation supplies the vocabulary the desk's managers use. None of them says much about the hardest part, which is staying accurate and courteous while the queue keeps growing. Three habits mark the analysts who move on quickly:
- Write the ticket for the next person. Symptoms, what you tried, what changed. A ticket closed with the single word 'fixed' teaches the knowledge base nothing.
- Restore first, investigate afterwards. The user needs to work; the cause can be chased once they do, and a cause that keeps returning belongs to problem management.
- **Treat reports of phishing as urgent.** The desk often hears first that a convincing message is circulating, and a fast escalation to security matters more than any single password reset.
The desk is a starting point, not a ceiling. Analysts who enjoy the machines move into operating systems and server administration, those drawn to the network head for Network+, and those who find they care more about the process than the laptop grow into IT service management.
Next to this topic
- IT fundamentalsWhat computers, networks, operating systems and data are for, before fixing any of them: the scope of Tech+ and of the first weeks of every support course (SFIA Delivery and operation; A+ Core 1).
- Hardware, mobile devices and troubleshootingComponents, peripherals, mobile devices and the troubleshooting method are the largest part of A+ Core 1 (Hardware 25 %, Hardware and Network Troubleshooting 28 %, Mobile Devices 13 %, read 2026-09-26).
- Operating systems: Windows, macOS, LinuxInstalling, configuring and securing desktop operating systems is A+ Core 2's largest domain (Operating Systems 28 %) and the daily ground of support work.
- Linux administrationThe command line, package management, filesystems, users, services, scripting and networking as LPIC-1 objectives v5.0 lay them out (topics 101–110); Linux+ and RHCSA test the same ground.
- Windows Server and Active DirectoryDomains, group policy, file and print, identity for the desktop estate: the server side of most business IT (SFIA System software administration; Microsoft's Windows Server hybrid administrator track).
- Networking fundamentalsThe OSI and TCP/IP models, addressing, subnetting, DHCP and DNS are the first domains of Network+ (Networking concepts 23 %) and CCNA (Network Fundamentals 20 %).
- IT service management (ITIL)The practices that run IT as a service: incident, problem, change enablement, service level, continual improvement (ITIL's practice model, Version 5 since February 2026 with ITIL 4 in parallel; ITIL Foundation; ServiceNow CSA).
- Virtualisation and server infrastructureHypervisors, virtual machines and server hardware sit between the desktop and the cloud (A+ Core 1 Virtualization and Cloud Computing 11 %; SFIA Infrastructure operations; VMware and Server+).
- Scripting and automation for administratorsPowerShell, Bash and Python are how administrators stop doing the same thing twice (LPIC-1 topic 105; CCNA Automation and Programmability 10 %; SFIA System software administration).
Concepts to know
Glossary entries with the reason each one matters here.
- Incident Management
The practice a service desk runs on.
- Phishing
The commonest user report a desk receives.
- MFA
The commonest reset request a desk handles.
Certifications that test it
Vendor exams and free certificates; facts, cost and the preparation path are on each page, and the certifications hub has them all.
- CompTIA · 220-1201 + 220-1202CompTIA A+Operational procedures are a Core 2 domain.
- Google · Course completionGoogle IT Support Professional CertificateGoogle's programme prepares for exactly this job.
- PeopleCert · ITIL Foundation V5ITIL Foundation (Version 5)The service desk practice's vocabulary.
- CompTIA · FC0-U71CompTIA Tech+The pre-entry step.
Guides that apply
- Migrating a site without downtime
The runbook discipline of a support team applied to a website move.
Tools of the trade
- ServiceNow
The ticketing platform many desks run on.
Frequently asked
- Can I get a service desk job without a certificate?
- Often, yes, particularly through apprenticeships, internal moves or small firms. A certificate mainly helps you past automated screening where hundreds apply. Evidence that you can explain a technical fix clearly to a non-technical person matters to a desk manager at least as much.
- Should I take A+ or the Google IT Support certificate?
- They answer different needs. Google's programme is a structured course for someone starting from nothing; A+ is an exam that employers recognise by name. Many people use the first to learn and the second to prove it, which is the pairing Google itself suggests.
- How technical is first-line support really?
- Less than the exams suggest on most days and more on some. The bulk is accounts, access, printers and known fixes, handled well through clear notes and patience. The technical depth shows when a ticket does not match anything seen before, and the analysts who can reason through those are the ones promoted.
Courses in the directory
19 courses are filed here; the top 6 by our ranking, details and the provider link on each course page.
Last reviewed 26 September 2026 · Getting Digital
