STEM · Full roadmap · ~115 min read · 39 steps

🌐IT Support Level 3: Network and Server Support (Aotearoa NZ)

Diagnose networks, subnet by hand, and support servers in the Aotearoa NZ context

Activities in this path

Try thisQuick checkThink it throughFill the blankPut in orderTap to revealYour turn

Learning path

0 / 39 steps

Start here

What changes at level 3

The OSI model as a map

Layers you will actually touch

TCP/IP model and encapsulation

IPv4 addresses and what they mean

CIDR notation and the slash

Subnetting: the host count

Subnetting: finding the ranges

Private ranges and NAT

A short word on IPv6

DNS, the name to number system

DHCP, automatic addressing

Common ports and protocols

Switching: MAC tables and VLANs

Trunking and spanning tree

Routing: moving between networks

Dynamic routing and where OSPF and BGP live

Network hardware in the rack

NZ fibre, the UFB network and the ONT

NZ ISPs, peering and the subsea cables

Wireless: bands, channels, and interference

Enterprise wireless and 802.1X

Troubleshooting methodology

The diagnostic toolkit

Firewalls and basic network security

Server roles and operating systems

RAID levels explained

Virtualisation and hypervisors

Active Directory and FSMO roles

Group policy and managing the fleet

Monitoring and alerting

Backup and disaster recovery

Cloud in NZ and data sovereignty

Why NZ data often has to stay onshore

NZ security agencies, NZISM and the Privacy Act

NZ employers, certs and the pathway

Common mistakes and a practice routine

Where to go next

Your current step uses a Rive animation; completed steps show a check.