How to build reliable network infrastructure for your office

The network is the backbone of every modern workplace. Slow internet, unstable Wi-Fi, computers that can't "see" the printer — all of these are symptoms of a poorly planned or outdated network infrastructure.

The good news: even for a small office with 5-15 employees, building a reliable network isn't rocket science — as long as you know what you're doing. This article is a practical guide.

Step 1: Assess your needs

Before you buy any equipment, answer the following questions:

• How many devices will be connected (computers, phones, printers, cameras)?
• Do you need Wi-Fi, and in which areas?
• Do you have specific needs — VPN, VoIP telephony, video surveillance?
• What internet speed do you have, and do you plan to increase it?
• Will employees work remotely?

Your answers determine what equipment you actually need.

Step 2: Choose the right router

The router is the central element of the network. For a small office we recommend:

For 5-10 users: A business router (MikroTik, Asus Business, TP-Link Omada) with VLAN and VPN support. Don't use cheap home routers in an office environment — they aren't built for constant load.

For 10-20 users: A firewall/router solution (pfSense, Fortinet) with better manageability and security.

Key features to look for:

• VLAN support (splitting the network into segments)
• VPN support
• Firewall functionality
• Quality of Service (QoS) for prioritizing traffic

Step 3: Structured cabling

A wireless network is convenient, but a wired one is more reliable and faster. For devices that need a stable connection — workstations, servers, printers — we recommend a wired connection.

Cabling recommendations:

• Use Cat6 cables (support up to 10 Gbps)
• Install network outlets at every workstation
• Organize cables in cable trays — don't leave them lying on the floor
• Route everything into a central patch panel mounted in a cabinet or rack

Step 4: Wi-Fi coverage

For an office with more than 2-3 rooms, a single router is almost certainly not enough. You'll need additional access points.

Recommended solutions:

• TP-Link Omada or Ubiquiti UniFi — centralized management of multiple access points
• Mount access points on the ceiling, not on desks or walls
• Set up a single roaming network for seamless movement between access points

Important: Split your Wi-Fi network into a staff network and a guest network — guests should not have access to internal resources.

Step 5: Network segmentation (VLAN)

Splitting the network into segments is one of the most important measures for security and performance:

• Workstations — the main network
• Servers and NAS — an isolated segment with controlled access
• IoT devices (cameras, printers, smart devices) — a separate segment
• Guest Wi-Fi — internet access only, no access to internal resources

If an IoT device gets compromised, VLANs limit the damage to just its own segment.

Step 6: Network security

Your network infrastructure needs to be protected:

• Firewall — filters incoming and outgoing traffic
• Strong passwords for Wi-Fi and admin interfaces
• Regular updates to the firmware of all network devices
• VPN for employees' remote access
• Monitoring — logging network activity for early detection of problems

Step 7: Backup internet line

For a small business, a 4G/5G backup line can save the day if your main provider fails. Many business routers support dual-WAN (two internet lines with automatic failover).

How much time and money does it take to build?

At SNM Support:

• Small office (up to 5 employees): about 3 working days
• Office with 5-15 employees: about 10 working days

Prices depend on size, requirements, and the equipment chosen. We offer a site visit and a free quote.

A well-built network infrastructure means fewer disruptions, better security, and more productive employees. Get in touch with SNM Support for an assessment of your current network or to build one from scratch.