VPN Glossary for Beginners: Subscriptions, Nodes, Protocols, Routing

Most options in a client are English abbreviations, and the first time you open one it's easy to feel lost. This article walks through the common terms in the order you'll meet them: subscriptions first, then nodes and route types, then protocols, and finally routing and modes. Each term comes with a scenario so you can match it to your own setup.

Subscriptions and Nodes

Subscription link

An address that points to a configuration file; when the client visits it, it receives the full node list and rules. You don't have to enter every server by hand — when you switch devices, just copy this link across. Scenario: setting up a new phone, paste the subscription link into the client and the node list is back within seconds.

A subscription link is the same as account credentials. Posting it publicly hands your quota to someone else — this is where beginners trip up most often.

Node

A node is a server you can connect to, usually named after its region, such as "Singapore 01" or "Japan 03". The first rule for choosing a node is to pick by where your target content is located, not by which name sounds nicer.

Route types: IEPL dedicated / relay / direct

Nodes in the same region may sit on completely different underlying links. VPNNK labels its nodes with three types:

Type	Link characteristics	Best for
IEPL dedicated	Dedicated link, no contention with other traffic for public egress	4K films, long video meetings
Relay	Exits via a relay node over an optimized path	Secondary regions, moderate stability needs
Direct	Connects straight to the exit node, shortest path	Quick access, looking things up

How to choose: filter candidates by region first, then prefer IEPL dedicated lines among them; if a region has no dedicated line, relay is the next best option.

Protocols

The protocol determines how the client and the node communicate. You don't need to study the details for everyday use — knowing they exist and roughly how they differ is enough:

Shadowsocks: lightweight and widely compatible, supported by virtually every client.
VLESS: a newer protocol with low handshake overhead, used together with a transport layer.
Hysteria2: built on QUIC, it holds up better on links with heavy jitter.

Scenario: if a node keeps disconnecting on your network, switching to a node that uses a different protocol is often more effective than reconnecting again and again.

Routing and Rules

Routing rules

Routing is a list that decides which traffic goes through the proxy and which goes direct. Sites in mainland China load faster and use less data when they connect directly, while sites outside China go through the proxy. Scenario: with the client running, visiting a shopping site in mainland China over the proxy makes the page slower and wastes data — routing rules exist to prevent exactly that.

Global mode

All traffic goes through the proxy with no distinction. Useful for troubleshooting: when you're not sure whether an app is going through the proxy, switching to global mode shows you at a glance. The trade-off is noticeably higher data use, and local services slow down as well.

Rule mode

Decided automatically by the routing list — the default choice for everyday use. Scenario: during a workday on rule mode, meeting apps and documents go through the proxy while local services connect directly, so neither side is held up.

3 Route types: IEPL dedicated / relay / direct

2 Common modes: global mode and rule mode

5 Supported platforms: Windows / macOS / iOS / Android / Linux

Three easily confused pairs

✅ A node is a location, the route type is link quality: two nodes both in Singapore can differ hugely in stability between a dedicated line and a direct connection.
✅ A subscription is the credential, the configuration file is the content: the config the subscription link points to can be updated at any time.
❌ Global mode doesn't mean faster: it simply sends all traffic out, and is usually slower and uses more data.
❌ Newer protocols aren't automatically better: new versus old only affects performance on certain links, and compatibility matters just as much.

Bottom line: beginners only need to remember three things — don't share your subscription link, choose nodes by region first and route type second, and stay in rule mode day to day. Look up the other terms when a specific problem comes up.

FAQ

How often does the node list update?

The subscription pulls the latest list automatically; just refresh it once manually in the client to see newly added or adjusted nodes.

A region has several nodes — which one should I choose?

Prefer the ones labeled IEPL dedicated, then relay. If neither is stable, switch to another node in the same region.

How is data usage counted?

It's counted by the actual amount of data transferred. Monthly plan quotas reset each month on your activation date, while data packs last until they run out and never expire.