// RFC 1918 (IPv4 addresses) and RFC 4193 (IPv6 addresses).
func (ip IP) IsPrivate() bool {
	if ip4 := ip.To4(); ip4 != nil {
		// Following RFC 1918, Section 3. Private Address Space which says:
		//   The Internet Assigned Numbers Authority (IANA) has reserved the
		//   following three blocks of the IP address space for private internets:
		//     10.0.0.0        -   10.255.255.255  (10/8 prefix)

#   2) Verifying that no system pods are attempting to run on Windows nodes.
#   3) Verifying pairwise connectivity between most of the following: Linux
#      pods, Windows pods, K8s services, and the Internet.
#   4) Verifying that basic DNS resolution works in Windows pods.
#
# This script assumes that it is run from the root of the kubernetes repository.
#
# TODOs:
#   - Implement the node-to-pod checks.

Let's look at a class that reaches out to another system, the piece of code that emits the HTTP calls.
At the time of executing a test for the class `DefaultHttpCaller`, the runtime environment needs to be able to reach out to the internet:

.DefaultHttpCaller.java
[source,java]
----
include::{snippetsPath}/developingPlugins/testingPlugins/groovy/url-verifier-plugin/src/main/java/org/myorg/http/DefaultHttpCaller.java[]
----

     * <p>
     * Unless previously downloaded, this method will cause the Gradle runtime for the version specified
     * to be downloaded over the Internet from Gradle's distribution servers.
     * The download will be cached beneath the Gradle User Home directory, the location of which is determined by the following in order of precedence:
     * <ol>

			RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 7}, Value: "City"}},
			RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 10}, Value: "Internet Widgits Pty Ltd"}},
			RelativeDistinguishedNameSET{AttributeTypeAndValue{Type: ObjectIdentifier{2, 5, 4, 3}, Value: "false.example.com"}},

Він був створений для створення HTML у серверній частині, а не для створення API, які використовуються сучасним інтерфейсом (як-от React, Vue.js і Angular) або іншими системами (як-от <abbr title="Internet of Things">IoT</abbr > пристрої), які спілкуються з ним.

### <a href="https://www.django-rest-framework.org/" class="external-link" target="_blank">Django REST Framework</a>

⚫️ 🌅 🌟 🐍 🛠️ & 🛎 🕴. ⚫️ ⚙️ 🏗 ⚙️ 💖 👱📔.

⚫️ 📶 😆 🔗 ⏮️ 🔗 💽 (💖 ✳ ⚖️ ✳),, ✔️ ☁ 💽 (💖 🗄, ✳, 👸, ♒️) 👑 🏪 🚒 🚫 📶 ⏩.

⚫️ ✍ 🏗 🕸 👩‍💻, 🚫 ✍ 🔗 ⚙️ 🏛 🕸 (💖 😥, Vue.js &amp; 📐) ⚖️ 🎏 ⚙️ (💖 <abbr title="Internet of Things">☁</abbr> 📳) 🔗 ⏮️ ⚫️.

### <a href="https://www.django-rest-framework.org/" class="external-link" target="_blank">✳ 🎂 🛠️</a>

✳ 🎂 🛠️ ✍ 🗜 🧰 🏗 🕸 🔗 ⚙️ ✳ 🔘, 📉 🚮 🛠️ 🛠️.

	// - uri: an URI as parsed by Golang net/url.ParseRequestURI
	// - email: an email address as parsed by Golang net/mail.ParseAddress
	// - hostname: a valid representation for an Internet host name, as defined by RFC 1034, section 3.1 [RFC1034].
	// - ipv4: an IPv4 IP as parsed by Golang net.ParseIP
	// - ipv6: an IPv6 IP as parsed by Golang net.ParseIP
	// - cidr: a CIDR as parsed by Golang net.ParseCIDR

Modern ön uçlarda (React, Vue.js ve Angular gibi) veya diğer sistemler (örneğin <abbr title="Nesnelerin interneti: IoT (Internet of Things)">nesnelerin interneti</abbr> cihazları) tarafından kullanılan API'lar yerine arka uçta HTML üretmek için oluşturuldu.

Foi criado para gerar HTML no _backend_, não para criar APIs utilizando um _frontend_ moderno (como React, Vue.js e Angular) ou por outros sistemas (como dispositivos <abbr title="Internet das Coisas">IoT</abbr>) comunicando com ele.

### <a href="https://www.django-rest-framework.org/" class="external-link" target="_blank">Django REST Framework</a>