> For the complete documentation index, see [llms.txt](https://whs3-doge5k.gitbook.io/smartcontract-security-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://whs3-doge5k.gitbook.io/smartcontract-security-docs/basics/5.-metamask/testnet.md).

# Testnet 전환

#### 1. Testnet에 연결하기

<figure><img src="https://2462457462-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FLf9vwRuaws92ULgGvzTi%2Fuploads%2Fel3SXa4z1MkbZyHwfiGN%2Fimage%20(11).png?alt=media&amp;token=7e8f7554-d2eb-48ea-a6f8-b3514d927a76" alt=""><figcaption></figcaption></figure>

* MetaMask에 접속하여 <mark style="color:red;">`Ethereum Mainnet`</mark>을 클릭한다.

<figure><img src="https://2462457462-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FLf9vwRuaws92ULgGvzTi%2Fuploads%2Fm4a3PVETBpZzQxnh5tYd%2Fimage%20(12).png?alt=media&amp;token=c4cfcd09-b456-4161-ab54-549a9509f58c" alt=""><figcaption></figcaption></figure>

* 본 실습 환경에서는 Sepolia를 사용한다.
* <mark style="color:red;">`테스트 네트워크 보기`</mark>를 활성화 해야 Sepolia를 선택할 수 있다.
* 선택하면 다음과 같이 네트워크가 변경된 것을 확인할 수 있다.

<figure><img src="https://2462457462-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FLf9vwRuaws92ULgGvzTi%2Fuploads%2FGLRN1eQSIHI2gWb5tdcj%2Fimage%20(13).png?alt=media&amp;token=b7f24826-de04-47cb-9c74-7776df26f829" alt=""><figcaption></figcaption></figure>

#### 2. 사용자 지정 방식을 통해 소규모의 네트워크도 추가할 수 있다

<figure><img src="https://2462457462-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FLf9vwRuaws92ULgGvzTi%2Fuploads%2F6S0zcsLlsDTBELMit3rK%2Fimage.png?alt=media&amp;token=0d3792e4-a409-4e83-9715-c8bcf0813d76" alt=""><figcaption></figcaption></figure>

<figure><img src="https://2462457462-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FLf9vwRuaws92ULgGvzTi%2Fuploads%2FKMwT5hIsDzmWeWQEr5Nx%2Fimage.png?alt=media&amp;token=c8a64f7f-dc68-4e42-96dd-6a35ada0f89d" alt=""><figcaption></figcaption></figure>

* 활성화 네트워크를 보면 kaia testnet이 추가된 것을 볼 수 있다.

<figure><img src="https://2462457462-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FLf9vwRuaws92ULgGvzTi%2Fuploads%2FsC3oq33VSyJI5DJJ9abQ%2Fimage.png?alt=media&amp;token=7f4df68f-b5f3-4e72-a92c-97a166434543" alt=""><figcaption></figcaption></figure>