sequential (-4)

https://wodewangzhishime.blogspot.com/2021/07/httpswodewangzhishime_5.html

.

Ref: https://wodewangzhishime.blogspot.com/2021/08/blog-post_35.html.

.

.

.

While (Domain name server is running)

{

If (Download = John)

{

 ("download.com","111.111") <--- It is a software with virus.

}

else

{

Bind ("download.com", "123.132") 

}

}

.

John: It is one of the way of spreading the electronic virus. In fact 111.111 is another server.