Is Guest Posting only way to get Quality Links?

[webxerossolutions1]

All I can find regarding link building and link building tactics to get real quality backlinks is by guest posting.

The internet is flooded with discussions about how guest posting can help one webmaster to get quality backlinks.

So, my query here is that is it really the only way or there are some other methods too?

Yes, guest posting is a good way to get quality backlinks. But there are also some other ways to get quality backlinks.
1. Replicate competitors best backlinks
2. Outreach and promote your best content everywhere
3. Build backlinks with infographics
4. Guest blogging
5. Build a solid internal linking structure