diff --git a/2021/schemes/of-net-2021.pdf b/2021/schemes/of-net-2021.pdf new file mode 100755 index 0000000..8c2541e Binary files /dev/null and b/2021/schemes/of-net-2021.pdf differ diff --git a/2021/schemes/of-net-2021.vsd b/2021/schemes/of-net-2021.vsd new file mode 100755 index 0000000..7c4eb80 Binary files /dev/null and b/2021/schemes/of-net-2021.vsd differ