diff --git a/episode_17_18_19/manual/ ICMPv4.pdf b/episode_17_18_19/manual/ ICMPv4.pdf new file mode 100644 index 0000000..b748f2b Binary files /dev/null and b/episode_17_18_19/manual/ ICMPv4.pdf differ diff --git a/episode_17_18_19/manual/IPv4.pdf b/episode_17_18_19/manual/IPv4.pdf new file mode 100644 index 0000000..034c008 Binary files /dev/null and b/episode_17_18_19/manual/IPv4.pdf differ diff --git a/episode_17_18_19/manual/tcp-ip.pdf b/episode_17_18_19/manual/tcp-ip.pdf new file mode 100644 index 0000000..05727c2 Binary files /dev/null and b/episode_17_18_19/manual/tcp-ip.pdf differ