issue found in a stream-based transport such as TCP/IP. io.netty.handler.codec.compression Encoder and decoder which compresses and decompresses ByteBuf s in a compression format such as zlib and gzip . io.netty.handler.logging Logs a io.netty.channel.ChannelEvent for debugging purpose using an InternalLogger . io.netty.handler.ssl SSL · TLS implementation based on SSLEngine Uses of ChannelOutboundByteHandler