The io-pkt networking stack doesn't support the following features:

• npm-qnet-compat.so (Neutrino 6.2.1 Qnet compatibility protocol)
• npm-ttcpip.so (tiny TCP/IP) stack

In order to conserve network bandwidth and to provide support for atomic operations, combine messages are supported. A combine message is constructed by the client's C library and consists of a number of I/O and/or connect messages packaged together into one. Let's see how they're used.