DirectX SDK

N

nagling
An algorithm that causes the TCP/IP service provider to buffer small data packets into larger ones before sending. Nagling prevents a TCP/IP server from transmitting many very small packets by requiring the server to wait either until it has accumulated enough small data packets to combine them into a single large packet or until it has received an acknowledgment of the prior packet. Nagling can reduce message overhead (and decrease required bandwidth), but also causes a delay before small data packets are sent (increasing latency).
normal vector
An imaginary ray extending perpendicularly from a surface that defines the face's orientation.