Weighted fair queuing (WFQ) is similar to FIFO queuing, except that WFQ grants a higher weight to small flows and flows that are marked with higher DiffServ or IP TOS priorities. This queuing strategy does allow smaller (such as telnet) and higher-priority (such as IP telephony ) protocols to squeeze in before high-flow, for example, ftp packets but does not starve off any traffic. By itself, it is not appropriate for IP telephony traffic because high-flow traffic can still delay IP telephony traffic and cause unacceptable latency and jitter.