UDP: more o offen used for streaming multimedia apps 32 bits o loss tolerant Length source port dest port o rate sensitive bytes of UDP length checksum 口 other UDP uses segment IncludIng (why? ) eader O DNS O SNMP Application g reliable transfer over UDP data add reliability at message applicaTion layer o application-specific UDP segment format error recover 3: Transport Layer 3a-83: Transport Layer 3a-8 UDP: more  often used for streaming multimedia apps  loss tolerant  rate sensitive  other UDP uses (why?):  DNS  SNMP  reliable transfer over UDP: add reliability at application layer  application-specific error recover! source port # dest port # 32 bits Application data (message) UDP segment format length checksum Length, in bytes of UDP segment, including header