bandwidth guarantee; bandwidth reservation
Technical computing term for ensuring a certain amount of network bandwidth is available for a specific application or service.
This service requires a bandwidth guarantee.
Please check the bandwidth reservation settings.
帯域 means 'bandwidth' or 'frequency band', while 帯域確保 specifically refers to the act of guaranteeing or reserving that bandwidth.
確保 is a general term for 'securing' or 'ensuring' something, whereas 帯域確保 is a compound noun limited to the computing domain.
Compound of 帯域 (bandwidth) and 確保 (securing, guarantee). The exact historical derivation is uncertain, but it is a modern technical term.