Through his speech, I learned why we need to use duo, which makes me hate the second verification method. But I maintain my opinion that the school’s DUO can only be waived for one day at a time, while MU can be 14 days and UCB can be one month. I think students frequently log in to the campus network. In fact, the probability of account loss is not high, and even if they are lost, they can be recovered quickly. Of course I understand the necessity of doing so. Network security is very important, but I still think that the user experience is also an important part.