All security attacks to cloud computing can be categorised into active and passive attacks. Which of the following attacks are active attacks?

Replaying attack

Man$-$in$-$the$-$middle attack

Ciphertext$-$only attack

Denial of Service attack

Eavesdropping attack

Masquerade attack

Please note that!!

To answer the multiple answer questions, you need to enter all correct options from small to large digits as an integer into the blank. For example, if the correct options are $2,4,6,$ please enter $246$ as an integer $($instead of $426,264,642)$ into the blank. There is no partial credit for multiple answer question.