Sammi works for a finance company and has a laptop that he uses for his work. He has confidential data about his customers stored on his laptop. Sammi does not connect the laptop to any networks.

1. (a)Sammi is concerned about his customers' confidential data being viewed by other people in his office. One method he uses to prevent others viewing the data is encryption. Identify three other methods Sammi could use to prevent his customers' confidential data being viewed. 1 2 3[3]
2. (b)(i)Sammi creates videos for the finance company website that give customers advice about their finances. He uses lossy compression to reduce the file size of the videos for the website. (i) Give three ways that lossy compression can reduce the file size of the videos. 1 2 3[3]
3. (b)(ii)(ii) Give one drawback of using lossy compression to reduce the file size of the videos.[1]
4. (c)(i)Sammi could have used lossless compression to compress the videos for the website. (i) Give one reason why he would use lossless compression, rather than lossy compression, for the videos.[1]
5. (c)(ii)(ii) Give two disadvantages of Sammi using lossless compression, rather than lossy compression, for the videos. Disadvantage 1 Disadvantage 2[2]