Which of the following are disadvantages of link-state routing? (Choose three.)

• Link-state protocols require careful network design.*
• Link-state protocols are prone to routing loops.
• Link-state hello updates can cause broadcast flooding.
• Link-state protocols place significant demands on router processors and memory resources.
• Link-state protocols require a knowledgeable network administrator.*
• Link-state protocols do not support Variable Length Subnet Masking.*