問題文
A retailer wants branch traffic to stop riding an expensive reserved line and still survive a line failure. What does the overlay let the branches ride instead, and what happens to a voice call at the moment a line drops?
選択肢
- The overlay lets the branches ride costly dedicated circuits between the sites, and a voice call at the moment a line drops is restarted without signal by the infrastructure.
- The overlay lets the branches ride cheaper broadband links between the sites, and a voice call at the moment a line drops is restarted without signal by the infrastructure.
- The overlay lets the branches ride cheaper broadband links between the sites, and a voice call at the moment a line drops is kept without interruption by the infrastructure.
- The overlay lets the branches ride costly dedicated circuits between the sites, and a voice call at the moment a line drops is kept without interruption by the infrastructure.