1. Which characteristic best describes the control plane of a networking device? (Choose three.)
- Information sent to this plane is processed by the CPU.
- This plane is also called the forwarding plane.
- This plane makes forwarding decisions.
- This plane contains router protocol neighbor and topology tables.
- This plane is responsible for switching frames out the interfaces.
Explanation: The control plane is typically regarded as the brains of a device. It is used to make forwarding decisions. The control plane contains Layer 2 and Layer 3 route forwarding mechanisms, such as routing protocol neighbor tables and topology tables, IPv4 and IPv6 routing tables, STP, and the ARP table. Information sent to the control plane is processed by the CPU.
2. Which characteristics best describe the data plane of a networking device? (Choose three.)
- This plane is the brains of the device.
- This plane is used to forward traffic flows.
- Information in this plane is typically processed by a special processor.
- This plane contains IPv4 and IPv6 routing tables.
- This plane is typically made up of a switch fabric connecting the various ports on a device.
Explanation: The data plane is also called the forwarding plane. It is typically the switch fabric connecting the various network ports on a device. Routers and switches use information from the control plane to forward incoming traffic out the appropriate egress interface. Information in the data plane is typically processed by a special data plane processor without the CPU getting involved.
3. True of False. A network administrator accesses the control plane to configure a device.
- True
- False
Explanation: The correct answer is False. Network administrators use applications such as Secure Shell (SSH), Trivial File Transfer Protocol (TFTP), Secure FTP, and Secure Hypertext Transfer Protocol (HTTPS) to access the management plane and configure a device.
4. This network architecture offers a new approach to network administration and management that seeks to simplify and streamline the administration process.
- network virtualization
- SDN
- Cisco ACI
- centralized controller
Explanation: Software-defined networking (SDN) is a network architecture that virtualizes the network, offering a new approach to network administration and management that seeks to simplify and streamline the administration process.
5. This is a logical entity that enables network administrators to manage and dictate how the data plane of switches and routers should handle network traffic.
- control plane
- data plane
- VM
- SDN controller
Explanation: The SDN controller is a logical entity that enables network administrators to manage and dictate how the data plane of switches and routers should handle network traffic.
6. This is a standardized request from the SDN controller to define the behavior of the data plane.
- North-South traffic
- Northbound APIs
- East-West traffic
- Southbound APIs
Explanation: The SDN controller uses southbound APIs to define the behavior of the data planes on downstream switches and routers.