Which of the following Cisco switches can be configured only by first using Telnet or SSH to access a parent device?
- Nexus 7000 Series
- Nexus 2000 Series
- Nexus 5000 Series
- Nexus 9000 Series
Of the available choices, Cisco Nexus 2000 Series switches can be configured only by first using Telnet or Secure Shell (SSH) to access a parent device. The Cisco Nexus 2000 Series of switches are fabric extenders (FEXs) and cannot operate as standalone switches. FEX technologies depend on parent switches, such as a Cisco Nexus 5500 Series switch or a Cisco Nexus 7000 Series switch, to provide forwarding tables and control plane functionality. FEX technologies are intended to extend the network to edge devices. Typically, FEX devices in the Cisco Nexus 2000 Series are managed by first connecting to the parent device by using either Telnet or SSH and then configuring the FEX.
Cisco Nexus 5000 Series switches operate as standalone physical switches. Cisco Nexus 5000 Series switches are data center access layer switches that can support 10-gigabit-per-second (Gbps) or 40-Gbps Ethernet, depending on the model. Native Fibre Channel (FC) and FC over Ethernet (FCoE) are also supported by Cisco Nexus 5000 Series switches.
Cisco Nexus 7000 Series switches operate as standalone physical switches. Cisco Nexus 7000 Series switches are typically used as an end-to-end data center solution, which means that the series is capable of supporting all three layers of the data center architecture: core layer, aggregation layer, and access layer. In addition, the Cisco Nexus 7000 Series supports virtual device contexts (VDCs). The Cisco Nexus 7000 Series can support up to 100-Gbps Ethernet.
Cisco Nexus 9000 Series switches operate as standalone physical switches. Cisco Nexus 9000 Series switches can operate either as traditional NX-OS switches or in an Application Centric Infrastructure (ACI) mode. Unlike Cisco Nexus 7000 Series, Cisco Nexus 9000 Series switches do not support VDCs or storage protocols.