CISCO 010-151 Supporting Cisco Data Center Networking Devices Free Practice Test — 30 Questions
This practice bank exercises foundational knowledge in Cisco data center networking, covering VLANs, trunking, Spanning Tree Protocol, and common switch issues (BPDU guard, errdisable, high CPU). It also tests understanding of Nexus features (VDC, FEX, Data Broker), UCS service profiles, and Ethernet standards (802.3ae). Troubleshooting remote access (SSH, Telnet) and connectivity (ping) is emphasized. The deck prepares you to recall key concepts, identify causes of failures, and apply configuration steps in a data center environment.
What this 010-151 practice set measures
This is an analysis of the practice bank, not a claim about the vendor's live exam blueprint. Use it to identify the knowledge, judgment, and recall patterns exercised here, then verify your coverage against the current official exam guide.
VLANs, Trunking, and Ethernet Standards
VLANs logically segment a physical network into multiple virtual networks, improving efficiency and security. Trunking carries multiple VLANs over a single link using tagging (802.1Q or ISL). Dynamic trunking protocol negotiates trunking automatically. Ethernet standards like IEEE 802.3ae define 100 Gigabit Ethernet over fiber. Understanding these fundamentals is essential for configuring and troubleshooting data center switches.
- VLANs provide segmentation at Layer 2.
- Trunking uses tagging to identify VLAN membership.
- IEEE 802.3ae specifies 100GbE over fiber.
- Dynamic trunking negotiates trunk links between switches.
Switch Troubleshooting and Security Features
Common switch issues include BPDU guard violations (due to STP loop or excessive broadcast), high CPU from broadcast storms, and errdisabled ports. Troubleshooting starts with physical layer checks, then verification of STP configuration, and remote access settings (SSH, Telnet). Misconfigured authentication, disabled services, or ACLs can block connections. Ping failures often result from routing misconfigurations.
- BPDU guard disables ports to prevent loops.
- High CPU is often caused by excessive broadcast traffic.
- SSH/Telnet issues require checking service state and authentication.
- Ping failures may indicate missing routes or incorrect addressing.
Cisco Nexus Virtualization: VDC, FEX, and Data Broker
The Cisco Nexus Virtual Device Context (VDC) partitions a physical switch into multiple virtual switches, each with independent management. Fabric Extender (FEX) provides server connectivity without additional switch ports, simplifying cabling. Data Broker aggregates and distributes network traffic for monitoring and analysis. These features enhance scalability and operational efficiency in data centers.
- VDC creates independent virtual switches on one physical chassis.
- FEX extends the fabric to servers for simplified management.
- Data Broker captures and filters traffic for security and troubleshooting.
- Cisco Nexus 9000 supports VXLAN and ACI for programmable networks.
Cisco UCS and Application Centric Infrastructure
Cisco UCS integrates compute, storage, and networking with service profiles for automated provisioning. Server profiles abstract hardware configurations, enabling rapid deployment and migration. ACI provides policy-driven automation and application profiles for SDN. The MDS 9000 Series supports Fibre Channel and FCoE for storage networking. Understanding these platforms is critical for data center design and management.
- UCS Manager uses service profiles for flexibility and automation.
- Cisco ACI offers centralized policy-driven network management.
- MDS 9000 provides Fibre Channel and FCoE storage networking.
- Server profiles allow abstraction of BIOS, firmware, and network settings.
Practice CISCO 010-151 Supporting Cisco Data Center Networking Devices with real flashcards
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What is the purpose of VLAN trunking in Cisco networking?
Study workflow
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- 1
Troubleshoot BPDU Guard Violation
When a Nexus switch port enters errdisabled due to BPDU guard, first verify that no unauthorized devices are sending BPDUs. Check if STP is properly configured. Re-enable the port with 'shutdown' followed by 'no shutdown'. If the issue recurs, examine the network topology for loops and ensure all ports are using portfast where appropriate.
- 2
Configure SSH on a Cisco Nexus Switch
To enable SSH, first generate RSA keys using 'crypto key generate rsa'. Set the SSH version with 'ip ssh version 2'. Configure authentication via local username/password or AAA. Finally, ensure the VTY lines allow SSH transport using 'line vty' and 'transport input ssh'. Test connectivity from a remote host.
- 3
Verify VLAN Trunking Configuration
On Cisco Nexus, use 'show interface trunk' to see trunk ports and allowed VLANs. To configure a trunk, set the interface to 'switchport mode trunk' and specify allowed VLANs. Ensure the native VLAN matches on both ends. For dynamic negotiation, use 'switchport mode dynamic desirable' or 'auto' as needed.
- 4
Create and Use a Virtual Device Context (VDC)
To create a VDC on a Nexus 7000 or 7700, use 'vdc <name>' in global config. Allocate resources like memory and interfaces with 'allocate'. Then enter the VDC context with 'switchto vdc <name>'. Each VDC has its own management IP, config, and run state, allowing administrative isolation.
- 5
Deploy a Service Profile in Cisco UCS Manager
In UCS Manager, navigate to Servers > Service Profiles > Create Service Profile. Assign a name, UUID, and LAN/SAN connectivity policies. Bind it to a service profile template for consistency. Then associate it with a physical blade by specifying a pool or selecting a specific server. The server will automatically boot with the defined configuration.
FAQ
Questions about this 010-151 practice page
Clear boundaries on what the bank covers, how to use it, and where official vendor information still matters.
What is the purpose of VLAN trunking in Cisco networking?+
VLAN trunking allows traffic from multiple VLANs to traverse a single link between switches. It uses tagging (IEEE 802.1Q or ISL) to identify each frame's VLAN, enabling efficient use of ports and simplifying network topology.
How does the Cisco Nexus VDC feature benefit data center operations?+
VDC (Virtual Device Context) logically partitions one physical Nexus switch into multiple independent virtual switches. Each VDC has its own configuration, protocols, and management, allowing for multi-tenant isolation and administrative separation without additional hardware.
What is the role of the Cisco Nexus Fabric Extender (FEX)?+
The FEX extends the switch fabric to servers by acting as a remote line card. It provides server connectivity using simplified cabling and centralizes management. The parent switch manages all FEX-attached ports, reducing the need for standalone access switches.
What are common causes of SSH connection failures to a Cisco Nexus switch?+
Common causes include SSH not being enabled, incorrect RSA key generation, wrong SSH version, misconfigured VTY transport, ACL blocking SSH traffic, or authentication issues (local or AAA). Check 'show ssh' and 'ip ssh' details.
How does Cisco ACI differ from traditional networking?+
Cisco ACI (Application Centric Infrastructure) uses a policy-driven model where network policies are defined based on application requirements. It centralizes automation through the APIC controller, supports VXLAN overlays, and provides granular visibility and management compared to manual CLI-based configuration.
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