CCIE Data Center Written Exam

Here you have the best Cisco 400-151 practice exam questions

You have 104 total questions to study from
Each page has 5 questions, making a total of 21 pages
You can navigate through the pages using the buttons at the bottom
This questions were last updated on December 16, 2024

Question 1 of 104

Which statement about VTP bombing is true?

It occurs because of configuration mismatch on VTPv3 switches. This problem can be avoided using a confirmation management tool.

It occurs when switches with different VTP versions are connected together. This situation may occur when a new switch is plugged into a stable VTP domain. The MAC address table of the new switch overrides the MAC address table of stable switches causing interruption of service.

It occurs when a client connects to a switch and launches a distributed denial of service attack against the VTP domain. This attack is possible only ifthe client knows the VTP password.

It occurs when a server with a higher revision number and a wrong VTP database is inserted into the VTP domain. This situation may occur when a new switch plugged into a stable VTP domain. The incorrect database is propagated to the domain and the earlier stable database is overwritten. D

Correct Answer:

Question 2 of 104

Which statement about glean throttling in Cisco NX-OS is true?

The traffic shaping feature in Cisco NX-OS to avoid bottle necks in the network.

Cisco NX-OS supports a rate-limiting feature to manage the access bandwidth policy for a network by ensuring that traffic falling within specified rate parameters is sent, while dropping packets that exceed the acceptable amount of traffic or sending them a different priority.

When forwarding an incoming IP packet in a line card, if the Address Resolution Protocol request for the next hop is not resolved, the line card forwards the packets to the supervisor. The supervisor resolves the MAC address for the next hop and programs the hardware.

The traffic policing feature manages the maximum rate of traffic through a token bucket algorithm. The token bucket algorithm can use the user-configured values to determine the maximum rate of traffic allowed on an interface at a given moment in time.

Correct Answer: C

Glean throttling in Cisco NX-OS refers to the process by which a line card, upon receiving an incoming IP packet, will forward packets to the supervisor if the Address Resolution Protocol (ARP) request for the next hop is unresolved. The supervisor then resolves the MAC address for the next hop and programs the necessary hardware. This is a mechanism to handle unresolved ARP requests and manage the forwarding process efficiently.

Question 3 of 104

Refer to the exhibit. ITD is configured as shown on a Cisco Nexus 7000 switch. Why is ping address still not working?

Fail actions is set to the wrong mode.

This behavior is normal.

To ping, you must add a probe to the device group.

VIP must be from the same subnet as the ingress interface.

Correct Answer: D

The VIP address and the ingress interface are on different subnets. The VIP address is 192.168.30.1/32, while the ingress interface is 192.168.20.1/24. To ensure proper routing and communication, they should be on the same subnet.

Question 4 of 104

Which two options does ITD replace? (Choose two.)

policy-based routing

Layer 4 load balancer

access lists

Layer 7 load balancer

IP SLA

WCCP

Correct Answer: A, B

Intelligent Traffic Director (ITD) replaces policy-based routing because it provides an advanced method for directing traffic without manually setting policies. It also replaces Layer 4 load balancers because ITD can balance traffic across multiple servers based on more sophisticated criteria, thereby performing the functions previously managed by Layer 4 load balancers.

Question 5 of 104

On which two features does ITD depend? (Choose two.)

BFD

PBR

WCCP

Netflow

IP SLA

interface-vlan BD

Correct Answer:

Intelligent Traffic Director (ITD) in networking is a Cisco feature that balances traffic loads across multiple physical or virtual appliances. It primarily depends on Policy-Based Routing (PBR) and IP Service Level Agreements (IP SLA). PBR allows the network to make forwarding decisions based on policies set by the network administrator, which is crucial for effectively directing traffic in an ITD setup. IP SLA, on the other hand, measures network performance and provides information about the availability and response time of services, which is essential for monitoring and ensuring the efficiency of ITD operations. Therefore, the two correct features that ITD depends on are PBR and IP SLA.