200-901 Practice Test 37 — 15 Questions

Question 1

A network engineer is configuring a Cisco switch to support LLDP-MED for VoIP phones. Which command is required to enable LLDP globally on the switch?

Accepted Answer

lldp run. The command 'lldp run' is required to enable LLDP globally on a Cisco switch. LLDP is disabled by default on most Cisco switches, and 'lldp run' activates the protocol at the global configuration level, allowing LLDP-MED (which extends LLDP for VoIP and other endpoint devices) to function. Without this global enablement, LLDP frames are not transmitted or received, even if per-interface commands like 'lldp transmit' or 'lldp receive' are configured.

Answer

lldp transmit

Answer

cdp run

Answer

lldp enable

Answer

lldp med

Question 2

You are troubleshooting connectivity for a remote branch office. The branch router (BR) connects to the head office router (HQ) via a point-to-point T1 link. The HQ router is also connected to the internet via a separate interface. Users at the branch can access the internet but cannot reach servers at the head office (subnet 10.10.10.0/24). You run 'show ip route' on BR and see a default route pointing to HQ's IP address, but no specific route for 10.10.10.0/24. The HQ router has a connected route for that subnet. On HQ, you see that the interface towards BR is up/up, and you can ping the BR's interface IP. What is the most likely cause of the issue?

Accepted Answer

The HQ router does not have a route for the branch's local subnet.. The branch router (BR) has a default route pointing to the HQ router, which allows outbound traffic to the internet. However, for traffic from the branch to reach the HQ subnet (10.10.10.0/24), the HQ router must have a return route to the branch's local subnet. Without this specific route, the HQ router will drop packets destined for the branch because it does not know how to reach that network, even though the T1 link is up and the BR can ping the HQ interface. This is a classic asymmetric routing issue where the forward path works but the return path fails.

Answer

An ACL on the HQ router is blocking traffic from the branch subnet.

Answer

The default route on BR is not pointing to the correct next-hop.

Answer

The T1 link is experiencing errors causing packet loss.

Question 3

Which TWO are benefits of using VLANs in a network? (Choose two.)

Accepted Answer

Reducing the size of broadcast domains. VLANs segment a Layer 2 network into isolated broadcast domains. By default, all ports on a switch belong to a single broadcast domain; VLANs restrict broadcast frames (e.g., ARP requests) to only those ports within the same VLAN, reducing unnecessary traffic and improving network performance.

Answer

Simplifying Layer 3 routing

Answer

Reducing the number of collision domains

Answer

Guaranteeing faster routing performance

Question 4

A company has a DHCP server that assigns IP addresses from a scope of 192.168.10.0/24. A new device receives IP 192.168.10.100/24 but cannot access the internet. The default gateway is 192.168.10.1. What is the most likely issue?

Accepted Answer

The default gateway is not reachable from the device.. The device received a valid IP address (192.168.10.100/24) and subnet mask from the DHCP server, but it cannot access the internet. Since the default gateway is 192.168.10.1, the most likely cause is that the device cannot reach the gateway, which is required to route traffic outside the local subnet. Without connectivity to the default gateway, the device cannot forward packets to external networks, even though its IP configuration is otherwise correct.

Answer

DNS server is unreachable.

Answer

The DHCP scope is exhausted.

Answer

The device has a duplicate IP address.

Answer

The device's subnet mask is incorrect.

Question 5

A user reports that they can ping the IP address of the default gateway but cannot ping a server on a different subnet. The administrator checks the ARP table on the user's PC and sees an incomplete entry for the server's IP. What is the most likely cause?

Accepted Answer

The PC is not configured with a default gateway.. The user can ping the default gateway, confirming that the PC has local connectivity and a correctly configured IP address and subnet mask. However, the incomplete ARP entry for the server's IP indicates that the PC cannot resolve the server's MAC address, which is required to send frames to a different subnet. Without a default gateway configured, the PC will not send ARP requests for remote hosts to the router; instead, it will attempt to ARP for the server directly, which fails because the server is on a different broadcast domain.

Answer

There is an IP address conflict on the network.

Answer

Spanning Tree Protocol is blocking the port on the switch.

Answer

A firewall is blocking ICMP packets between subnets.

Question 6

Based on the exhibit, which interface is in a down/down state (both Status and Protocol are down)?

Accepted Answer

GigabitEthernet0/1. The exhibit shows that GigabitEthernet0/1 has both Status and Protocol listed as 'down'. In Cisco IOS, the 'Status' column indicates the line protocol state (Layer 1), and the 'Protocol' column indicates the data link layer state (Layer 2). When both are 'down', the interface is administratively down or has a physical layer issue, such as a disconnected cable or a shutdown command.

Answer

None

Answer

GigabitEthernet0/2

Answer

GigabitEthernet0/0

Question 7

Which TWO of the following are valid Python data types?

Accepted Answer

list. List and set are both built-in Python data types. List is an ordered, mutable collection, while set is an unordered collection of unique elements. Array is not a built-in data type; it is provided by the array module. Dict is also a built-in data type, but the question requires selecting exactly two options, and list and set are the correct ones. Map is a built-in function, not a data type.

Answer

array

Answer

dict

Answer

map

Question 8

A developer wants to retrieve a list of network devices from Cisco DNA Center. Which HTTP method and URL structure should be used?

Accepted Answer

GET /dna/intent/api/v1/network-device. The DNA Center intent API uses GET with the path /dna/intent/api/v1/network-device to retrieve devices.

Answer

POST /dna/intent/api/v1/network-device

Answer

DELETE /dna/intent/api/v1/network-device

Answer

PUT /dna/intent/api/v1/network-device

Question 9

Which Git branching strategy typically involves a long-lived 'develop' branch where feature branches are merged, and releases are created from a 'release' branch?

Accepted Answer

GitFlow. GitFlow is correct because it defines a long-lived 'develop' branch for integrating feature branches, and a separate 'release' branch for preparing releases. This strategy uses dedicated branches for features, releases, and hotfixes, with strict merging rules back to 'develop' and 'main'.

Answer

GitHub Flow

Answer

Trunk-based development

Answer

Feature branch workflow

Question 10

Which TWO of the following are commonly used HTTP methods for a RESTful API to retrieve and update a resource? (Select TWO)

Accepted Answer

GET. GET is correct because it is the HTTP method defined by RFC 7231 for retrieving a representation of a resource. In a RESTful API, a GET request to a resource URI fetches the current state of that resource without side effects, making it idempotent and safe. PUT is correct because it is the HTTP method used to update or replace a resource at a given URI; it is idempotent, meaning multiple identical PUT requests produce the same result as a single request.

Answer

POST

Answer

DELETE

Answer

HEAD

Question 11

Which THREE practices help ensure idempotent network automation? (Select three)

Accepted Answer

Using the 'state' parameter in Ansible modules to define desired state. Using the 'state' parameter in Ansible modules (e.g., 'state: present' or 'state: absent') explicitly declares the desired end state of a resource. This allows the module to compare the current state against the desired state and only make changes if necessary, ensuring that running the playbook multiple times produces the same result without unintended side effects.

Answer

Running commands multiple times to ensure they are applied

Answer

Always appending new configuration commands to the running config

Question 12

A network engineer is configuring a wireless network for a hospital that requires high throughput and minimal interference from neighboring networks. Which set of 2.4 GHz channels should be used for non-overlapping coverage?

Accepted Answer

1, 6, 11. In the 2.4 GHz ISM band, channels 1, 6, and 11 are the only three non-overlapping channels, each separated by 25 MHz, which prevents co-channel interference. This configuration maximizes throughput and minimizes interference from neighboring networks, making it ideal for high-density environments like hospitals.

Answer

2, 7, 12

Answer

1, 5, 9

Answer

1, 3, 5

Question 13

Which two statements are true about Cisco DevNet Sandboxes?

Accepted Answer

DevNet Sandboxes include reserved labs for fixed time periods and always-on labs.. DevNet Sandboxes offer two primary reservation models: reserved labs, which provide exclusive access to a sandbox for a fixed time period (e.g., 4 hours), and always-on labs, which are perpetually available but shared among users. This flexibility allows developers to choose between dedicated, time-limited environments for intensive testing and persistent, always-available environments for ongoing development and learning.

Answer

DevNet Sandboxes are only available with a paid subscription.

Answer

DevNet Sandboxes only support Cisco Catalyst switches.

Answer

DevNet Sandboxes do not support third-party devices.

Question 14

A developer is writing an application that needs to send a large amount of data reliably over a network. Which transport layer protocol should the developer use?

Accepted Answer

TCP. TCP (Transmission Control Protocol) is the correct choice because it provides reliable, connection-oriented data delivery with acknowledgments, retransmission, and sequencing. This ensures that large amounts of data are transmitted without loss or corruption, which is critical for applications requiring data integrity.

Answer

ICMP

Answer

HTTP

Answer

UDP

Question 15

An organization uses Cisco ISE for network access control. A user reports inability to access the network. The switch port shows the authenticator state as 'connecting'. What does this indicate?

Accepted Answer

The client is in the process of 802.1X authentication. In Cisco ISE and 802.1X, the authenticator state 'connecting' indicates that the switch (authenticator) has detected a new client on the port and has initiated the 802.1X authentication process. This state means the port is actively sending EAP-Request/Identity frames and waiting for the client to respond, so the client is in the process of authentication, not yet authenticated or failed.

Answer

The client has successfully authenticated

Answer

The port is in a held state due to multiple failures

Answer

Authentication has failed