350-401 REST APIs and Data Models Practice Test 2 — 15 Questions

Question 1

An engineer is using the Cisco IOS-XE RESTCONF API to create a new loopback interface. The following JSON payload is sent in a POST request to '/restconf/data/ietf-interfaces:interfaces':

```json
{
  "ietf-interfaces:interface": [
    {
      "name": "Loopback100",
      "description": "Management Loopback",
      "type": "iana-if-type:softwareLoopback",
      "enabled": true,
      "ietf-ip:ipv4": {
        "address": [
          {
            "ip": "192.168.1.1",
            "netmask": "255.255.255.0"
          }
        ]
      }
    }
  ]
}
```

What is the correct HTTP method and URL for this operation?

Accepted Answer

POST /restconf/data/ietf-interfaces:interfaces. To create a new resource, the POST method is used. The URL should point to the collection of interfaces. The payload includes the 'ietf-interfaces:interface' list. The correct URL is '/restconf/data/ietf-interfaces:interfaces'.

Answer

PUT /restconf/data/ietf-interfaces:interfaces

Answer

PATCH /restconf/data/ietf-interfaces:interfaces

Answer

POST /restconf/data/ietf-interfaces:interfaces/interface=Loopback100

Question 2

An Ansible playbook uses the cisco.ios.ios_l3_interfaces module to configure an IPv4 address on GigabitEthernet0/1:

```yaml
---
- name: Configure IPv4 address
  hosts: cisco-routers
  gather_facts: no
  tasks:
    - name: Set IP address
      cisco.ios.ios_l3_interfaces:
        config:
          - name: GigabitEthernet0/1
            ipv4:
              - address: 10.1.1.1/24
        state: merged
```

What is the effect of the 'state: merged' parameter?

Accepted Answer

It adds the IP address to the interface, merging with any existing configuration.. The 'merged' state adds the provided configuration to the existing configuration without removing any other settings. If the interface already has an IP address, it will be replaced only if the address is different; otherwise, it remains unchanged.

Answer

It replaces the entire L3 configuration on the interface with only the provided address.

Answer

It deletes the IP address if it exists.

Answer

It only checks the configuration without making changes.

Question 3

A network engineer is using the Cisco DNA Center API to initiate a network discovery. The API endpoint '/dna/intent/api/v1/discovery' is called with a POST request containing the following JSON payload:

```json
{
  "discoveryType": "Range",
  "ipAddressList": "10.10.20.1-10.10.20.254",
  "protocolOrder": "SSH",
  "timeout": 5,
  "retryCount": 3
}
```

The API returns a 202 Accepted status code. What does this indicate?

Accepted Answer

The discovery has been accepted and is being processed asynchronously.. A 202 Accepted status code means the request has been accepted for processing, but the processing has not been completed. The discovery is asynchronous and will continue in the background.

Answer

The discovery was completed successfully and devices are added.

Answer

The request is invalid and the payload needs correction.

Answer

The server is busy and the request is queued.

Question 4

Examine the following configuration snippet applied to a Cisco IOS-XE device:

interface GigabitEthernet0/1
 ip address 10.1.1.1 255.255.255.0
 ip nat inside
!
interface GigabitEthernet0/2
 ip address 192.168.1.1 255.255.255.0
 ip nat outside
!
access-list 100 permit ip 10.1.1.0 0.0.0.255 any
ip nat inside source list 100 interface GigabitEthernet0/2 overload

What is the effect of this configuration?

Accepted Answer

It translates all IP traffic from 10.1.1.0/24 to the IP address 192.168.1.1 using port address translation.. This is a standard NAT overload (PAT) configuration. The inside network 10.1.1.0/24 is translated to the IP address of the outside interface (GigabitEthernet0/2) with port multiplexing.

Answer

It performs static NAT for the host 10.1.1.1 to 192.168.1.1.

Answer

It translates all traffic from 192.168.1.0/24 to the IP address 10.1.1.1.

Answer

It allows all IP traffic from any source to any destination without translation.

Question 5

Given the following configuration on a Cisco IOS-XE device:

router ospf 1
 network 10.0.0.0 0.255.255.255 area 0
!
interface GigabitEthernet0/0
 ip address 10.1.1.1 255.255.255.0
 ip ospf cost 10
!
interface GigabitEthernet0/1
 ip address 10.2.2.1 255.255.255.0
!

Which statement is true about OSPF operation?

Accepted Answer

GigabitEthernet0/0 will have an OSPF cost of 10, and GigabitEthernet0/1 will have a default cost based on its bandwidth.. The 'ip ospf cost' command overrides the default cost calculation based on bandwidth. The network command matches both interfaces because they fall under 10.0.0.0/8.

Answer

Both interfaces will have an OSPF cost of 10.

Answer

Both interfaces will have the same OSPF cost because they are in the same area.

Answer

OSPF will not run on either interface because the network command uses a wildcard mask of 0.255.255.255.

Question 6

Consider the following configuration for a Cisco IOS-XE device:

interface GigabitEthernet0/0
 ip address 192.168.1.1 255.255.255.0
 standby 1 ip 192.168.1.254
 standby 1 priority 150
 standby 1 preempt
!
interface GigabitEthernet0/1
 ip address 192.168.2.1 255.255.255.0
 standby 2 ip 192.168.2.254
 standby 2 priority 100

What is the effect of this HSRP configuration?

Accepted Answer

For group 1, this router will be active and will preempt if a higher-priority router fails. For group 2, it will be active or standby depending on other routers, but will not preempt.. HSRP uses priority to determine the active router. Preempt allows a higher-priority router to become active after a failure. Without preempt, the current active router remains active even if a higher-priority router comes online.

Answer

For group 1, this router will be active if it has the highest priority, and for group 2, it will be standby because priority is 100.

Answer

Both groups will have this router as active because it is configured on both interfaces.

Answer

The configuration is invalid because HSRP group numbers must be unique across all interfaces.

Question 7

Examine the following EIGRP configuration on a Cisco IOS-XE device:

router eigrp 100
 network 10.0.0.0 0.255.255.255
 passive-interface default
 no passive-interface GigabitEthernet0/0
!
interface GigabitEthernet0/0
 ip address 10.1.1.1 255.255.255.0
!
interface GigabitEthernet0/1
 ip address 10.2.2.1 255.255.255.0

Which statement is true?

Accepted Answer

EIGRP will form an adjacency only on GigabitEthernet0/0.. The 'passive-interface default' command sets all interfaces as passive, meaning they do not send or receive EIGRP hellos. The 'no passive-interface' command overrides this for specific interfaces.

Answer

EIGRP will form adjacencies on both GigabitEthernet0/0 and GigabitEthernet0/1.

Answer

EIGRP will not form any adjacencies because the network command does not match the interface subnets.

Answer

EIGRP will form adjacencies on all interfaces except those with 'passive-interface' configured.

Question 8

Given the following BGP configuration on a Cisco IOS-XE device:

router bgp 65001
 bgp router-id 1.1.1.1
 neighbor 10.0.0.2 remote-as 65002
 neighbor 10.0.0.2 update-source Loopback0
 neighbor 10.0.0.2 ebgp-multihop 2
!
interface Loopback0
 ip address 1.1.1.1 255.255.255.255
!
interface GigabitEthernet0/0
 ip address 10.0.0.1 255.255.255.252

What is the purpose of the 'ebgp-multihop 2' command?

Accepted Answer

It allows the BGP session to be established even if the neighbor is not directly connected, with a maximum of 2 hops.. EBGP multihop allows the BGP session to be established between non-directly connected peers. The number specifies the maximum TTL for the BGP packets. Here, TTL=2 allows one intermediate hop.

Answer

It sets the BGP session to use two TCP connections for redundancy.

Answer

It enables BGP to use two different paths to reach the neighbor.

Answer

It is required because the neighbor is configured with a loopback interface as the update source.

Question 9

Examine the following configuration for a Cisco IOS-XE device:

interface GigabitEthernet0/0
 ip address 10.0.0.1 255.255.255.252
 ipv6 address 2001:db8::1/64
 ipv6 ospf 1 area 0
!
interface GigabitEthernet0/1
 ip address 192.168.1.1 255.255.255.0
 ipv6 address 2001:db8:1::1/64
 ipv6 ospf 1 area 0
!
ipv6 router ospf 1
 router-id 2.2.2.2

Which statement is true about OSPFv3 operation?

Accepted Answer

OSPFv3 will form adjacencies over both interfaces using link-local addresses.. OSPFv3 runs per interface and uses link-local addresses for neighbor discovery. The router-id is required and must be unique. Both interfaces are in area 0.

Answer

OSPFv3 will form adjacencies over both interfaces using the configured IPv6 addresses.

Answer

OSPFv3 will only run on GigabitEthernet0/0 because the router-id is not configured for GigabitEthernet0/1.

Answer

OSPFv3 requires an explicit network command under the OSPFv3 process to enable on interfaces.

Question 10

What is the default OSPF hello interval on an Ethernet link in Cisco IOS?

Accepted Answer

10 seconds. OSPF hello intervals are network-type dependent. On broadcast and point-to-point networks (including Ethernet), the default hello interval is 10 seconds.

Answer

30 seconds

Answer

5 seconds

Answer

40 seconds

Question 11

Which BGP attribute is preferred when it has the lowest value?

Accepted Answer

MED (Multi-Exit Discriminator). BGP uses multiple attributes in its path selection algorithm. The weight attribute is Cisco-specific and is preferred with the highest value. The local preference is also preferred with the highest value. The MED (Multi-Exit Discriminator) is preferred with the lowest value.

Answer

Weight

Answer

Local Preference

Answer

AS Path Length

Question 12

What is the maximum hop count for EIGRP?

Accepted Answer

255. EIGRP uses a hop count metric as one of the components in its composite metric. The maximum hop count is 255, which is also the default administrative distance for EIGRP internal routes.

Answer

15

Answer

100

Answer

16

Question 13

Drag and drop the steps of a RESTCONF PUT transaction on IOS-XE into the correct order, from first to last.

Accepted Answer

Authenticate with the IOS-XE device. The correct order ensures the RESTCONF PUT request is properly authenticated, targeted, and validated before the device applies the configuration. First, the client must authenticate with the device. Then it constructs the PUT request with the target URI. The device validates the request, applies the configuration, and finally sends a success response.

Question 14

Drag and drop the steps of a NETCONF get-config operation into the correct order, from first to last.

Accepted Answer

Establish SSH session to the device. The NETCONF get-config operation begins with establishing a secure SSH session, then the client sends a hello message to exchange capabilities. After the server responds with its hello, the client sends the get-config request. The server retrieves the configuration and sends the reply.

Question 15

Drag and drop the steps of using a REST API to retrieve interface statistics from a Cisco device into the correct order, from first to last.

Accepted Answer

Authenticate with the REST API. The process starts with authenticating to the device's REST API, then constructing the GET request for the interface statistics endpoint. The device processes the request, retrieves the data, and sends a JSON response. The client then parses the JSON to extract the statistics.