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CCNA COPY PLUS > 21 Network Automation II > Flashcards

21 Network Automation II Flashcards

1
Q

What language uses mapping to define keys and values as pairs and always begins with three dashes?

A

YAML

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2
Q

What language is close to HTML

A

XML

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3
Q

What language uses white space structured file.

A

YAML

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4
Q

NETCONF was created to replace what protocol?

A

NETCONF was created to replace SNMP.

it was designed to interface with network devices over the SSH protocol.

Must adhere to YANG protocol
Yet Another Next Generation

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5
Q

Describe SD-WAN

A

SD-WAN is a term used with controller based networking that combines multiple sites to act as one single network.

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6
Q

What is NMS?

A

NMS - Network Management System.

NMS is used by SNMP to collect all messages and poll metrics from all managed devices.

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7
Q

What does Cisco Prime Infrastructure use as a method of configuration?

A

CPI uses SNMP with Telnet and SSH as a method of configuration.

Also provides config backups where DNA Center doesn’t.

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8
Q

T/F -

APIC-EM is a part of cisco’s DNA center.

A

False

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9
Q

What does DNA stand for?

A

Digital Network Architecture

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10
Q

What does ROBO stand for?

A

Remote Office Branch Office

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11
Q

How is STP used to control the Data plane?

A

STP is used to control the data plane by removing redundant links.

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12
Q

What protocols are use by the Management plane?

A

SSH
Telnet
Syslog
CDP

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13
Q

What protocols are used by the Control plane?

A

ACL
OSPF
EIGRP
All of which help control the routing of the data plane.

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14
Q

What is the max hop count on fabric switches?

A

3 Hops.

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15
Q

What does DMVPN stand for?

A

Dynamic Multipoint VPN

WAN tech that allows for VPNs to be created using the overlay of SDN

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16
Q

Describe ECMP.

A

Equal Cost Multi Path routing used by leaf spine switches to provide next hop packet forwarding decisions.

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17
Q

Describe VXLAN protocol.

A

VXLAN is a protocol that is used to create layer 2 tunnels over a layer 3 network. Encapsulates layer 2 traffic in a layer 3 packet.

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18
Q

What does the DNA Assurance section allow you to view/see?

A

DNA assurance section allows you to see overall health of devices managed by DNA center.

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19
Q

What is the function of the DNA Policy section?

A

DNA Policy section allows you to create policies based on apps, traffic and ip based acl’s.

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20
Q

What is the function of the DNA Provision section?

A

You can view how everything is connected from here.

  • View and manage inventory of routers, switches, AP’s and WLCs.
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21
Q

What is the function of the DNA Platform section?

A

You can see the details of an API for DNA Center.

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22
Q

What is the function of the Cisco SD-Access?

A

Cisco’s SD-Access automates the fabric of the under and overlay of the network.

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23
Q

What must be configured in DNA Center for network discovery to work?

A

SSH and SNMP

24
Q

Explain Authentication with DNA Center.

A

Sends post request to the API for an auth Token.
- Uses token for all subsequent requests.

dna/system/api/vi/auth/token

After initial post to obtain token it should be palced in the header of subsequent requests as an xauth token element.

  • Username and password is encoded in Base 64 encoding.
25
Q

When a request is used with RESTCONF the data is sent via http using?

A

MIME - Multipurpose Internet Mail Extension.

26
Q

What does the 500 status code message indicate?

A

Service requested is down. Internal server error restart REST based services.

27
Q

What does the 400 status code message indicate?

A

Issue with the formatting of your request. a command is missing parameters

28
Q

What does the 403 status code message indicate?

A

Suggests that you have not authenticated to the SDN. command is restricted for the auth supplied.

29
Q

Status code is sent via?

A

http

30
Q

What does the 201 status code error message indicate?

A

It means that an item has been created.

31
Q

What does the 200 status error message indicate?

A

Patch or Get.

32
Q

What does “?” signify in a URI string?

A

? - signifies the starting point for a series of requests query parameters in a URI string.

33
Q

What does the 504 status code message indicate?

A

Command sent to the server timed out or did not return in a timely fashion.

34
Q

What language does Ansible use to store configurations?

A

YAML

35
Q

What holds Ansible, Chef and Puppet’s script for management?

A

Ansible - Playbook
Chef - Recipe
Puppet - Manifest

36
Q

What is Chef’s bookshelf used for?

A

The bookshelf is where you would upload Chef’s cookbook.

  • This will allow the chef server to execute config. mgmt. contained in the cookbook.
37
Q

Custom Ansible modules must be written in what format

A

Custom Ansible modules must be JSON format.

38
Q

What does JSON code always start with?

A

JSON code always starts with a curly bracket { }

39
Q

DNA center will return REST based requests in what format?

A

JSON.

40
Q

What are some characteristics of REST based API’s?

A
  • Layered system.
  • Client server architecture.
  • Stateless operation.
  • Notation of whether each object is cachable.
  • Code on demand.
    REST API’s don’t have to use http.
41
Q

Give an example of a list

A

Routers - [“R1,”R2”, “R3”]

42
Q

What kind of design does the SDA underlay use?

A

The SDA uses routed access layer design.

43
Q

List characteristics of SDA’s router access layer design?

A
  • All switches act as layer 3 switches.
  • All Switches use IGP.
  • Links between switches act a layer 3 routed links.
  • No layer 2 - No need for STP
  • FHRP is no longer needed.
44
Q

List two roles of the Control Plane.

A
  • Finding the route so that it can be inserted into the routing table.
  • Learning MAC addys and placing them in the mac addy table.
45
Q

What is Version Control Software and what does it do?

A

Version Control Software is control software used with configuration monitoring.

  • VCS - tracks identity of each user who changes files and tracks the differences in files over time.
46
Q

What is TCAM and what is it’s function?

A

TCAM - Ternary content-addressable memory

When ASIC needs to perform a lookup on a switch it uses TCAM to store the equivalent of a mac addy table.

47
Q

What node tracks all endpoints in the fabric site and associates the endpoints to fabric nodes. It uses LISP to do this.

A

The Control node.

48
Q

What node is the gateway between SDA and external networks?

A

The Border node.

49
Q

What node routes and transports IP traffic inside the fabric - it doesn’t use vxlan?

A

Intermediate node.

50
Q

What node is located where endpoints register with the fabric.

A

Edge node.

51
Q

What are some benefits of Configuration Provisioning?

A
  • The flexibility to select which devices to configure or edit based on logic.
  • The capability to be notified if a change or modification was properly implemented.
  • Capability to revert changes if needed.
  • Capability to leverage variables and advance logic with templates to configure multiple devices with similar roles.
52
Q

When planning a Greenfield SDA design what design points must you consider?

A
  • Number of switchports needed in each switch.
  • Required speed of the switchports.
  • Benefits of switch stacks in each location.
  • Currently used cable length and types.
  • Requirement to suppor tpower to endpoint devices.
  • Current power available in each switch.
  • link capacity for links between switches.
53
Q

What is configuration drift?

A

Configuration drift is the change of a single device configuration overtime versus other devices that have the same role.

54
Q

What is IGP?

A

IGP - Interior Gateway Protocol.

  • Routing protocol used to exchange routing info within an autonomous system.
55
Q

What is EGP?

A

EGP - Exterior Gateway Protocol.

  • Used to determin network reachability between autonomous systems. makes use of IGP to resolve routes within an A.S.

CCNA COPY PLUS (34 decks)

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