CH3

Question 1

What are the 3 planes of traditional networking

Answer 1

management, control, data

Question 2

Has a global view of the network, and uses a common management protocol to configure the network infrastructure devices

Answer 2

SDN controller

Question 3

A network virtualization technology that leverages an encapsulation (similar to VLANs) to encapsulate Layer 2 Ethernet frames within UDP packets (over UDP port 4789, by default).

Answer 3

VXLAN

Question 4

The use of what protocol in VXLAN enables routers to apply hashing algorithms on the outer header to load balance network traffic.

Answer 4

UDP

Question 5

VXLAN uses a tag that represents a logical segment - what is the tag called.

Answer 5

VNID (VXLAN Network Identifier)

Question 6

The logical segment identified by a VNID is a what?

Answer 6

Layer 2 broadcast domain

Question 7

Segmentation that is application aware that takes place at the VM level regardless of VLAN or subnet.

Answer 7

Micro-segmentation

Question 8

In an SDN architecture, what type of API’s are used to communicate between the SDN controller and the switches and routers within the infrastructure?

Answer 8

Southbound

Question 9

These API’s (typically RESTful API’s) are used to communicate between the SDN controller and the services and applications running over the network.

Answer 9

Northbound API’s

Question 10

Technology that addresses the virtualization of layer 4 through 7 services such as load balancing and security capabilities(firewal features). Essentially, you can convert certain types of network appliances into VM’s.

Answer 10

Network Functions Virtualization

Question 11

An intent-based networking solution developed by Cisco that provides automation and assurance services across campus networks, WANs, and branch networks. It is based on an open and extensible platform and provides policy, automation, and analytics capabilities.

Answer 11

DNA (Cisco Digital Network Architecture)

Question 12

Cisco DNA group-based access control policy uses the scalable groups that were configured where?

Answer 12

Cisco ISE

Question 13

Application policies can be configured in Cisco DNA Center to provide what type of capabilities?

Answer 13

QoS

Question 14

Traffic copy policies in DNA center are used for what function?

Answer 14

ERSPAN

Question 15

DNA solution that allows you to get contextual visibility into network functions with historical, real-time, and predictive insights across users, devices, applications, and the network.

Answer 15

Cisco DNA Center Assurance Solution

Question 16

Northbound REST APIs that expose specific capabilities of the Cisco DNA center platform and provide policy-based abstraction of business intent, allowing you to focus on an outcome to achieve instead of struggling with the mechanisms that implement that outcome.

Answer 16

Intent APIs

Question 17

All REST request in Cisco DNA Center require what?

Answer 17

Authentication

Question 18

Part of the Cisco DNA Security solution, this allows you to detect security threats in encrypted traffic without decrypting the packets. It is able to do this using machine learning and other capabilities.

Answer 18

ETA (Encrypted Traffic Analysis)

Question 19

To use ETA, you need Cisco Stealthwatch Enterprise along with one of the following network devices:

Answer 19

Catalyst 9000, ASR 1000, ISR 4000, CSR 1000V, ISR 1000, Catalyst 9800 WLC

Question 20

A platform created by Cisco that has numerous resources for network and application developers. It includes many tutorials, free video courses, sandboxes, learning paths, and sample code to interact with many APIs.

Answer 20

DevNet

Question 21

What are the 3 methods/technologies behind modern API’s.

Answer 21

SOAP (Simple Object Access Protocol), REST (Representational State Transfer), GraphQL and queryable APIs.

Question 22

An API contract language used in many networking devices. You can use this to write a specification for what the interface between a client and networking device should be on a particular topic.

Answer 22

YANG

Question 23

Invented to overcome the challenges in legacy SNMP implementations.

Answer 23

NETCONF

Question 24

What is a REST based variant of NETCONF?

Answer 24

RESTCONF

Question 25

What is a major difference between RESTCONF and NETCONF

Answer 25

RESTCONF requires the server to keep some client state.