CH3 Flashcards
What are the 3 planes of traditional networking
management, control, data
Has a global view of the network, and uses a common management protocol to configure the network infrastructure devices
SDN controller
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).
VXLAN
The use of what protocol in VXLAN enables routers to apply hashing algorithms on the outer header to load balance network traffic.
UDP
VXLAN uses a tag that represents a logical segment - what is the tag called.
VNID (VXLAN Network Identifier)
The logical segment identified by a VNID is a what?
Layer 2 broadcast domain
Segmentation that is application aware that takes place at the VM level regardless of VLAN or subnet.
Micro-segmentation
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?
Southbound
These API’s (typically RESTful API’s) are used to communicate between the SDN controller and the services and applications running over the network.
Northbound API’s
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.
Network Functions Virtualization
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.
DNA (Cisco Digital Network Architecture)
Cisco DNA group-based access control policy uses the scalable groups that were configured where?
Cisco ISE
Application policies can be configured in Cisco DNA Center to provide what type of capabilities?
QoS
Traffic copy policies in DNA center are used for what function?
ERSPAN
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.
Cisco DNA Center Assurance Solution
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.
Intent APIs
All REST request in Cisco DNA Center require what?
Authentication
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.
ETA (Encrypted Traffic Analysis)
To use ETA, you need Cisco Stealthwatch Enterprise along with one of the following network devices:
Catalyst 9000, ASR 1000, ISR 4000, CSR 1000V, ISR 1000, Catalyst 9800 WLC
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.
DevNet
What are the 3 methods/technologies behind modern API’s.
SOAP (Simple Object Access Protocol), REST (Representational State Transfer), GraphQL and queryable APIs.
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.
YANG
Invented to overcome the challenges in legacy SNMP implementations.
NETCONF
What is a REST based variant of NETCONF?
RESTCONF
What is a major difference between RESTCONF and NETCONF
RESTCONF requires the server to keep some client state.
