CCNA Last Minute Cram Flashcards
List four types of machine learning (ML).
Reinforcement learning - action/reward
Supervised learning - labeled data set (cats/dogs)
Unsupervised learning - unlabeled data
Deep learning - neural networks
True or false: you can use encapsulation dot1q <vlan> native on a router physical interface.</vlan>
false - you’d just configure the IP address on the physical interface, OR specify the native vlan on a subinterface with its own IP address
True or false: even though you configure DHCP snooping globally on a switch, you still need to enable it per-VLAN as well.
True
What management tools use a procedural approach and what does that mean?
Ansible and Chef. Procedural means step-by-step instructions. Ansible uses YAML, Chef uses a Ruby-based DSL.
Which management tools use a declarative approach?
Terraform and Puppet. You tell it your desired end-state, and they make it happen.
If two devices have a duplex mismatch, what interface errors would you see on the half-duplex side?
Collisions and late collisions
If two devices have a duplex mismatch, what interface errors would you see on the full-duplex side?
CRC errors and runts
What is the default OSPF reference bandwidth?
100 Mbps
You learned a great mnemonic for syslog alert levels.
Emily Always Calls Eric When Network Is Down
True or false: in JSON, anything within curly brackets is an object.
True
What are two types of SNMP notifications?
Trap and Inform
In addition to the DHCP snooping table, DAI can rely on what other manually-configured method to inspect packets?
ARP ACLs
WLAN QoS level Platinum is best suited for…
voice
WLAN QoS level Gold is best suited for…
video
What WLAN QoS level is “best effort”?
Silver
What WLAN QoS level is for “background” traffic?
Bronze
Match the following:
NETCONF SSH
RESTCONF HTTP/S
That’s it - NETCONF uses SSH, RESTCONF uses HTTP/S
Between RESTCONF and NETCONF, which is stateful and which is stateless?
RESTCONF = stateless; NETCONF = stateful
What markup language does NETCONF use?
XML
What markup languages does RESTCONF use?
XML and JSON
List some facts about Ansible:
- connection protocol?
- markup language?
- push/pull?
- agent usage?
- SSH
- YAML
- Push
- agentless
List some facts about Terraform:
- which API does it use?
- agent usage?
- Restconf (XML/JSON)
- agentless
What do Chef, Puppet, and Ansible have in common?
They are all configuration tools
Why is Terraform different from Chef/Puppet/Ansible?
It is a provisioning tool, not a configuration tool
Are Chef and Ansible procedural or declarative?
procedural
Are Terraform and Puppet procedural or declarative?
declarative
Do Chef and Puppet use agents?
Yes
Do Ansible and Terraform use agents?
No
True or false: Puppet and Chef use a pull model.
True
A VTP server will update its VLAN list if…
the update it receives is of a higher revision number
To support extended VLANs, which version of VTP must be running?
version 3
What are the two basic commands required to configure DHCP snooping?
ip dhcp snooping
ip dhcp snooping vlan (number)
What is the command to configure DAI?
(config)# ip arp inspection vlan (number)
What are the three SDN architecture layers?
Application, Control, Infrastructure
What two components make up the “fabric” in SDN, and in which part of the architecture does the fabric reside?
overlay (virtual network) and underlay (physical network); it resides in the infrastructure layer
What is Machine Reasoning Engine (MRE)?
a feature of Catalyst Center which automates network troubleshooting
What is AI Endpoint Analytics?
a feature of Catalyst Center which analyzes endpoint behavior with a goal of optimizing security and performance of end devices
What is AI Enhanced RRM?
Radio Resource Management, a feature of Catalyst Center which optimizes radio resources
SNMP messages from an agent to a manager are sent on port _____, while messages sent from a manager to an agent are sent on port _____.
UDP 162 (trap, inform), UDP 161 (get, set)
