33 Questions
What is the role of the controller in a software-defined network?
Placing all policies and routing logic in the network
Why are switches in a software-defined network considered 'blind'?
They need external instruction from the controller
What advantage does separating the control and data plane provide in SDN?
Freedom to customize logic independently
What is the main function of the SDN controller?
Instructing switches on packet forwarding
Why do SDN switches need instructions from the controller?
To know how to handle unknown packets
How does SDN differ from traditional networks in terms of switch functionality?
SDN switches depend on instructions from a central controller
What type of messages can be sent from the controller to the switch to get statistics details?
Flow stats
Which type of OpenFlow message can be sent from the switch to update the controller about flow rule removal?
Flow rule removal
In OpenFlow, how are flow entries grouped within switches?
By utilizing group messages
Which resource is stored in group tables inside switches as mentioned in the text?
Group messages
What are examples of asynchronous OpenFlow messages that can be sent from a switch to the controller?
Port up/down status and configuration apply fail error
Where can detailed information about OpenFlow specification version 1.5.1 be found?
What is the main objective of software-defined networking (SDN)?
Separating a network's control functions from its data forwarding functions
In the context of SDN, what role does the control plane serve?
Make decisions and act as an instructor for the network
How are traditional networking devices different from SDN in terms of control and data planes?
Traditional devices have control and data planes baked together, while SDN separates them
What is the major advantage of separating control and data planes in SDN?
Centralizing intelligence and abstracting architecture
How does SDN differ from traditional networking regarding the changeability of modules?
In traditional networking, modules are 'baked' in and unchangeable, while SDN allows flexibility
Why is standardization lacking in traditional networking devices compared to SDN?
Vendors in traditional networking have proprietary control over software and hardware choices
What type of message is exchanged between the controller and the switch to determine what features the switch supports?
OpenFlow Feature Request message
Which field in the OpenFlow messages is used to check connection aliveness?
Echo request and echo reply
In the context of OpenFlow messages, what is the purpose of negotiating OpenFlow version?
Agree on highest version supported
Which port is used for sending OpenFlow Feature Request messages from the controller to the switch?
Port 80
What is the purpose of OpenFlow messages for switch configurations (flow entries)?
Set up switch configurations based on applications
In OpenFlow, what type of message is exchanged between the controller and the switch once a TCP connection is made?
OpenFlow HELLO message
What is the responsibility of the processor in a router?
Construct the routing table based on the routing algorithm
In router architecture, what is the purpose of TCAM?
To implement high-speed route matching
What distinguishes Routing Information Base (RIB) from Forwarding Information Base (FIB)?
RIB is maintained at the control plane, FIB is maintained in interface TCAM hardware
What signifies a packet arrival in a router's control plane?
Route calculation
Which component is responsible for IP forwarding in a router?
Interface card
What generation of router architecture is characterized by distributed over multiple racks?
4th Generation
How does CAM differ from RAM in a router's architecture?
CAM queries data directly without needing an address like RAM
What role does FIB serve in a router's operations?
Maps input interfaces to output interfaces for packet forwarding
What is true about the Data Plane of a router?
'Data Plane implements forwarding functionalities'
Test your knowledge on IP Routers, the operations of routers, routing tables, and packet forwarding in computer networks and internet protocols. Explore concepts from the book 'Computer Networks and Internet Protocols' by Soumya K Ghosh and Sandip Chakraborty.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
