Computer Networks and Internet Protocols Quiz

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What is the role of the controller in a software-defined network?

Executing custom logic in the data plane

Placing all policies and routing logic in the network (correct)

Providing built-in features to the switches

Directing the hardware vendors to provide necessary components

Why are switches in a software-defined network considered 'blind'?

They automatically adapt to any network changes

They need external instruction from the controller (correct)

They can see all network traffic

They have no physical ports

What advantage does separating the control and data plane provide in SDN?

Reliance on vendor-provided features

Limited product lifespan

Decreased community development

Freedom to customize logic independently (correct)

What is the main function of the SDN controller?

Instructing switches on packet forwarding Signup and view all the answers

Why do SDN switches need instructions from the controller?

To know how to handle unknown packets Signup and view all the answers

How does SDN differ from traditional networks in terms of switch functionality?

SDN switches depend on instructions from a central controller Signup and view all the answers

What type of messages can be sent from the controller to the switch to get statistics details?

Flow stats Signup and view all the answers

Which type of OpenFlow message can be sent from the switch to update the controller about flow rule removal?

Flow rule removal Signup and view all the answers

In OpenFlow, how are flow entries grouped within switches?

By utilizing group messages Signup and view all the answers

Which resource is stored in group tables inside switches as mentioned in the text?

Group messages Signup and view all the answers

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 Signup and view all the answers

Where can detailed information about OpenFlow specification version 1.5.1 be found?

Signup and view all the answers

What is the main objective of software-defined networking (SDN)?

Separating a network's control functions from its data forwarding functions Signup and view all the answers

In the context of SDN, what role does the control plane serve?

Make decisions and act as an instructor for the network Signup and view all the answers

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 Signup and view all the answers

What is the major advantage of separating control and data planes in SDN?

Centralizing intelligence and abstracting architecture Signup and view all the answers

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 Signup and view all the answers

Why is standardization lacking in traditional networking devices compared to SDN?

Vendors in traditional networking have proprietary control over software and hardware choices Signup and view all the answers

What type of message is exchanged between the controller and the switch to determine what features the switch supports?

OpenFlow Feature Request message Signup and view all the answers

Which field in the OpenFlow messages is used to check connection aliveness?

Echo request and echo reply Signup and view all the answers

In the context of OpenFlow messages, what is the purpose of negotiating OpenFlow version?

Agree on highest version supported Signup and view all the answers

Which port is used for sending OpenFlow Feature Request messages from the controller to the switch?

Port 80 Signup and view all the answers

What is the purpose of OpenFlow messages for switch configurations (flow entries)?

Set up switch configurations based on applications Signup and view all the answers

In OpenFlow, what type of message is exchanged between the controller and the switch once a TCP connection is made?

OpenFlow HELLO message Signup and view all the answers

What is the responsibility of the processor in a router?

Construct the routing table based on the routing algorithm Signup and view all the answers

In router architecture, what is the purpose of TCAM?

To implement high-speed route matching Signup and view all the answers

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 Signup and view all the answers

What signifies a packet arrival in a router's control plane?

Route calculation Signup and view all the answers

Which component is responsible for IP forwarding in a router?

Interface card Signup and view all the answers

What generation of router architecture is characterized by distributed over multiple racks?

4th Generation Signup and view all the answers

How does CAM differ from RAM in a router's architecture?

CAM queries data directly without needing an address like RAM Signup and view all the answers

What role does FIB serve in a router's operations?

Maps input interfaces to output interfaces for packet forwarding Signup and view all the answers

What is true about the Data Plane of a router?

'Data Plane implements forwarding functionalities' Signup and view all the answers