NPTEL Computer Networks And Internet Protocol Week 9 Assignment Answers 2025
1. What is the primary purpose of a routing table in a router?
a) To store user credentials
b) To log network traffic
c) To maintain information about the routes to various network destinations
d) To assign MAC addresses to devices
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2. What is the main disadvantage of using static routing?
a) High bandwidth usage
b) Inability to adapt to network topology changes
c) Complex configuration for small networks
d) Requires a routing protocol
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4. In the context of router architecture, what does “line card” refer to?
a) Component that connects routers to electrical power supplies.
b) A hardware module containing input and output ports.
c) A software routine for managing forwarding tables.
d) A routing protocol used to configure static routes.
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5. If a router receives a new routing update from a protocol like OSPF, where is this information first stored ?
a) In the FIB
b) In the MAC address table
c) In the RIB
d) In the ARP table
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6. Which of the following is not a core principle of Software-Defined Networking (SDN)?
a) Centralized control of the network through a controller
b) Dynamic configuration of network devices without manual intervention
c) Tight coupling of data plane and control plane
d) The ability to programmatically define network behavior
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7. Which of the following is a major benefit of OpenFlow in SDN?
a) OpenFlow does not allow network applications to run over the connected devices.
b) OpenFlow allows for granular control over the flow of packets.
c) OpenFlow is primarily used to monitor network security
d) OpenFlow increases network congestion by adding overhead
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8. Which of the following best describes the “Southbound API” in an SDN architecture?
a) It facilitates communication between the SDN controller and network applications.
b) It manages communication between the control plane and data plane, typically using protocols
like OpenFlow.
c) It connects the SDN controller with other controllers in a multi-controller setup.
d) It is used to monitor the health of the physical devices in the network.
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9. Which of the following is an example of a “Northbound API” in SDN?
a) OpenFlow
b) OVSDB
c) NETCONF
d) RESTful API
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10. In a multi-controller SDN setup, what mechanism is commonly used to ensure consistent state
across controllers?
a) Flow migration
b) Controller federation
c) Dynamic flow recalculatior
d) Multi-path routing
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