Exam (elaborations)
CS6250 Exam 2/154 Accurate Questions with answers
- Course
- Institution
CS6250 Exam 2/154 Accurate Questions with answers
[Show more]
Seller
Follow
Victorious23
Reviews received
Content preview
CS6250 Exam 2/154 AccurateQuestions with answers
What is the control plane responsible for? - -Contains the logic that controls
the forwarding behaviors of routers such as routing protocols and network
middlebox
-What is the data plane responsible for? - -Performs the actual forwarding
as dictated by the control plane
-Why are the data plane and control plane separate? - -Enables us to use
higher-level software programs for control, making it easier to debug and
check the networks behavior
-What is forwarding? - -When a router receives a packet, it must determine
what output link to send it through
-What is routing? - -Determining the path from the sender to the receiver
across the network via routing algorithms
-Where are routing algorithms processed? - -Control plane
-Where are forwarding functions processed? - -Data plane
-What are the main components of an SDN network? - -Infrastructure,
controller, and network-control applications
-What is the SDN-controlled network (infrastructure) responsible for? - -
Forwarding of traffic in a network based on rules computed by the SDN
control plane
-What is the SDN controller responsible for? - -Acts as an interface between
the network elements and network-control applications
-What are network control applications responsible for? - -Programs that
manage the underlying network by collecting information about the network
elements
-In terms of the SDN architecture, what is flow-based forwarding? - -Rules
for forwarding packets can be computed based on any number of header
field values in various layers - Differs from the traditional approach where
only the destination IP determines the forwarding of a packet
, -What are the defining features of an SDN architecture - -Flow-based
forwarding, network control functions, programmable network
-What are network control functions? - -Two components: Controller and
network applications
Controller maintains up-to-date network state information about the network
devices and elements (ex. Hosts, switches, links) and provides it to network-
control applications
-What is a programmable network? - -The "brain" of the SDN control plane;
manages the network
-What plane is the SDN controller part of? - -Control plane
-What are the layers of the SDN controller? - -Communication, network-wide
state-management, interface to the network-control application
-In terms of the SDN controller, what does the communication layer do? - -
Consists of a protocol where the SDN controller and network controlled
elements communicate
-What is the nickname for the communication layer of the SDN controller? -
-Southbound interface
-In terms of the SDN controller, describe the network-wide state-
management layer - -The network-state that is maintained by the controllers
-In terms of SDN, describe the network-control application layer - -This is
how the SDN controller interacts with network-control applications
-What is another name for this layer? - -Northbound interface
-What is the different between conventional and SDN? - -Conventional
networks have tightly coupled data and control plane
Software defined networks decouple the control plane from physical
networking
-What things should all SDN core controllers provide? - -Topology, statistics,
notifications, device management, shortest path forwarding, security
mechanisms
-What is a centralized controller? - -Typically has a single entity that
manages all forwarding devices in the network (a single point of failure)
-What is a distributed controller? - -An entity that runs across multiple data
centers interconnected by a WAN
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Victorious23. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
78121 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now