CS6250 COMPUTER NETWORK EXAM 2 (ACTUAL)
LATEST 2024 WITH 200+ EXPERT CERTIFIED
QUESTIONS AND ANSWERS I ALREADY GRADED A+
What are the main components of a router?
<<<aNSWERS>>>-Input/Output ports
-The switching fabric
-The routing processor
What is the main purpose of southbound interfaces?
<<<aNSWERS>>>Separating medium between the control
plane and data plane functionality
What are three information sources provided by OpenFlow
protocol? <<<aNSWERS>>>1. Event-based messages that
are snet by forward devices to controller when there is a link
or port change
2. flow statistics are generated by forwarding devices and
collected by controller
3. Packet messages are sent by forwarding devices to
controller when they do not know what to do with a new
incoming flow
,What are the core functions of the SDN controller?
<<<aNSWERS>>>Network service functions such as
topology, statistics, notifications, device management,
shortest path forwarding and security mechanisms
What are the differences between centralized and distributed
architectures of SDN controllers? <<<aNSWERS>>>Single
entity manages all devices in the network
In the distributed version, its a centralized cluster of nodes or
physical set of elements
When would you want a distributed controller over a
centralized one? <<<aNSWERS>>>If you want to scale your
network and want better fault tolerance
Describe the purpose of each component of ONOS in a SDN
control platform <<<aNSWERS>>>Serves as the master
openflow controller for a group of switches
??? weird question
How does ONOS achieve fault tolerance?
<<<aNSWERS>>>ONOS redistributes the work of a failed
instance to other remaining instances. Each switch in the
network is connected to multiple ONOS instances with one
being a master
, What is P4? <<<aNSWERS>>>High level programming to
configure switches which works in conjunction with SDN
control protocols
What are the primary goals of P4?
<<<aNSWERS>>>Reconfigurability - The way parsing and
processing of packets takes place in the switches should be
modified by the controller
Protocol Independence - To enable the switches to be
independnt of any particular protol, the contorller defines a
packet parser and set of tables
Target Independence - packet processing programs shuold be
programmed independent of underlying target devices
What are the two main operations of P4 Forwarding Model?
<<<aNSWERS>>>Configure - These sets of operations are
used to program the parser. They specify the header fields to
be processed in each match+action stage
Populate: The entries in the match + action tables specified
during configuration may be altered using the populate
operations
What are the applications of SDN? <<<aNSWERS>>>1.
Traffic Engineering -
LATEST 2024 WITH 200+ EXPERT CERTIFIED
QUESTIONS AND ANSWERS I ALREADY GRADED A+
What are the main components of a router?
<<<aNSWERS>>>-Input/Output ports
-The switching fabric
-The routing processor
What is the main purpose of southbound interfaces?
<<<aNSWERS>>>Separating medium between the control
plane and data plane functionality
What are three information sources provided by OpenFlow
protocol? <<<aNSWERS>>>1. Event-based messages that
are snet by forward devices to controller when there is a link
or port change
2. flow statistics are generated by forwarding devices and
collected by controller
3. Packet messages are sent by forwarding devices to
controller when they do not know what to do with a new
incoming flow
,What are the core functions of the SDN controller?
<<<aNSWERS>>>Network service functions such as
topology, statistics, notifications, device management,
shortest path forwarding and security mechanisms
What are the differences between centralized and distributed
architectures of SDN controllers? <<<aNSWERS>>>Single
entity manages all devices in the network
In the distributed version, its a centralized cluster of nodes or
physical set of elements
When would you want a distributed controller over a
centralized one? <<<aNSWERS>>>If you want to scale your
network and want better fault tolerance
Describe the purpose of each component of ONOS in a SDN
control platform <<<aNSWERS>>>Serves as the master
openflow controller for a group of switches
??? weird question
How does ONOS achieve fault tolerance?
<<<aNSWERS>>>ONOS redistributes the work of a failed
instance to other remaining instances. Each switch in the
network is connected to multiple ONOS instances with one
being a master
, What is P4? <<<aNSWERS>>>High level programming to
configure switches which works in conjunction with SDN
control protocols
What are the primary goals of P4?
<<<aNSWERS>>>Reconfigurability - The way parsing and
processing of packets takes place in the switches should be
modified by the controller
Protocol Independence - To enable the switches to be
independnt of any particular protol, the contorller defines a
packet parser and set of tables
Target Independence - packet processing programs shuold be
programmed independent of underlying target devices
What are the two main operations of P4 Forwarding Model?
<<<aNSWERS>>>Configure - These sets of operations are
used to program the parser. They specify the header fields to
be processed in each match+action stage
Populate: The entries in the match + action tables specified
during configuration may be altered using the populate
operations
What are the applications of SDN? <<<aNSWERS>>>1.
Traffic Engineering -
