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CS6250 Exam 2 - Lesson 7
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CS6250 Exam 2 - Lesson 7
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CS6250 Exam 2 - Lesson 7control - -The _____ plane contains the logic that controls the forwarding
behavior of routers such as routing protocols and network middlebox
configurations.
-data - -The _____ plane performs the actual forwarding as dictated by the
control plane. For example, IP forwarding and Layer 2 switching are functions
of the data plane.
-forwarding - -The data plane performs the actual ______ as dictated by the
control plane. For example, IP forwarding and Layer 2 switching are functions
of the data plane.
-controls - -The control plane contains the logic that _____ the forwarding
behavior of routers such as routing protocols and network middlebox
configurations.
-contains the logic - -The control plane _______ that controls the forwarding
behavior of routers such as routing protocols and network middlebox
configurations.
-separation - -The two reasons for _____ of the control and data planes are
independent evolution and development and control from high-level software
program.
-independent evolution and development - -The two reasons for separation
of the control and data planes are ________ and control from high-level
software program.
-control - -The two reasons for separation of the control and data planes are
independent evolution and development and ______ from high-level software
program.
-decoupling - -The ______ of functions makes debugging and checking the
behavior of the network easier.
-independent - -The software aspect of the network can evolve _______ of
the hardware aspect. Since both control and forwarding behavior are
separate, this enables us to use higher-level software programs for control.
-data centers - -Consider large ______ with thousands of servers and VMs.
Management of such large network is not easy. SDN helps to make network
management easier. In this case, separation leads to opportunities in _____.
, -routing - -The interdomain ______ protocol used today, BGP, constrains
routes. There are limited controls over inbound and outbound traffic. There is
a set procedure that needs to be followed for route selection. Additionally, it
is hard to make routing decisions using multiple criteria. With SDN, it is
easier to update the router's state, and SDN can provide more control over
path selection. In this case, separation leads to opportunities in ______.
-enterprise networks - -SDN can improve the security applications for
______. For example, using SDN it is easier to protect a network from
volumetric attacks such as DDoS, if we drop the attack traffic at strategic
locations of the network. In this case, separation leads to opportunities in
_____.
-research networks - -SDN allows _____ to coexist with production networks.
In this case, separation leads to opportunities in _______.
-forwarding, routing - -The two important functions of the network layer are
______ and ______.
-forwarding - -When a router receives a packet at its input link, it must
determine which output link that packet should be sent through. This process
is called ______.
-forwarding - -______ is a function of the data plane.
-data plane - -Forwarding is a function of the _______.
-routers - -Since forwarding is a local function for ______, it usually takes
place in nanoseconds and is implemented in the hardware itself.
-hardware - -Since forwarding is a local function for routers, it usually takes
place in nanoseconds and is implemented in the _______ itself.
-header - -A router looks at the ______ of an incoming packet and consults
the forwarding table, to determine the outgoing link to send the packet to.
-forwarding table - -A router looks at the header of an incoming packet and
consults the _____, to determine the outgoing link to send the packet to.
-Routing - -_______ involves determining the path from the sender to the
receiver across the network. They rely on routing algorithms for this purpose.
-Routing - -_____ is an end-to-end process for networks.
-control plane - -Routing is a function of the _______ and it is implemented in
the software.
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