Question 1

SDN can ________.
A)permit routing rules to be changed rapidly
B)reduces router costs
C)both A and B
D)neither A nor B

Accepted Answer

SDN (Software-defined networking) allows routing rules to be changed rapidly through centralized management, reducing the need for expensive hardware routers, and thereby reducing router costs. So, both options A and B are correct.

Question 2

The highest layer in SDN consists of ________.
A)switches
B)routers
C)the SDN controller
D)SDN applications

Accepted Answer

The highest layer in SDN is the SDN applications layer, which is where software applications are built and run on top of the SDN infrastructure. These applications can perform a variety of tasks such as traffic monitoring, security, and network management.

Question 3

Control functions are located in routers in ________.
A)traditional routing
B)SDN
C)both A and B
D)neither A nor B

Accepted Answer

In traditional routing, control functions are located within the routers themselves, whereas in SDN (Software-Defined Networking), control functions are centralized and separated from the routers.

Question 4

WAN optimization devices are deployed ________.
A)at the ends of leased lines
B)by the telephone carrier
C)by the PSDN carrier
D)by the ISP

Accepted Answer

WAN optimization devices are typically deployed at the ends of leased lines in order to improve the efficiency and performance of data transmissions over the WAN. They are not deployed by telephone or PSDN carriers, and while ISPs may offer WAN optimization services, they do not typically deploy WAN optimization devices themselves.

Question 5

WAN optimization provides ________.
A)network protocol acceleration
B)caching
C)both A and B
D)neither A nor B

Accepted Answer

WAN optimization provides both network protocol acceleration and caching. Network protocol acceleration improves the performance of the network by reducing the amount of data transmitted over the network, which in turn reduces the overall latency. Caching, on the other hand, stores frequently accessed data on a local server, which reduces the amount of data that needs to be transmitted over the WAN, improving performance. Therefore, both options A and B are correct.

Question 6

SDN ________.
A)reduces CapEx
B)increases OPEx
C)both A and B
D)neither A nor B

Accepted Answer

SDN (Software-Defined Networking) reduces CapEx (Capital Expenditure) by providing virtualization of network functions and decoupling hardware from software, which means that the network can be managed with less physical equipment. However, it may increase OPEx (Operational Expenditure) as there is a need for skilled IT personnel to manage and maintain the software-defined network.

Question 7

Traffic shaping ________.
A)limits the amount of some types of traffic
B)does not admit some types of traffic
C)both A and B
D)neither A nor B

Accepted Answer

Traffic shaping is a technique to optimize network performance by regulating the flow of network traffic. It can limit the amount of some types of traffic and may also block or prioritize certain types of traffic, therefore both options A and B are correct.

Question 8

Forwarding functions are located in routers in ________.
A)traditional routing
B)SDN
C)both A and B
D)neither A nor B

Accepted Answer

Forwarding functions are located in routers in both traditional routing and SDN. In traditional routing, forwarding functions are implemented through hardware and software within the router itself. In SDN, forwarding functions are separated from the control plane and implemented in network switches, but the switches are still considered to be part of the routing infrastructure.

Question 9

OpenFlow can be used to standardize ________.
A)northbound APIs
B)southbound APIs
C)both A and B
D)neither A nor B

Accepted Answer

OpenFlow is a protocol used to standardize southbound APIs, which are used for communication between the control plane and the data plane in a network.

Question 10

Communication between SDN applications and SDN controllers is governed by ________.
A)northbound APIs
B)southbound APIs
C)both A and B
D)neither A nor B

Accepted Answer

Communication between SDN applications and SDN controllers is governed by northbound APIs. Southbound APIs are used for communication between the controller and the network devices.

Question 11

The creation of routing tables for a router is an example of ________.
A)forwarding
B)control
C)both A and B
D)neither A nor B

Accepted Answer

Routing tables are part of the control plane, which is responsible for determining the path data packets take through a network.

Question 12

In caching,________.
A)a message may not have to be transmitted
B)messages are cached at the transmitting end of the line
C)both A and B
D)neither A nor B

Accepted Answer

Caching involves storing frequently accessed data closer to the user, which reduces the need to retrieve that data from a remote server. This means that messages may not have to be transmitted as they can be retrieved from the cache. Messages are not necessarily cached at the transmitting end of the line but can be cached at any point along the line where caching is implemented. Therefore, option A is the best choice.

Question 13

In SDN,a switch receives its forwarding table rules directly from ________.
A)the SDN controller
B)an SDN management application
C)another switch
D)an SNMP manager

Accepted Answer

In SDN, the switch receives its forwarding table rules directly from the SDN controller.

Question 14

A router's load-balancing process is determined by ________.
A)the SDN controller
B)an SDN application
C)the router
D)any of the above

Accepted Answer

The answer of A router's load-balancing process is determined by...

Quiz 10: Carrier Wide Area Networks Wans

SDN can ________.

The highest layer in SDN consists of ________.

Control functions are located in routers in ________.

WAN optimization devices are deployed ________.

WAN optimization provides ________.

SDN ________.

Traffic shaping ________.

Forwarding functions are located in routers in ________.

OpenFlow can be used to standardize ________.

Communication between SDN applications and SDN controllers is governed by ________.

The creation of routing tables for a router is an example of ________.

In caching,________.

In SDN,a switch receives its forwarding table rules directly from ________.

A router's load-balancing process is determined by ________.