# Introduction to Networking

In this course we’ll cover the basics of networking.​ We’ll start with what is a network and why it’s needed. ​we’ll describe the network components and provide the requirements for a networking solution, especially in highly demanding environments.​ \
Lastly, we’ll introduce the OSI model and the TCP/IP protocol suite and their role in networking.​

After each chapter, there is a "Check Your Knowledge" quiz. At the end of the course, there is a course completion quiz. 

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\[ <https://academy.nvidia.com/en/> ]&#x20;

For any question, please contact:[ academy-support@nvidia.com](mailto:%20academy-support@nvidia.com)\
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Introduction to Networking

1/ Provide the mechanism used to implement each TCP characteristic listed below.

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\--> Connection-oriented : Window size
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\--> Data loss recovery : Retransmits
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\--> Ordered delivery : Sequencing
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\--> Flow control : 3 way handshake
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...

2/ The Ethernet interface shown here receives a 2000 byte Ethernet frame. How is this handled?

user\@node:\~$ ifconfig
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eth0      Link encap:Ethernet HWaddr 00:10:57:C0:09:18
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          inet addr:10.8.44.21 Bcast:10.8.255.255 Mask:255.255.0.0
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          EtherTalk Phase 2 addr:65280/25
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          UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
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          RX packets:17291 errors:0 dropped:0 overruns:0 frame:0
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          TX packets:706 errors:0 dropped:0 overruns:0 carrier:0
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          collisions:11 <br>

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x It is handed over to the upper layer protocol to process.
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x It is fragmented into smaller frames where each fits the MTU size.
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.....
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3/ In the following example, Host A sends an initial frame to Host B. What does the switch do first?
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\--> It will add address 00:0a:8a:47.e6:12 to the switching table​

.....
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4/ ​In a layer-2 data center design how can you achieve multipath support?
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\--> You can configure an MSTP instance for each VLAN group.
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.....

5/ In which two ways does TCP use sequence numbers in a segment?
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x To determine if the packet changed during transit.​
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x To limit the number of segments that can be sent out of an interface at one time.​
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\--> To identify missing segments at the destination.
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x To specify the order in which the segments travel from source to destination.​

....
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6/ What is the primary purpose of flow control in the Transmission Control Protocol (TCP)?
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\--> To prevent a fast sender from overwhelming a slow receiver.
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....
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7/ What is the primary role of a network interface card (NIC) in a computer?
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x To regulating the temperature of the end node.
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x To make decisions as to where the traffic should be forwarded.
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....
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8/ What is the purpose of data encapsulation in a networking environment?
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\--> To add relevant information at each layer to facilitate communication.
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....
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9/ Which of the following best describes the purpose of the TCP/IP suite?
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\--> To facilitate end-to-end data communication over a network.
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....
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10/ Which three statements best characterize the transport layer protocols?
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x UDP uses windowing and acknowledgements for reliable transfer of data.​
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x TCP uses port numbers to provide reliable transportation of IP packets.​


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