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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Introduction to Networking
1/ Provide the mechanism used to implement each TCP characteristic listed below.
--> Connection-oriented : Window size --> Data loss recovery : Retransmits --> Ordered delivery : Sequencing --> Flow control : 3 way handshake ...
2/ The Ethernet interface shown here receives a 2000 byte Ethernet frame. How is this handled?
user@node:~$ ifconfig eth0 Link encap:Ethernet HWaddr 00:10:57:C0:09:18 inet addr:10.8.44.21 Bcast:10.8.255.255 Mask:255.255.0.0 EtherTalk Phase 2 addr:65280/25 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:17291 errors:0 dropped:0 overruns:0 frame:0 TX packets:706 errors:0 dropped:0 overruns:0 carrier:0 collisions:11
x It is handed over to the upper layer protocol to process. x It is fragmented into smaller frames where each fits the MTU size. ..... 3/ In the following example, Host A sends an initial frame to Host B. What does the switch do first? --> It will add address 00:0a:8a:47.e6:12 to the switching table
..... 4/ In a layer-2 data center design how can you achieve multipath support? --> You can configure an MSTP instance for each VLAN group. .....
5/ In which two ways does TCP use sequence numbers in a segment? x To determine if the packet changed during transit. x To limit the number of segments that can be sent out of an interface at one time. --> To identify missing segments at the destination. x To specify the order in which the segments travel from source to destination.
.... 6/ What is the primary purpose of flow control in the Transmission Control Protocol (TCP)? --> To prevent a fast sender from overwhelming a slow receiver. .... 7/ What is the primary role of a network interface card (NIC) in a computer? x To regulating the temperature of the end node. x To make decisions as to where the traffic should be forwarded. .... 8/ What is the purpose of data encapsulation in a networking environment? --> To add relevant information at each layer to facilitate communication. .... 9/ Which of the following best describes the purpose of the TCP/IP suite? --> To facilitate end-to-end data communication over a network. .... 10/ Which three statements best characterize the transport layer protocols? x UDP uses windowing and acknowledgements for reliable transfer of data. x TCP uses port numbers to provide reliable transportation of IP packets.
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