Computer Networks
Akopọ
Two computers on the same desk have nothing whatever to say to each other unless somebody has agreed, in advance and in enormous detail, how they will say it. What voltage means a 1. How big a chunk of data may be. What the receiver does if a chunk goes missing. How a machine on this side of the world is even addressed from the other. None of that is obvious, none of it is optional, and all of it is what a network protocol is for.
This lesson builds a network from the ground up. You will learn what a computer network is and what it costs as well as what it buys, the difference between a local and a wide area network, when to run a cable and when to go wireless, and how the star and bus topologies behave when something breaks. Then you will meet the protocols this specification names, the four layer model that organises them, and the four methods of network security you are expected to explain.
Awọn Afojusun
- Define what a computer network is. Discuss the benefits and risks of computer networks. Describe the LAN and WAN types of computer network:
- Local Area Network (LAN)
- Wide Area Network (WAN).
- Understand that networks can be wired or wireless.
- Discuss the benefits and risks of wireless networks as opposed to wired networks. Explain the following physical network topologies:
- star
- bus.
- Define the term ‘protocol’.
- Explain the purpose and use of common network protocols including:
- Ethernet
- Wi-Fi
- TCP (Transmission Control Protocol)
- UDP (User Datagram Protocol)
- IP (Internet Protocol)
- HTTP (Hypertext Transfer Protocol)
- HTTPS (Hypertext Transfer Protocol Secure)
- FTP (File Transfer Protocol)
- email protocols:
- SMTP (Simple Mail Transfer Protocol)
- IMAP (Internet Message Access Protocol). Understand the need for, and importance of, network security. Explain the following methods of network security:
- authentication
- encryption
- firewall
- MAC address filtering.
- Describe the 4 layer TCP/IP model:
- application layer
- transport layer
- network layer
- link layer.
- Understand that the HTTP, HTTPS, SMTP, IMAP and FTP protocols operate at the application layer. Understand that the TCP and UDP protocols operate at the transport layer.
- Understand that the IP protocol operates at the network layer.
Àwòrán ọpọlọ
A ti ṣe àwòrán kókó yìí kí o lè rí bí àwọn èrò ṣe so pọ̀.
Ṣí àwòrán ọpọlọ nínú áàpù
Akọ̀wé Ẹ̀kọ́
Àkọsílẹ̀ Ẹ̀kọ́ Pípé wà lórí Ohun Èlò Green Bridge
Gba ohun èlò Green Bridge CBT sórí fóònù tàbí kọ̀mpútà rẹ fún gbogbo ilé ìkàwé IGCSE: ìwé ìdánwò àtijọ́, ìlànà ìdíwọ̀n, àwòrán èrò, káàdì ìkẹ́kọ̀ọ́ àti ẹ̀kọ́ ohùn.
Ìdánwò Ẹ̀kọ́
Oriire fun ipari ẹkọ lori Computer Networks. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.
Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.
Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.
- Which of these best defines a protocol? A. A physical cable joining two devices B. A set of rules that determine how data is communicated between devices C. A program that displays web pages D. The shape in which a network is wired Answer: B
- At which layer of the four layer TCP/IP model does the IP protocol operate? A. Application B. Transport C. Network D. Link Answer: C
- In which topology does a single break in the shared cable stop the whole network working? A. Star B. Bus C. Both equally D. Neither Answer: B
- Which protocol is used for sending email? A. IMAP B. FTP C. SMTP D. HTTP Answer: C
- What does MAC address filtering do? A. Scrambles data so it cannot be read in transit B. Allows or blocks devices based on the physical address in their network adapter C. Checks a user's password when they log in D. Splits data into packets for transmission Answer: B
Ṣiṣẹ́ lórí àwọn ìbéèrè wọ̀nyí nínú ohun èlò náà
Ṣiṣẹ́ lórí àwọn ìbéèrè wọ̀nyí nínú ohun èlò náà
Awọn Iwe Itọsọna Ti a Gba Nimọran
Ṣe Adaṣe Awọn Ibeere Idanwo Adaṣe
Ṣe o fẹ ṣe adaṣe awọn ibeere idanwo adaṣe nipa Computer Networks? Ṣe igbasilẹ ohun elo Green Bridge CBT lati wọle si awọn ibeere idanwo adaṣe ati awọn ayẹwo adaṣe kikun fun koko-ọrọ yii.
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