Computer Networks
Gbogbo ọrọ náà
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.
Ebumnobi
- 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.
Maapụ uche
E seela isiokwu a ka ị hụ otu echiche si ejikọta.
Mepee maapụ uche na ngwa
Akwụkwọ Ọmụmụ
Ndetu Nkuzi Zuru Ezu di na Ngwa Green Bridge
Nweta ngwa Green Bridge CBT na ekwenti gi ma o bu kompiuta maka ulo akwukwo IGCSE zuru oke: akwukwo ule ndi gara aga, usoro nyocha, eserese uche, kaadi omumu na nkuzi olu.
Nnyocha Ọmụmụ
Ekele diri gi maka imecha ihe karịrị na Computer Networks. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- 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
Rue ajuju ndi a n'ime ngwa ahu
Rue ajuju ndi a n'ime ngwa ahu
Akwụkwọ A Na-atụ Aro
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Computer Networks? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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