Computer Science - 4CP0 PearsonEdexcel

Networks

Bayani Gaba-gaba

Almost nothing a computer does today happens in isolation. A phone checking the weather, a laptop backing up to the cloud, a till in a shop confirming a card payment: every one of these is a conversation between machines, carried out over a network according to rules both sides agree to follow. This lesson opens up how that conversation actually works.

You will compare network types and usage models, wired versus wireless connections, and how speed is measured, before going layer by layer through the protocols that get a message from one device to another: physical topologies, the four-layer TCP/IP model, packet switching, and the specific protocols behind the web, file transfer and email.

Manufura

Understand why computers are connected in a network
Understand the different types of networks (local area network (LAN), wide area network (WAN), personal area network (PAN)) and usage models (client-server, peer-to-peer)
Understand wired and wireless connectivity
Understand that network data speeds are measured in bits per second (Mbps, Gbps)
Understand the role of and need for network protocols (Ethernet, Wi-Fi, TCP/IP, HTTP, HTTPS, FTP, email (POP3, SMTP, IMAP))
Understand that data can be transmitted in packets using layered protocol stacks and the 4-layer TCP/IP model (application, transport, network, data link)
Understand characteristics of network topologies (bus, ring, star, mesh)
Understand the different mobile communication standards (3G, 4G and subsequent generations)

Takardar Darasi

A network is two or more devices connected together so they can communicate and share resources. Computers are networked for three overlapping reasons: to share hardware such as printers and storage, so an organisation buys fewer devices; to share data so people do not need to carry files between machines on removable media; and to communicate, from email to video calls to multiplayer games. A standalone computer can do none of this; the moment it needs another device's help, it needs a network.

Akwai a cikin manhajar Green Bridge

Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.

Cikakkiyar bayanan darasi tare da zane-zane

Mataimakiyar koyo da AI

Yi karatu ba tare da intanet ba, a kowane lokaci, a ko'ina

Zazzage manhajar wayar hannu Zazzage manhajar kwamfyuta

Akwai a Android, Windows, macOS, da Linux

Nazarin Darasi

Barka da kammala darasi akan Networks. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.

Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.

Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.

Which type of network connects a person's own nearby devices, such as a phone and a pair of wireless earbuds? A) LAN B) WAN C) PAN D) VPN Answer: C
Which network topology connects every device individually to a central switch? A) Bus B) Ring C) Star D) Mesh Answer: C
Which protocol is used to send an email from a client to a mail server? A) FTP B) SMTP C) HTTP D) IMAP Answer: B
In the TCP/IP model, which layer is responsible for adding source and destination IP addresses to data? A) Application B) Transport C) Network D) Data link Answer: C
Network data transfer speeds are typically measured in: A) Bytes per second B) Bits per second C) Hertz D) Packets per second Answer: B