{"id":189,"date":"2022-11-28T18:48:29","date_gmt":"2022-11-28T18:48:29","guid":{"rendered":"http:\/\/learnlearn.uk\/ibcs\/?page_id=189"},"modified":"2023-10-27T06:17:15","modified_gmt":"2023-10-27T06:17:15","slug":"data-packets","status":"publish","type":"page","link":"https:\/\/learnlearn.uk\/ibcs\/data-packets\/","title":{"rendered":"Data, Segments, Packets & Frames"},"content":{"rendered":"
\n

Data<\/h2>\n
\n\n

Data<\/h3>\n

\"\"<\/a><\/p>\n

When data is requested by a user or posted from a form, the raw data must first be prepared by the application. This may involved encoding and encrypting the data at this level, especially if end-to-end encryption has been used.<\/p>\n\n<\/div>

Segments<\/h2>\n
\n\n

Segments<\/h3>\n

\"\"<\/a><\/h3>\n

Transport Layer (Layer 4 of the OSI model)<\/em><\/p>\n

Segmentation is the process of breaking down data from the higher layers (e.g., application layer) into smaller, manageable units for transmission. These smaller units are called segments.<\/p>\n

In TCP (Transmission Control Protocol), data is divided into segments before being sent over the network. These segments contain sequence numbers and other control information.<\/p>\n

 <\/p>\n

 <\/p>\n\n<\/div>

Packets<\/h2>\n
\n\n

Packets<\/h3>\n

\"\"<\/a><\/h3>\n

Network Layer (Layer 3 of the OSI model)<\/em><\/p>\n

Packets are the data units used for communication between devices in a network. The network layer is responsible for routing packets from the source to the destination. Packets contain not only the data but also network layer addressing information.<\/p>\n

In IP (Internet Protocol) networks, data is encapsulated into packets. Each packet includes the source and destination IP addresses and other information for routing.<\/p>\n

 <\/p>\n\n<\/div>

Frames<\/h2>\n
\n\n

Frames<\/h3>\n

\"\"<\/a><\/h3>\n

Data Link Layer (Layer 2 of the OSI model)<\/p>\n

Frames are the data units used for communication within a local network segment. The data link layer is responsible for controlling access to the physical medium (e.g., Ethernet or Wi-Fi) and ensuring reliable transmission within a local network.<\/p>\n

In Ethernet networks, data is formatted into frames. Each frame includes source and destination MAC addresses, frame delimiters, and error-checking information like CRC (Cyclic Redundancy Check).<\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n\n<\/div>

Resources<\/h2>\n
\n\n

Resources<\/h3>\n

Teacher Presentation<\/a><\/p>\n

 <\/p>\n

 <\/p>\n<\/div><\/div>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Data When data is requested by a user or posted from a form, the raw data must first be prepared by the application. This may involved encoding and encrypting the data at this level, especially if end-to-end encryption has been used. Segments Transport Layer (Layer 4 of the OSI model) Segmentation is the process of… Read More »Data, Segments, Packets & Frames<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"off","neve_meta_content_width":70,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":""},"yoast_head":"\nData, Segments, Packets & Frames - IB Computer Science<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/learnlearn.uk\/ibcs\/data-packets\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Data, Segments, Packets & Frames - IB Computer Science\" \/>\n<meta property=\"og:description\" content=\"Data When data is requested by a user or posted from a form, the raw data must first be prepared by the application. 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