Introduction to Network (Pt2) PDF

Introduction to Network (Pt2) Types of Wireless Networks Bluetooth is a low-power, shorter range wireless Wi-Fi transmitters and receivers technology that is intended to replace wired located within the smartphone connectivity for accessories such as speakers,...

Introduction to Network (Pt2) Types of Wireless Networks Bluetooth is a low-power, shorter range wireless Wi-Fi transmitters and receivers technology that is intended to replace wired located within the smartphone connectivity for accessories such as speakers, enable the phone to connect to local headphones, and microphone as well as connect a smartwatch to a smartphone. networks and the internet. Bluetooth uses Ultra High Frequency (UHF) that A hotspot is an area where Wi-Fi allows devices to communicate over short distances signals are available. simultaneously Types of Wireless Networks Near Field Communication (NFC) is a technology that enables data to The Global Positioning systems (GPS) uses satellites to transmit be exchanged by devices that are in very close proximity to each signals that cover the globe. The smartphone can receive these other, usually less than a few centimeters. signals and calculate the phone’s location to an accuracy of within 10 meters. NFC can be used to connect a smartphone and a payment system and uses electromagnetic fields to transmit data. Types of Wireless Networks Cellular or Mobile data is the technology that lets you connect wirelessly using cell towers that transmit and receive radio signals. While the modern-day use of cellular data is starting to lean more toward connecting to the internet, cellular network technology is the one that originally enables us to have calls or send texts wirelessly. Building a Home Network These ports connect to the internal switch portion of the router. All devices connected to the switch ports are on the same local network. Port connection to public or internet, Communication Protocols: Method Communication Protocols: Language Communication Protocols: Confirmation Communication Protocols Protocols are required for computers to properly communicate across the network. In both a wired and wireless environment, a local network is defined as an area where all hosts must "speak the same language", which, in computer terms means they must "share a common protocol". Networking protocols define many aspects of communication over the local network: Protocol Description Characteristics Message Format Message format depends on the type of message and the channel. Message Size The rule that govern the size of the piece communicated across the network is very strict. When a long message is sent, it may be necessary to break the message in smaller pieces for reliability purpose. Timing Timing determines the speed at which the bits are transmitted across the network. Encoding Message sent across the network will be into bits by the sending host. Each bit is encoded depending on the network media which the bits are transmitted. The destination host receive and decodes the signal to interpret the message Encapsulation The message transmitted on a network must include a header that contains addressing information that identifies the source and destination host; else, it cannot be delivered. Message Pattern Some messages requires an acknowledgement before the next message can be sent, this type of request/response pattern is a common aspect of many networking protocols. Assessment Assessment Assessment TRANSMISSION CONTROL PROTOCOL (TCP) VS USER DATAGRAM PROTOCOL (UDP) Source: saturnvpn.com TRANSMISSION CONTROL PROTOCOL (TCP) VS USER DATAGRAM PROTOCOL (UDP) Source: labbots.com TRANSMISSION CONTROL PROTOCOL (TCP) VS USER DATAGRAM PROTOCOL (UDP) Source: networkverge.com Sample Message Format Ref: oreilly.com Sample Message Format HTTP Message Format Ref: msatechnosoft.in Sample Message Format: HTTP Request Response Ref: ntu.edu.sg Ref: msatechnosoft.in Network Communication Model: OSI Media Network Cables Wi-fi Repeater Network Communication Model: OSI Network Interface Cards Switch Network Communication Model: OSI End-to-end delivery Use IP addresses scheme to achieve its goal Router Host/End Devices Network Communication Model: OSI User Ports (TCP and UDP) as addressing scheme Service to Service Network Communication Model: OSI Application Commands. Also known as Desktop Layer Translation of codes to a human readable interface Identifying User sessions The distinction of the 3 layers are vague and it was merged in other communication model Network Communication Model: OSI Source:ByteByteGo OSI and TCP IP Model Comparison Assessment Assessment Assessment Assessment Assessment Assessment Assessment Assessment