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GraphQLModeling/Architecture 2020. 3. 8. 14:41
1. Overview GraphQL is an open-source data query and manipulation language for APIs, and a runtime for fulfilling queries with existing data. It allows clients to define the structure of the data required, and the same structure of the data is returned from the server, therefore preventing excessively large amounts of data from being returned, but this has implications for how effective web cach..
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Representational state transfer (REST) APIModeling/Architecture 2020. 3. 8. 14:39
1. Overview Representational state transfer (REST) is a software architectural style that defines a set of constraints to be used for creating Web services. Web services that conform to the REST architectural style, called RESTful Web services, provide interoperability between computer systems on the Internet. RESTful Web services allow the requesting systems to access and manipulate textual rep..
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Transmission Control Protocol (TCP) and User Datagram Protocol (UDP)Web/Network 2020. 3. 7. 15:49
1. Overview TCP and UDP are the protocol of Transport Layer (L4) which allows multiple applications to use one network connection simultaneously. 2. TRANSMISSION CONTROL PROTOCOL (TCP) TCP is a connection-oriented protocol. Connection-orientation means that the communicating devices should establish a connection before transmitting data and should close the connection after transmitting the data..
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Transmission Types: Unicast, Multicast, Broadcast, and AnycastWeb/Network 2020. 3. 7. 10:00
1. Overview 2. Description 2.1 Unicast Unicast is the communication that there is only one receiver. This is one-to-one communication. If you have 100 recipient, you need to send 100 same messages. This will be bandwidth-intensive. 2.2 Multicast Multicast is the communication that there is one more receiver. Only the members of the multicast group receive the multicast traffic. If you use Multic..
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HUB, Switch, and RouterWeb/Network 2020. 3. 7. 09:52
1. Overview HUB SWITCH ROUTER HUB works in Physical Layer of OSI Model SWITCH works in Datalink Layer of OSI Model ROUTER works in Network Layer of OSI Model HUB is a broadcast device SWITCH is a multicast device ROUTER is a routing device used to create a route for transmitting data packets HUB sends data in the form of packets SWITCH sends data in the form of frames ROUTER sends data in the fo..
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Simplex, Half duplex, and Full duplexWeb/Network 2020. 3. 7. 09:51
1. Overview 2. Description 2.1 Simplex It's like a one-way street. 2.1.1 Usages garage door opener, baby monitor, wireless microphone, car key fob, Radio, TV station. 2.2 Half Duplex Half Duplex transmission is when signals travel in both directions, but one at a time. Both transmitter and receiver can send signals, but they must take turns. 2.2.1 Usages Walkie-talkie 2.3 Full Duplex Full Duplex..
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Dynamic Host Configuration Protocol (DHCP) ServerWeb/Network 2020. 3. 6. 20:56
1. Overview A DHCP Server is a network server that automatically provides and assigns IP addresses, default gateways and other network parameters to client devices. It relies on the standard protocol known as Dynamic Host Configuration Protocol or DHCP to respond to broadcast queries by clients. A DHCP server automatically sends the required network parameters for clients to properly communicate..
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Bridged, Network Address Translation (NAT), Host-only in Virtual MachineWeb/Network 2020. 3. 6. 20:48
1. Overview Virtual machines can communicate with each other on the host as well as other physical machines on the physical network. To do so, virtual machines need two virtual things: virtual Network Interface Card (vNICs) and virtual switches/bridges. A virtual switch is a logically defined layer-2 device that passes frames between nodes. Virtual NICs of VMs are connected to the virtual ports ..