http2 - In which layer is HTTP in the OSI model? - Stack Overflow
HTTP is in the Application layer of the Internet protocol suite model and in the Session Layer of the OSI Model. The Session layer of the OSI Model is responsible for creating and managing sessions and is the first layer that passes data. HTTP can redirect sessions, reuse them and have persistent connections. answered Aug 5, 2021 at 18:39.
ip - Definition of Network Units: Fragment, Segment, Packet, …
Segments are in a Transport Layer. Frame:Similar to a Packet, frames are small parts of a message in the network. a frame is the unit of data used in the OSI model’s data link layer. Datagram:The datagram represents a data unit of transfer in networking. Data transmitted in a network is divided into smaller parts called datagrams. Transport ...
On what ISO/OSI layer does a hub operate? - Stack Overflow
2023年6月8日 · 1. Hub is usually term for L1 device. However, L2 switch is sometimes called switching hub. Common terms for devices facilitating connection of multiple networked nodes on layers 1, 2 and 3 are: L1 (physical): a hub. L2 (link): a switch. L3 (network): a router. answered Jun 8, 2023 at 8:59.
At what layer in the protocol stack does DNS happen?
2014年2月12日 · In OSI stack terms, DNS runs in parallel to HTTP in the Application Layer (layer 7). DNS is in effect an application that is invoked to help out the HTTP application, and therefore does not sit "below" HTTP in the OSI stack. DNS itself also makes use of UDP and more rarely TCP, both of which in turn use IP. answered Feb 11, 2014 at 12:00.
Which layer in the OSI model does a network scan work on?
2017年11月9日 · A port is a transport layer address; some of them may be used by services on the target ("open" ports), and others may be unused ("closed" ports). Nmap can scan 3 different transport layers protocols: TCP, UDP, and SCTP. The majority of inputs to OS detection come from here: TCP options, sequence number analysis, window size, etc.
What is the Main Job of Logical Link Layer in Layer 2
2017年12月26日 · An LLC header tells the Data Link layer what to do with a packet once a frame is received. It works like this: A host will receive a frame and look in the LLC header to find out where the packet is destined for - for example, the IP protocol at the Network layer or IPX. LLC also does ciphering and deciphering of SN-PDU (SNDCP)packets.
network programming - How does a packet travel from one …
2013年4月21日 · Layer 3 is the IP layer, which carries information about where in the whole network the packet is from and to, not just the current hop. The transmission would go like this: Machine A wants to send a packet to Machine B. Machine A knows Machine B's IP address, so it places that in the layer 3 packet.
In which OSI layer is the REST API paradigm? - Stack Overflow
2020年3月3日 · So, I'd think REST belongs to Layer 5 - Session Layer, which is commonly described as the layer where continuous exchange of information in the form of multiple back-and-forth transmissions between two nodes. It's hard to see how REST API could belong to the Layer 6 or Layer 7 of the OSI Model. The Presentation layer provides for negotiation of ...
Which OSI layer does WebSocket Protocol lay on?
2013年1月3日 · The Web sockets and HTTP should really be OSI#4 (transport layer) in my opinion, but it relies on a transport-layer protocol (TCP) itself. – John Dvorak. Jan 3, 2013 at 5:25. OSI#6 (presentation layer) should be responsible for data encryption, but wikipedia throws SSL/TLS into OSI#5 (session layer) because keeping a session what SSL also does.
OSI model - What's the presentation and session layer for?
The session layer is meant to store states between two connections, like what we use cookies for when working with web programming. The presentation layer is meant to convert between different formats. This was simpler when the only format that was worried about was character encoding, ie ASCII and EBCDIC. When you consider all of the different ...