Member Avatar for ikojoruth

Am a novise in networking ,I want to know what OSI is.

Thank you.

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A short, practical follow-up to what asked and to the replies from and .

The OSI idea is best treated as a troubleshooting map rather than a protocol stack to install. correctly noted the layered view; mentioned TCP/IP — that is a real protocol suite that is implemented in the wild and is mapped onto the OSI idea only approximately. The useful part of the OSI concept is that it suggests where to look when something breaks.

Suggested troubleshooting checklist (work top-to-bottom when diagnosing a fresh connectivity problem):

Windows:
ipconfig /all
arp -a
tracert example.com
netstat -an

Linux/macOS:
ip addr show
ip link show
arp -n
traceroute -n example.com
ss -tulpn
sudo tcpdump -i eth0 -w capture.pcap

Common device roles and quick guidance: hubs are very low-level devices, switches operate at the link/forwarding plane and are useful to check MAC/ARP, routers handle IP/routing decisions, firewalls may block at packet or connection level (and can inspect higher-layer data in next‑gen products), and proxies act at the application layer. Use that mapping to choose tests: LED/cable checks first, then interface/address checks, then routing/traceroute, then ports/session checks, then packet capture and application inspection.

Reference materials and next steps: a concise conceptual reference is available from Cloudflare and packet-capture/troubleshooting guides from Wireshark. Keep in mind that OSI is a teaching tool; real deployments follow TCP/IP and vendor implementations, so mappings are approximate.

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Member Avatar for techbound

I believe its a method to transfer information across a network kind of like TCP/IP (Transmission Control Protocol/Internet Protocol). To take a look at your Network Connections under My Computer and then right click on one of your LAN or High Speed Internet connection. Dont change any setting but just take a look and you will see that your TCP/IP is grouped with Client for Microsoft Networks, Files and Printer Sharing for Microsoft Networks, QoS Packet Scheduler and TCP/IP.

Member Avatar for hammerhead

OSI model is representation of networking via seven layers namely.

Physical layer, Data link layer, network layer, transport layer, session layer, presentation layer and finally application layer. More info here

If you are interested in networking then it would be a good start to know about the various layers.

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