This table shows the OSI model layers and the components that operate at each layer.
Application | Interface (API) | Application | HTTP, SMTP, etc. | Message | - | - | Wireshark |
Presentation | Formatting, Encryption, Compression | Application | HTTP, SMTP, etc. | Message | - | - | Wireshark |
Session | Authentication, Authorization | Application | HTTP, SMTP, etc. | Message | - | Gateway | NSLOOKUP, NBTSTAT, Wireshark |
Transport | Reliability | Transport | TCP, UDP | Segment (TCP), Datagram (UDP) | Port | Firewall | TELNET, NETSTAT, Wireshark |
Network | Addressing, Routing | Internet | IP, ICMP | Packet | IP Address | Router | IPCONFIG, PING, TRACERT, Wireshark |
Data Link | Logical Link Control, Media Access Control | Link | Ethernet, Wi-Fi, PPP, etc. | Frame | MAC Address | Switch, Bridge, Access Point | Lights on device, ARP, Wireshark |
Physical | Transmission | Link | CAT 5, RJ-45, etc. | Bit | - | Hub, NIC, Cable, Wireless | Lights on device |
One easy way to remember the OSI layer is to think:[source?]
A - All
P - People
S - Seem
T - To
N - Need
D - Data
P - Processing
Another popular acrostic to remember OSI layers names is (inferring
that it is required to attend classes to pass networking certification exams):
A - Away
P - Pizza
S - Sausage
T - Throw
N - Not
D - Do
P - Please
Suggestions from David Bombal (7 to 1):
A - All
P - People
S - Sleeping
T - Through
N - Networking
D - Don't
P - Pass
Going the opposite way (1-7):
P - Please
D - Do
N - Not
T - Teach
S - Students
P - Pointless
A - Acronyms
What devices operate at each OSI layer?
Network+/Standards/OSI Model/OSI Components.
Which devices operate at the OSI model Layer 1?
Examples of layer 1 devices include hubs, repeaters & Ethernet cable connectors. These are the basic devices that are used at the physical layer to transmit data through a given physical medium which is suitable as per the network need.
What devices operate at OSI model Layer 2?
Layer 2 Switch Operation
A Layer 2 switch is a device that operates according to the Layer 2 data communications protocol. A Layer 2 device decides how to forward data based on the MAC address. Ethernet hubs and network switches work at the data link layer, with a switch delivering greater performance than a hub.
Which device works at layer 3 of OSI model?
Routers operate at this layer—sending data throughout the extended network and making the Internet possible.