Osi model devices by layer

This table shows the OSI model layers and the components that operate at each layer.

Table of Contents Show

What devices operate at each OSI layer?
Which devices operate at the OSI model Layer 1?
What devices operate at OSI model Layer 2?
Which device works at layer 3 of OSI model?

OSI Layer	Purpose	TCP/IP Layer	Protocol	Packet Data Unit	Address	Device	Troubleshoot
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.