What is the layer 3 protocol?
Network layer, layer 3. The most significant protocol at layer 3 (also called the network layer) is the Internet Protocol, or IP. IP is the standard for routing packets across interconnected networks–hence, the name internet. It is an encapsulating protocol similar to the way Ethernet is an encapsulating protocol.
What protocols are used in each layer of OSI model?
TCP/IP Protocol Architecture Model
OSI Ref. Layer No. | OSI Layer Equivalent | TCP/IP Protocol Examples |
---|---|---|
5,6,7 | Application, session, presentation | NFS, NIS+, DNS, telnet , ftp , rlogin , rsh , rcp , RIP, RDISC, SNMP, and others |
4 | Transport | TCP, UDP |
3 | Network | IP, ARP, ICMP |
2 | Data link | PPP, IEEE 802.2 |
What are the three primary characteristics of Layer 3?
The features of a layer 3 switch are:
- Comes with 24 Ethernet ports, but no WAN interface.
- Acts as a switch to connect devices within the same subnet.
- Switching algorithm is simple and is the same for most routed protocols.
- Performs on two OSI layers — layer 2 and layer 3.
Which network protocol works on layer 3 network layer of the OSI model?
Some common protocols which work at the Network layer are: IP, DHCP, ICMP, IGRP, EIGRP, RIP, RIP2, MARS. As mentioned above, the Internet Protocol works on this layer.
What is the primary function of layer 3 device?
Layer 3 provides switching and routing technologies, creating logical paths, known as virtual circuits, for transmitting data from node to node. Routing and forwarding are functions of this layer, as well as addressing, internetworking, error handling, congestion control and packet sequencing.
What are the functions of the transport layer?
The main role of the transport layer is to provide the communication services directly to the application processes running on different hosts. The transport layer provides a logical communication between application processes running on different hosts.
What are layer protocols?
A protocol is a set of rules and conventions that describe how information is to be exchanged between two entities. Networking tasks often require more than one protocol to perform a task, such as file transfer. A set of protocols layered in this way is called a protocol stack. …
What is the purpose of the last 3 layers in OSI model?
Layer 3 of the OSI Model: Network Layer provides the functional and procedural means of transferring variable length data sequences from a source host on one network to a destination host on a different network, while maintaining the quality of service requested by the transport layer (in contrast to the data link …
What are the functions of network layer in OSI model?
The network layer has two main functions. One is breaking up segments into network packets, and reassembling the packets on the receiving end. The other is routing packets by discovering the best path across a physical network.
What are two functions of a Layer 2 switch?
Switch functions at layer 2
- Learning – The switch learns the MAC address of the device on the switch port on which it receives the frame.
- Forwarding – The switch does 2 types of message forwarding:
Which OSI layer is responsible for determining which route through the network to use?
The Layer 3, or Network Layer, is responsible for finding the right path for the data packet to reach its destination based on Logical Addresses (means addresses not really present on the network node).