Lecture2 Network Interface Layer Final Pdf Ethernet The network layer is responsible for routing packets from source to destination. a routing algorithm is software that decides where a packet goes next (for example, which node on which output line or broadcast channel). Definitions service: a particular networking function (e.g. reliable message delivery) protocol: an implementation of a service (e.g. tcp) interface: how a protocol is manipulated by applications (e.g. packet format) layering technique for organizing protocols into an ordered series of distinct abstractions.
Computer Network Part 2 Pdf The tcp ip model has only one mode in the network layer (connectionless) but supports both modes in the transport layer, giving the users a choice. this choice is especially important for simple request response protocols. Most computer nets connected by internet protocol runs over a variety of physical networks, so can connect ethernet, wireless, people behind modem lines, etc. The layer 3 switch functions at the network layer and performs the multiport, virtual lan, data pipelining functions of a standard layer 2 switch. it can also perform basic routing functions between virtual lans. It outlines the functions of each layer, including the physical, data link, network, transport, and application layers, emphasizing their roles in data transmission and communication. the chapter also highlights the peer to peer processes and modularity provided by layer interfaces.

Computer Network Lecture 2 Notes Computer Network Lecture 2 Notes A The layer 3 switch functions at the network layer and performs the multiport, virtual lan, data pipelining functions of a standard layer 2 switch. it can also perform basic routing functions between virtual lans. It outlines the functions of each layer, including the physical, data link, network, transport, and application layers, emphasizing their roles in data transmission and communication. the chapter also highlights the peer to peer processes and modularity provided by layer interfaces. Computer networks and internets: an overview of concepts, terminology, and technologies that form the basis for digital communication in individual networks and the global internet. Network layer virtual circuit networks 3 phases establish a virtual circuit. the network layer finds the path from the source to the destination. reserve resources for the virtual circuit. transfer data packets pass through the virtual circuit. In a network with two hosts and routers in between, the network layer in host 1 encapsulates segments into datagrams and sends them to the nearby router, while the network layer in host 2 receives the datagrams from its nearby router, extracts the segments, and delivers them to the transport layer. Network layer: network layer design issues: store and forward packet switching, services provided to the transport layer, implementation of connectionless service, implementation of connection oriented service, comparison of virtual circuit & datagram subnets.