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How can lost data be re-sent when the network layer uses unreliable and connectionless?
There is an optional checksum field that can be used by an UDP application, but in general a connectionless protocol does not use re-transmits of packets. It is assumed that this type of transport is sufficient even with lost packets. It is typically used where speed is more important than quality.
What else can I help you with?
Who is layer for protocal is used to provide connectionless server?
application layer is privide connectionless server
What protocols do not guarantee delivery of their data but do operate with a very low overhead that conserves network bandwidth?
connectionless protocols - transport layer
What difference does it make to the network layer if the underlying data link layer provides a connection-oriented service versus a connectionless service?
http://dpnm.postech.ac.kr/cs413/asn/asn4-solution.pdf
All transport layer protocols are concerned with reliability?
I'm gonna say they most definitely are NOT all concerned with reliability. UDP is a transport layer protocol that provides connectionless, unreliable data delivery services.
Describe the type of services provided by data link layer to the network layer. list three MAC sub layer protocols?
Data Link layer:Data link layer has several functions to perform they are providing a well defined service to the network layer, determining how the bits of the physical layer are grouped into frames, dealing with transmission errors, regulating the flow of frames so that slow receivers are not swamped by fast senders, and general link management.Services provided to the network layer:The principal service provided by the data link layer to the network layer is the transmission of data from the source network layer to destination network layer. This can be accompolished in 3 ways:1. Un acknowledged connectionless service.2. Acknowledged connectionless service.3. Connection oriented service.Unacknowledged connectionless service consists of having the source machine send independent frames to the destination machine without having the destination machine acknowledge them. This is used where the re is a very low chance of transmission errors.In Acknowledged connectionless service the source machine send the frames indepenedently to the destination machine, but with acknowlegement to each and every frame from the destination machine.In connectin oriented service a connection is established between the source and the destination until all the data is transfered.
Ipv4 is connectionless or connection oriented?
It's neither. IP is a transport layer protocol. Connection/Connectionless imply the network layer. Look up the OSI model. Actually you are correct, but it doesn't just go that far. The definition of connectionless is the ability to send and receive packets without already establishing connectivity between two or more specific entities. IPv4 is connectionless, meaning if I send information via IPv4 I can just send the packets without having to do much more than click "return". Hope this helps.
Which protocol working at the Transport layer provides a connectionless service between hosts?
There are many connectionless protocols depending on which layer of the OSI model you are referring to. An example would be UDP for transport, and IP for routing.
Suppose your network is connected to another network via a router which OSI model layer provides the information necessary to direct data between the two networks?
The Network layer is where the frames of the Data Link layer become packets. The best way to think of the Network layer is as the mailroom clerk of the OSI model. The clerk receives mail and directs it to the appropriate couriers. In similar fashion, the Network layer translates the frames it receives from the Data Link layer into more logical packets which can be routed to other networks (like sending it to a courier). At the Network layer, you can begin to actually communicate across a Network, but the service is called "unreliable" because no connection can be established. Communication over the Network layer is something like throwing a message in a bottle into the sea - you cannot verify that the other person ever reads the message. It should be noted that most of what we call "routing" occurs at the network layer - that is, network traffic is routed from one network to another at this layer, allowing for inter-network (as opposed to intra-network) communication.
Router work in which layer of osi model?
Routers work in layers two, three, and four layer 1 Physical (copper, fiber,...) layer 2 Datalink (ethernet, token ring, ...) 2->3 providing address resolution (ARP) ie. media access control (MAC) to IP translation layer 3 Network (IP,IPX,RIP,...) 3->4 providing routing layer 4 Transport provides error handling in connectin oriented delivery and handles connectionless delivery Conneciton Oriented(TCP,SPX) Connectionless (UDP)
What is a connectionless protocol?
Connectionless Protocols: These protocols do not establish a connection between devices. As soon as a device has data to send to another, it just sends it. Answer:A Connectionless Protocol is a data communication method in which communication occurs between hosts with no previous setup. The device at one end of the communication transmits data to the other, without first ensuring that the recipient is available and ready to receive the data. The device sending a message simply sends it addressed to the intended recipient. The Internet Protocol (IP) and User Datagram Protocol (UDP) are connectionless protocols, but TCP/IP (the most common use of IP) is connection-oriented
Which layer is absent in broadcast network?
network layer
Where do connection-oriented and connectionless communications fit into the OSI model?
Connection-oriented communication fits into the Transport layer (Layer 4) of the OSI model, where protocols like TCP establish a connection before data transmission, ensuring reliable delivery. In contrast, connectionless communication also operates at the Transport layer but utilizes protocols like UDP, which send data without establishing a connection, prioritizing speed over reliability. Both types are essential for different application needs, balancing reliability and efficiency in network communications.
