Fill in the blanks in the following statements. 1. The layers which are implemen

Question

Fill in the blanks in the following statements. 1. The layers which are implemented in all of the network devices are 2. 3. 4. File transfer applications use networks keep state information about the connections. networks require full destination address to route the packets. protocol which opens two TCP connections on different ports for applications access the servers using andprotocols. transfer multiple objects over a single connection. applications mostly run over and 5. Email servers use protocol to communicate with each other where the client 6. HTTP opens a TCP connection for each object while can 7. Web and email applications run over transport protocol while real time transport protocol.

Explanation / Answer

1.The layers which are implemented in all of the network devices are physical layer,Data Link layer and Network layer.

2.Virtual Circuit(VC) networks keep state information about the connections.

3.Datagram networks require full destination address to route the packets.

4. File transfer applications use FTP(File Transfer Protocol) which opens two TCP connections on different ports for control connection and data transfer.

5.Email servers use SMTP(Simple Mail Transfer Protocol) to communicate with each other where the client application access the servers using IMAP (Internet Message Access Protocol) and POP3(Post Office Protocol version 3) protocol.

6.Non-Persistent HTTP opens a TCP connection for each object while Persistent HTTP can transfer multiple objects over a single connection.

7.Web and email applications run over TCP(Transport Control Protocol) transport protocol while real time applications mostly run over UDP(User Datagram Protocol) transport protocol.

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