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All computer network Interview Questions
81.What do you mean by protocol stack ?
Ans: The list of protocols used by certain system ,one protocol per layer is called protocol stack.
82.What do you mean by peer ?
Ans: Entities comprising the corresponding layers on different machines are called peers.It may be
• hardware device.
• processes
• human being
peers communicate by using protocol.
83.What do you mean by broadcasting ?
Ans: Broadcast system allow addressing a packet to all destination by using a special code in address field.when packet is transmitted it is received and processed by every machine on the network.
84.What are the advantages of broadcast network.
Ans:
• a single communication channel is shared by all computers.
• packets are transmitted and received by all the computer.
• address field is attached to whom it is intended.
• multicasting is used in network.
85.What do you mean by point to point network?
Ans: Point to point network consist of many connections between individual pair of machines.large networks are point to point.Routing algorithm plays an important in point to point network.It uses stored ad forword technique.It is a packet switching network.
86.What are the design issue of layers ?
Ans: The design issue of layer are
• Addressing technique.ie source and destination address
• Types of communication
• Error control
• Order of message.
• Speed matching
• Multiplexing and demultiplexing.
87.What are the protocols in application layer ?
Ans: The protocols defined in application layer are
• TELNET
• FTP
• SMTP
• DNS
88.What are the protocols in transport layer ?
Ans: The protocols defined in transport layer are
• TCP
• UDP
89.Define TCP ?
Ans: It is connection oriented protocol.It consist byte streams oeiginating on one machine to be delivered without error on any other machine in the network.while transmitting it fragments the stream to discrete messages and passes to interner layer.At the destination it reassembles the messages into output stream.
90.Define UDP ?
Ans: It is unreliable connectionless protocol.It is used for one-shot,client-server type,requesr-reply queries and applications in which prompt delivery is required than accuracy.
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