Network programming management important questions in sathyabama
Answers
Answer:
Q #1) What is a Network?
Ans: A network is a set of devices connected to each other using a physical transmission medium.
Example: A Computer Network is a group of computers connected with each other to communicate and share information and resources like hardware, data, and software across each other.
In a network, nodes are used to connect two or more networks.
Q #2) What is a Node?
Ans: Two or more computers are connected directly by an optical fiber or any other cable. A node is a point where a connection established. It is a network component which is used to send, receive and forward the electronic information.
A device connected to a network is also termed as Node. Let's consider that in a network there are 2 computers, 2 printers, and a server are connected, then we can say that there are five nodes on the network.
Q #3) What is Network Topology?
Ans: Network Topology is a physical layout of the computer network and it defines how the computers, devices, cables etc are connected to each other.
Q #4) What are Routers?
Ans: The router is a network device which connects two or more network segments. The router is used to transfer information from the source to destination.
Routers send the information in terms of data packets and when these data packets are forwarded from one router to another router then the router reads the network address in the packets and identifies the destination network.
Q #5) What is OSI reference model?
Ans: Open System Interconnection, the name itself suggest that it is a reference model which defines how applications can communicate with each other over a networking system.
It also helps to understand the relationship between networks and defines the process of communication in a network.
Q #6) What are the layers in OSI Reference Models? Describe each layer briefly.
Ans: Given below are the seven layers of OSI Reference Models:
#1) Physical Layer (Layer 1): Physical Layer converts data bits into electrical impulse or radio signals. E.g. Ethernet.
#2) Data Link Layer (Layer 2): At Data Link layer, data packets are encoded and decoded into bits and it provides a node to node data transfer. Data Link Layer also detects the errors occurred at Layer 1.
#3) Network Layer (Layer 3): Network Layer transfers variable length data sequence from one node to another node in the same network. This variable length data sequence is also known as “Datagrams”.
#4) Transport Layer (Layer 4): It transfers data between nodes and also provides acknowledgment of successful data transmission. It keeps track of transmission and sends the segments again if the transmission fails.
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