Calcutta National Medical College & Hospital Interview Questions and Answers

The OSI model has 7 layers that define how data is transmitted over a network.

• The layers are: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Each layer has a specific function and communicates with the layers above and below it.

• For example, the Physical layer deals with the physical transmission of data, while the Application layer deals with user interfaces and applications.

• The OSI model is a conceptual model and is used to help understand ho...read more

Replication is the process of creating and maintaining copies of data or databases in multiple locations.

• Replication is used to improve data availability and reliability.

• It can be done through various methods such as snapshot replication, transactional replication, and merge replication.

• Replication is commonly used in distributed systems, disaster recovery, and load balancing.

• Examples of replication include replicating a database from a primary server to a secondary server fo...read more

Yes, WDS is a tool for remote OS installation over the network.

• WDS stands for Windows Deployment Services.

• It allows IT administrators to remotely install Windows operating systems on multiple computers simultaneously.

• WDS uses network boot to start the installation process.

• It can also be used to deploy custom images and applications.

• WDS is a free feature included in Windows Server.

• It requires DHCP and DNS services to be configured correctly.

• WDS can save time and effort in larg...read more

DHCP port number is 67 for the server and 68 for the client.

• DHCP server uses port 67 to listen for client requests.

• DHCP client uses port 68 to send requests to the server.

• These port numbers are specified in the UDP protocol.

DNS stands for Domain Name System. It is a decentralized naming system that translates domain names into IP addresses.

• DNS is used to convert human-readable domain names (e.g., www.example.com) into IP addresses (e.g., 192.0.2.1).

• It helps in the efficient routing of internet traffic by mapping domain names to their corresponding IP addresses.

• DNS also provides other important information, such as mail server records (MX records) and text records (TXT records).

• It operates throug...read more