NTT Data Network Administrator Interview Questions and Answers

DHCP assigns IP addresses to devices on a network automatically

• DHCP server assigns IP addresses to devices on the network

• DHCP clients request IP addresses from the DHCP server

• DHCP uses a lease mechanism to manage IP address assignments

• DHCP reduces the administrative burden of manually assigning IP addresses

DNS is a system that translates domain names to IP addresses to locate resources on the internet.

• DNS resolves domain names to IP addresses

• DNS operates through a distributed database system

• DNS uses hierarchical structure with top-level domains like .com, .org, etc.

• DNS queries are resolved through recursive and iterative processes

SD-WAN technology is a software-defined approach to managing wide area networks, allowing for centralized control and automation.

• SD-WAN uses software to dynamically route traffic across the network based on real-time conditions.

• It can prioritize critical applications and optimize performance by utilizing multiple connection types.

• SD-WAN simplifies network management and reduces costs by replacing expensive MPLS connect...read more

A network is a group of interconnected devices that communicate with each other. An IP address is a unique identifier assigned to each device on a network.

• A network is a collection of devices such as computers, printers, and servers that are connected to each other.

• An IP address is a unique identifier assigned to each device on a network to enable communication between devices.

• The range of an IP address is determined b...read more

Answering questions related to network administration including subnetting, host configuration, and routing protocols.

• Subnetting involves dividing a network into smaller subnetworks for better management and security.

• Host configuration refers to the setup and management of individual devices on a network.

• Standard and extended ACLs are used to control access to network resources based on IP addresses.

• Routing protocols l...read more

OSI stands for Open Systems Interconnection. It is a conceptual model that describes how data is transmitted over a network.

• OSI model has 7 layers, each with a specific function

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

• Each layer communicates with the layer above and below it

• The model helps ensure interoperability between different network devices and software

• Example...read more