Invensis Technologies System Engineer Interview Questions and Answers

An IP address is a unique numerical identifier assigned to devices connected to a network.

• IP stands for Internet Protocol

• It consists of a series of numbers separated by dots

• There are two types of IP addresses - IPv4 and IPv6

• IPv4 addresses are 32-bit and IPv6 addresses are 128-bit

• Examples of IP addresses are 192.168.0.1 and 2001:0db8:85a3:0000:0000:8a2e:0370:7334

DNS translates domain names to IP addresses to enable communication between devices on the internet.

• DNS stands for Domain Name System.

• When a user types a domain name in their browser, the browser sends a request to a DNS resolver.

• The resolver then sends a request to a DNS root server to find the authoritative name server for the domain.

• The authoritative name server responds with the IP address associated with the domai...read more

MX record is a DNS record that specifies the mail server responsible for accepting email messages on behalf of a domain.

• MX record stands for Mail Exchange record

• It is used to route emails to the correct mail server

• MX record contains a priority value to determine the order of mail servers to try

• Example: MX record for domain example.com could be '10 mail.example.com' and '20 backup.example.com'

• Without an MX record, email

DORA (Discover Offer Request Acknowledge) is a process used by DHCP clients to obtain IP addresses.

• DORA is an acronym for Discover, Offer, Request, and Acknowledge.

• It is a process used by DHCP clients to obtain IP addresses from DHCP servers.

• The client sends a Discover message to the server, which responds with an Offer message containing an available IP address.

• The client then sends a Request message to the server, in...read more