Bliss Info Systems Interview Questions, Process, and Tips

The port number for DHCP is 67 (server) and 68 (client).

• DHCP server uses port 67 for incoming requests from clients

• DHCP client uses port 68 for sending requests to the server

VPN stands for Virtual Private Network. It is used to create a secure connection to another network over the internet.

• VPN encrypts your internet connection to ensure privacy and security

• It allows you to access restricted websites or content

• VPN can be used to bypass geo-restrictions and access content from different countries

• It is commonly used by remote workers to securely access company resources

DNS stands for Domain Name System. It is used to translate domain names into IP addresses.

• DNS helps in translating human-readable domain names into machine-readable IP addresses.

• It helps in locating and identifying devices on the Internet.

• DNS also helps in load balancing and failover.

• Example: Translating www.google.com to 172.217.3.100.

Firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.

• Firewall acts as a barrier between a trusted internal network and untrusted external network

• It can be implemented in hardware or software

• Firewalls can be configured to block or allow specific traffic based on rules set by the network administrator