Q15 2024 Exam

Question 1

What is Virtual Private Network (VPN)?

Answer 1

A Virtual Private Network (VPN) is a technology that creates a secure, encrypted connection over a public or untrusted shared network (like the Internet). It allows users to send and receive data as if their devices were directly connected to a private network. Key features include encryption, tunneling, authentication, anonymity/IP masking, and remote access.

Question 2

What is Virtual Local Area Network (VLAN)?

Answer 2

A Virtual Local Area Network (VLAN) is a local area network configured by software, not by physical wiring. It allows for virtually connecting devices that may be located in different physical LANs. IEEE 802.1Q is the protocol most commonly used today to configure VLANs.

Question 3

What is Source Network Address Translation (SNAT)?

Answer 3

Source Network Address Translation (SNAT) is a technique where the destination IP address is maintained, but the source IP address is changed. It allows a host on the “inside” of the NAT to initiate a connection to a host on the “outside” of the NAT. This is a way to conserve IP addresses by hiding a number of hosts behind a single IP address.

Question 4

What is Destination Network Address Translation (DNAT)?

Answer 4

Destination Network Address Translation (DNAT) is a technique where the destination address is changed, and the source IP address is maintained. It allows a host on the “outside” to connect to a host on the “inside”. This is a way to conserve IP addresses by hiding a number of hosts behind a single IP address.