Week 4 - VPNs

Question 1

What does VPN stand for?

Answer 1

Virtual Private Network

Question 2

3 steps on how a VPN works?

Answer 2

1. VPNs carry an encrypted data packet (with a 2nd set of data packets) to the endpoint of the VPN server
2. VPN Server strips away encryption, leaves top 3 layers of a new packet
3. New packet is encapsulated with data link information and sent out to LAN

Question 3

What is a VPN defined?

Answer 3

VPNs use an encrypted tunnel to allow remote computers/routers to connect to a network as if they were physically connected

Question 4

What is two-factor authentication?

Answer 4

more than just a username and password is required to authenticate (a short lived token is used)

Question 5

What’s a proxy service?

Answer 5

a server acts on behalf of client to access a service

Question 6

What are web proxies use for today?

Answer 6

if a business wants to limit access to a certain website (like twitch)

Question 7

What is a reverse proxy?

Answer 7

a reverse proxy appears as a single server but distributes incoming requests to a website to many physical servers

Question 8

What are some ways reverse proxies are used?

Answer 8

• load balancing
• uses hardware built for cryptography