Encryption and VPNs

Question 1

Describe encryption

Answer 1

A sender applies encryption to scramble the data bits in such a way that only the intended recipient can unscramble them

Question 2

What are two types of encryption?

Answer 2

Private-key (symmetric) and public-key (asymmetric) encryption

Question 3

Describe private-key (symmetric) encryption?

Answer 3

One key exists which serves as the encryption and decryption key and this must be kept private

Question 4

Describe public-key (asymmetric) encryption?

Answer 4

Each entity is assigned a pair of keys (public and private), either can be used as encryption key

Question 5

Describe a private network

Answer 5

A company uses a leased line so data can be exchanged privately and safely but they are expensive

Question 6

What is a VPN?

Answer 6

A VPN uses encryption to provide secure access to an organisation’s intranet from remote sites, traffic between sites is encrypted with a VPN