QUESTION $3(15$ marks$)$

a$.$ Briefly describe the difference between a Hub, Switch and Router. Be sure to include the

implications of choosing one over the other to connect network devices.

b$.$ With the use of a diagram, describe how DNS Lookup translates a domain name into an

IP address. You are to assume that the IP address is not currently cached.

c$.$ Why would an organization choose to have a Static IP address rather than a dynamically

assigned one? In doing so$,$ give one service that tends to be impacted by a company

having a dynamically assigned IP address.

d$.$ Define the term VPN and list the two common types of VPNs briefly explaining the

differences between them.