To increase security on your company's internal network, the administrator has disabled as many ports as possible. Now, however, you can browse the internet, but you are unable to perform secure credit card transactions when making purchases from e-commerce websites. Which port needs to be enabled to allow secure transactions

443

Explanation:

Port 443 will need to be enabled for secure transactions to go through because it is the default port for HTTPS which is the transfer protocol for secure communication.

This way your credit card transactions will be encrypted to ensure protection from those who would seek to steal your data and your money.  

i think its controle not shift