Joanna is a qualified network specialist and has worked in this role for about six years. Her manager recommends that she enhance her qualifications for career advancement in the same role. What additional certifications can Joanna aim for? SAS Certified Base

Cisco's CCENT

Cisco's CCNA

Explanation:

Since in the question it is mentioned that Joanna who is a  qualified network specialist and has worked for six years also her manager suggest her to enhance her qualification so that the career could be better due to which she can gets the better package and opportunity as compared to before

Therefore the additional certification that needed is CCENT and CCNA and the same is to be considered. These are the networking certifications.