CompTIA Network+ (N10-007) — Question 319

Which of the following WAN technologies swaps the header on a packet when internally switching from one provider router to another?

Answer options

• A. ATM
• B. Frame relay
• C. MPLS
• D. PPP

Correct answer: C

Explanation

MPLS (Multiprotocol Label Switching) is the correct answer because it uses labels to direct packets, effectively swapping the header as they traverse different routers. In contrast, ATM, Frame Relay, and PPP do not change the header in the same manner during their switching processes.