CompTIA Network+ (N10-009) — Question 333

Which of the following routing protocols is most commonly used to interconnect WANs?

Answer options

• A. IGP
• B. EIGRP
• C. BGP
• D. OSPF

Correct answer: C

Explanation

BGP, or Border Gateway Protocol, is the standard routing protocol used for interconnecting WANs as it is designed to handle the routing between autonomous systems on the Internet. While IGP, EIGRP, and OSPF are effective for internal routing within networks, they are not suitable for interconnecting different WANs.