CompTIA Network+ (N10-008) — Question 508

Which of the following routing protocols uses an autonomous system number?

Answer options

• A. IS-IS
• B. EIGRP
• C. OSPF
• D. BGP

Correct answer: D

Explanation

BGP (Border Gateway Protocol) is specifically designed to operate between different autonomous systems, utilizing an autonomous system number for this purpose. In contrast, IS-IS, EIGRP, and OSPF are interior gateway protocols that do not require autonomous system numbers as they operate within a single autonomous system.