CCNA Exploration 4 - Module 1 Exam Answers Version 4.0
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1. At which two layers of the OSI model does a WAN operate? (Choose two.) • Physical Layer • Data Link Layer • Network Layer • Transport Layer • Presentation Layer • Application Layer 2. Which three WAN devices can be found in the cloud? (Choose three.) • ATM switches • core routers • CSU/DSU • Ethernet switches • Frame Relay switches •