Nokia Certified Network Associate (NCNA) — Question 32

How do protocols such as ATM and Frame-Relay support differentiating multiple customers or traffic types on the same physical wire?

Answer options

• A. ATM and Frame-Relay are circuit switched protocols and use Virtual Circuits to create logical separation of traffic.
• B. ATM and Frame-Relay are point-to-point protocols and do not support different customers or traffic type on the same physical wire.
• C. ATM and Frame-Relay are circuit switched protocols and use VLAN's to create logical separation of traffic.
• D. ATM and Frame-Relay are circuit switched protocols and use IP Header information to create logical separation of traffic.

Correct answer: A

Explanation

The correct answer is A because ATM and Frame-Relay utilize Virtual Circuits to logically separate different types of traffic and customers on the same physical connection. Options B, C, and D are incorrect as they mischaracterize the protocols; B incorrectly states they are point-to-point, C incorrectly mentions VLANs, and D mistakenly suggests the use of IP Header information for separation.